{"id":107999,"date":"2026-09-20T18:33:28","date_gmt":"2026-09-20T10:33:28","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/107999.html"},"modified":"2026-09-20T18:33:28","modified_gmt":"2026-09-20T10:33:28","slug":"%e8%bd%bb%e6%9d%be%e5%ad%a6%e4%b9%a0zephyr-bsp-28-company-uart-%e9%a9%b1%e5%8a%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/107999.html","title":{"rendered":"\u8f7b\u677e\u5b66\u4e60Zephyr BSP: 28-Company UART \u9a71\u52a8"},"content":{"rendered":"<p>\u6458\u8981&#xff1a;\u672c\u6587\u5b8c\u6574\u8d70\u901a Zephyr \u4ece Devicetree \u7684 compatible &#061; &#034;company,uart&#034; \u5230\u771f\u6b63\u53ef\u8fd0\u884c\u7684 UART Driver \u5168\u94fe\u8def\u3002\u6587\u7ae0\u4ece\u6574\u4f53\u67b6\u6784\u51fa\u53d1&#xff0c;\u4f9d\u6b21\u5b9a\u4e49\u5bc4\u5b58\u5668\u3001Config\u3001Data&#xff0c;\u5b9e\u73b0 poll_out() \u4e0e poll_in()&#xff0c;\u6ce8\u518c uart_driver_api&#xff0c;\u5e76\u901a\u8fc7 DT_INST_REG_ADDR() \u4ece Devicetree \u81ea\u52a8\u83b7\u53d6 base address&#xff0c;\u6700\u7ec8\u7528 DEVICE_DT_INST_DEFINE() \u751f\u6210\u8bbe\u5907\u5b9e\u4f8b\u3002\u5168\u6587\u4ee5 Company SoC \u7684 UART0&#xff08;base &#061; 0x40000000&#xff09;\u4e3a\u4f8b&#xff0c;\u7ed9\u51fa\u53ef\u76f4\u63a5\u843d\u5730\u7684\u6700\u5c0f Driver \u9aa8\u67b6&#xff0c;\u5e76\u8bf4\u660e Polling \u6a21\u5f0f\u4e3a\u4f55\u6682\u4e0d\u4f7f\u7528 interrupts \u5c5e\u6027&#xff0c;\u5e2e\u52a9\u8bfb\u8005\u7406\u89e3 Zephyr Driver Model \u7684\u6838\u5fc3\u95ed\u73af\u3002<\/p>\n<p>\u76ee\u5f55<\/p>\n<ul>\n<li>\u4e00\u3001\u8fd9\u4e00\u7bc7\u6211\u4eec\u6700\u7ec8\u8981\u5f97\u5230\u4ec0\u4e48<\/li>\n<li>\u4e8c\u3001\u5148\u5efa\u7acb\u6574\u4f53\u67b6\u6784<\/li>\n<li>\u4e09\u3001\u7b2c\u4e00\u6b65&#xff1a;\u5b9a\u4e49 UART \u5bc4\u5b58\u5668<\/li>\n<li>\u56db\u3001\u7b2c\u4e8c\u6b65&#xff1a;\u5b9a\u4e49 Driver Config<\/li>\n<li>\u4e94\u3001\u7b2c\u4e09\u6b65&#xff1a;\u5b9a\u4e49 Driver Data<\/li>\n<li>\u516d\u3001\u7b2c\u56db\u6b65&#xff1a;\u5b9e\u73b0 poll_out()<\/li>\n<li>\u4e03\u3001\u4e3a\u4ec0\u4e48\u4f7f\u7528 sys_read32()&#xff1f;<\/li>\n<li>\u516b\u3001\u7b2c\u4e94\u6b65&#xff1a;\u5b9e\u73b0 poll_in()<\/li>\n<li>\u4e5d\u3001\u7b2c\u516d\u6b65&#xff1a;\u5b9a\u4e49 Zephyr UART API<\/li>\n<li>\u5341\u3001uart_poll_out() \u5230\u5e95\u53d1\u751f\u4e86\u4ec0\u4e48&#xff1f;<\/li>\n<li>\u5341\u4e00\u3001\u7b2c\u4e03\u6b65&#xff1a;Driver Init<\/li>\n<li>\u5341\u4e8c\u3001\u7b2c\u516b\u6b65&#xff1a;\u4ece Devicetree \u83b7\u53d6 base address<\/li>\n<li>\u5341\u4e09\u3001\u771f\u6b63\u91cd\u8981\u7684\u4e00\u70b9&#xff1a;DT_INST_*<\/li>\n<li>\u5341\u56db\u3001\u7b2c\u4e5d\u6b65&#xff1a;\u751f\u6210 Device Instance<\/li>\n<li>\u5341\u4e94\u3001\u5b8c\u6574 Driver \u9aa8\u67b6<\/li>\n<li>\u5341\u4e94\u70b9\u4e94\u3001\u5b8c\u6574 Driver \u6587\u4ef6\u7ed3\u6784\u8bf4\u660e<\/li>\n<li>\u5341\u516d\u3001\u5b83\u548c\u7b2c 27 \u7bc7 Binding \u5230\u5e95\u600e\u4e48\u8fde\u63a5&#xff1f;<\/li>\n<li>\u5341\u4e03\u3001\u4f46\u662f\u73b0\u5728\u6709\u4e00\u4e2a&#034;\u5751&#034;<\/li>\n<li>\u5341\u516b\u3001Polling \u4e0e Interrupt \u6a21\u5f0f\u5bf9\u6bd4<\/li>\n<li>\u5341\u4e5d\u3001\u5982\u4f55\u4ece\u5f53\u524d\u9aa8\u67b6\u6269\u5c55\u4e3a\u4e2d\u65ad\u9a71\u52a8 UART<\/li>\n<li>\u4e8c\u5341\u3001\u5b8c\u6574\u7684\u4e2d\u65ad\u9a71\u52a8 UART \u4ee3\u7801\u793a\u4f8b<\/li>\n<li>\u4e8c\u5341\u4e00\u3001\u4e0e Polling \u9aa8\u67b6\u7684\u5bf9\u6bd4<\/li>\n<li>\u4e8c\u5341\u4e8c\u3001\u5982\u4f55\u9a8c\u8bc1 Driver \u662f\u5426\u5de5\u4f5c<\/li>\n<\/ul>\n<p>Company UART Driver&#xff1a;\u4ece compatible \u5230\u771f\u6b63\u7684 uart_poll_out()<\/p>\n<p>\u8fd9\u4e00\u7bc7\u6b63\u5f0f\u628a\u524d\u9762 SoC BSP &#043; Devicetree &#043; Binding \u4e32\u8d77\u6765&#xff0c;\u5199\u51fa\u7b2c\u4e00\u4e2a\u771f\u6b63\u53ef\u4ee5\u5de5\u4f5c\u7684 Company UART Driver\u3002<\/p>\n<p>\u5230\u7b2c 27 \u7bc7\u4e3a\u6b62&#xff0c;\u6211\u4eec\u5df2\u7ecf\u89e3\u51b3\u4e86&#xff1a;<\/p>\n<p>Board<br \/>\n\u2193<br \/>\nDevicetree<br \/>\n\u2193<br \/>\nBinding<br \/>\n\u2193<br \/>\nSoC<br \/>\n\u2193<br \/>\n\u5730\u5740 \/ IRQ \/ clock \/ status<\/p>\n<p>\u73b0\u5728\u8981\u89e3\u51b3\u6700\u540e\u4e00\u4e2a\u5173\u952e\u95ee\u9898&#xff1a; Zephyr \u600e\u4e48\u628a compatible &#061; \u201ccompany,uart\u201d \u53d8\u6210\u4e00\u4e2a\u771f\u6b63\u7684 UART Driver&#xff0c;\u5e76\u6700\u7ec8\u8ba9\u5e94\u7528\u7a0b\u5e8f\u8c03\u7528 uart_poll_out()&#xff1f;<\/p>\n<p>\u4e00\u3001\u8fd9\u4e00\u7bc7\u6211\u4eec\u6700\u7ec8\u8981\u5f97\u5230\u4ec0\u4e48<\/p>\n<p>\u5047\u8bbe Company SoC \u6709\u4e00\u4e2a UART&#xff1a;<\/p>\n<p>UART0<br \/>\nbase address <span class=\"token operator\">&#061;<\/span> 0x40000000<br \/>\nIRQ <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">5<\/span><br \/>\nclock <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">24<\/span> MHz<\/p>\n<p>Devicetree&#xff1a;<\/p>\n<p>uart0: uart&#064;40000000 <span class=\"token punctuation\">{<\/span><br \/>\n    compatible <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;company,uart&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    reg <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&lt;<\/span>0x40000000 0x100<span class=\"token operator\"><span class=\"token file-descriptor important\">0<\/span>&gt;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    interrupts <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token operator\"><span class=\"token file-descriptor important\">5<\/span>&gt;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    status <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;okay&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5e94\u7528&#xff1a;<\/p>\n<p>const struct device *uart <span class=\"token operator\">&#061;<\/span> DEVICE_DT_GET<span class=\"token punctuation\">(<\/span>DT_NODELABEL<span class=\"token punctuation\">(<\/span>uart0<span class=\"token punctuation\">))<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>uart_poll_out<span class=\"token punctuation\">(<\/span>uart, <span class=\"token string\">&#039;H&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nuart_poll_out<span class=\"token punctuation\">(<\/span>uart, <span class=\"token string\">&#039;i&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nuart_poll_out<span class=\"token punctuation\">(<\/span>uart, <span class=\"token string\">&#039;\\\\n&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6700\u7ec8\u786c\u4ef6\u884c\u4e3a&#xff1a;<\/p>\n<p>uart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u2193<br \/>\nstruct device<br \/>\n\u2193<br \/>\nuart_api<br \/>\n\u2193<br \/>\ncompany_uart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u2193<br \/>\nUART_REG_TXDATA<br \/>\n\u2193<br \/>\n0x40000000 &#043; offset<br \/>\n\u2193<br \/>\nCompany UART<br \/>\n\u2193<br \/>\nTX pin<br \/>\n\u2193<br \/>\n<span class=\"token string\">&#034;Hi<span class=\"token entity\" title=\"\\\\\\\\\">\\\\\\\\<\/span>n&#034;<\/span><\/p>\n<p>\u8fd9\u5c31\u662f\u6211\u4eec\u8fd9\u4e00\u7bc7\u8981\u5b8c\u6574\u8d70\u901a\u7684\u94fe\u8def\u3002<\/p>\n<p>\u4e8c\u3001\u5148\u5efa\u7acb\u6574\u4f53\u67b6\u6784<\/p>\n<p>Company UART Driver \u7684\u4f4d\u7f6e&#xff1a;<\/p>\n<p>               Application<br \/>\n                     \u2502<br \/>\n                     \u2502 uart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                     \u25bc<br \/>\n          \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n          \u2502   Zephyr UART API   \u2502<br \/>\n          \u2502 uart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>     \u2502<br \/>\n          \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n                     \u2502<br \/>\n                     \u25bc<br \/>\n             struct device<br \/>\n                     \u2502<br \/>\n                     \u251c\u2500\u2500 config<br \/>\n                     \u251c\u2500\u2500 data<br \/>\n                     \u2514\u2500\u2500 api<br \/>\n                           \u2502<br \/>\n                           \u25bc<br \/>\n              \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n              \u2502 Company UART Driver\u2502<br \/>\n              \u2502                    \u2502<br \/>\n              \u2502 poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>         \u2502<br \/>\n              \u2502 poll_in<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>          \u2502<br \/>\n              \u2502 init<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>             \u2502<br \/>\n              \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n                        \u2502<br \/>\n                        \u25bc<br \/>\n                UART registers<br \/>\n                        \u2502<br \/>\n                        \u25bc<br \/>\n                 Company SoC<\/p>\n<p>\u6ce8\u610f&#xff1a; UART Driver \u672c\u8eab\u5e76\u4e0d\u8d1f\u8d23&#034;\u5b9a\u4e49 UART \u662f\u4ec0\u4e48&#034;\u3002 UART \u786c\u4ef6\u5df2\u7ecf\u7531 Devicetree \u63cf\u8ff0&#xff1a;<\/p>\n<p>compatible<br \/>\nreg<br \/>\ninterrupts<br \/>\nclocks<br \/>\nstatus<\/p>\n<p>Driver \u8d1f\u8d23&#xff1a;<\/p>\n<p>\u5982\u4f55\u64cd\u4f5c\u8fd9\u4e2a\u786c\u4ef6\u3002<\/p>\n<p>\u4e09\u3001\u7b2c\u4e00\u6b65&#xff1a;\u5b9a\u4e49 UART \u5bc4\u5b58\u5668<\/p>\n<p>\u5047\u8bbe Company UART \u7684\u5bc4\u5b58\u5668\u5982\u4e0b&#xff1a;<\/p>\n<p>offset  register<\/p>\n<p>0x00    DATA<br \/>\n0x04    STATUS<br \/>\n0x08    CTRL<br \/>\n0x0C    BAUD<\/p>\n<p>STATUS&#xff1a;<\/p>\n<p>bit <span class=\"token number\">0<\/span> <span class=\"token operator\">&#061;<\/span> TX_READY<br \/>\nbit <span class=\"token number\">1<\/span> <span class=\"token operator\">&#061;<\/span> RX_READY<\/p>\n<p>\u90a3\u4e48&#xff1a;<\/p>\n<p><span class=\"token comment\"># define COMPANY_UART_DATA 0x00<\/span><br \/>\n<span class=\"token comment\"># define COMPANY_UART_STATUS 0x04<\/span><\/p>\n<p><span class=\"token comment\"># define COMPANY_UART_CTRL 0x08<\/span><br \/>\n<span class=\"token comment\"># define COMPANY_UART_BAUD 0x0C<\/span><\/p>\n<p><span class=\"token comment\"># define COMPANY_UART_STATUS_TX_READY BIT(0)<\/span><br \/>\n<span class=\"token comment\"># define COMPANY_UART_STATUS_RX_READY BIT(1)<\/span><\/p>\n<p>\u8fd9\u91cc\u7684 offset \u662f&#xff1a;<\/p>\n<p>UART base<br \/>\n   &#043;<br \/>\nregister offset<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>0x40000000 &#043; 0x04<\/p>\n<p>\u5c31\u662f&#xff1a;<\/p>\n<p>UART_STATUS<\/p>\n<p>\u56db\u3001\u7b2c\u4e8c\u6b65&#xff1a;\u5b9a\u4e49 Driver Config<\/p>\n<p>Zephyr Driver \u901a\u5e38\u4f1a\u628a\u786c\u4ef6\u9759\u6001\u4fe1\u606f\u653e\u8fdb&#xff1a;<\/p>\n<p>struct company_uart_config<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>struct company_uart_config <span class=\"token punctuation\">{<\/span><br \/>\n    uintptr_t base<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u4e3a\u4ec0\u4e48\u4e0d\u76f4\u63a5\u5199&#xff1a;<\/p>\n<p><span class=\"token comment\"># define UART_BASE 0x40000000<\/span><\/p>\n<p>&#xff1f; \u56e0\u4e3a\u6211\u4eec\u7684 Driver \u8981\u652f\u6301&#xff1a;<\/p>\n<p>UART0<br \/>\nUART1<br \/>\nUART2<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>UART0 \u2192 0x40000000<br \/>\nUART1 \u2192 0x40001000<br \/>\nUART2 \u2192 0x40002000<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>struct company_uart_config <span class=\"token punctuation\">{<\/span><br \/>\nuintptr_t base<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u53ef\u4ee5\u8ba9\u6bcf\u4e2a Device Instance \u6709\u81ea\u5df1\u7684 base\u3002<\/p>\n<p>\u4e94\u3001\u7b2c\u4e09\u6b65&#xff1a;\u5b9a\u4e49 Driver Data<\/p>\n<p>\u5148\u505a\u6700\u7b80\u5355\u7684 polling UART\u3002 \u53ef\u4ee5\u6682\u65f6&#xff1a;<\/p>\n<p>struct company_uart_data <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u751a\u81f3&#xff1a;<\/p>\n<p>struct company_uart_data <span class=\"token punctuation\">{<\/span><br \/>\nuint32_t baudrate<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>struct company_uart_data <span class=\"token punctuation\">{<\/span><br \/>\nuint32_t baudrate<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd9\u91cc\u9700\u8981\u7406\u89e3\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u539f\u5219&#xff1a;<\/p>\n<p>Config<\/p>\n<p>\u901a\u5e38\u653e&#xff1a; \u7f16\u8bd1\u65f6\u3001\u786c\u4ef6\u56fa\u5b9a\u7684\u4fe1\u606f \u4f8b\u5982&#xff1a;<\/p>\n<p>base address<br \/>\nIRQ<br \/>\nclock<br \/>\npin configuration<\/p>\n<p>Data<\/p>\n<p>\u901a\u5e38\u653e&#xff1a; \u8fd0\u884c\u65f6\u53ef\u80fd\u53d8\u5316\u7684\u4fe1\u606f \u4f8b\u5982&#xff1a;<\/p>\n<p>current baudrate<br \/>\nruntime state<br \/>\nbuffers<br \/>\nlocks<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>struct company_uart_config<br \/>\n        \u2502<br \/>\n        \u251c\u2500\u2500 base<br \/>\n        \u2514\u2500\u2500 irq<\/p>\n<p>struct company_uart_data<br \/>\n        \u2502<br \/>\n        \u251c\u2500\u2500 baudrate<br \/>\n        \u2514\u2500\u2500 runtime state<\/p>\n<p>\u516d\u3001\u7b2c\u56db\u6b65&#xff1a;\u5b9e\u73b0 poll_out()<\/p>\n<p>\u8fd9\u662f\u6574\u4e2a Driver \u6700\u91cd\u8981\u7684\u7b2c\u4e00\u4e2a\u51fd\u6570\u3002<\/p>\n<p>Zephyr UART API&#xff1a;<\/p>\n<p>static void company_uart_poll_out<span class=\"token punctuation\">(<\/span><br \/>\n    const struct device *dev,<br \/>\n    unsigned char c<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u9996\u5148\u83b7\u53d6 config&#xff1a;<\/p>\n<p><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> \\\\<span class=\"token operator\">*<\/span>config <span class=\"token operator\">&#061;<\/span><br \/>\ndev<span class=\"token operator\">-&gt;<\/span>config<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u7136\u540e&#xff1a;<\/p>\n<p>uintptr_t base <span class=\"token operator\">&#061;<\/span> config-<span class=\"token operator\">&gt;<\/span>base<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u68c0\u67e5 TX ready&#xff1a;<\/p>\n<p><span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_STATUS<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;<\/span><br \/>\n         COMPANY_UART_STATUS_TX_READY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6700\u540e&#xff1a;<\/p>\n<p><span class=\"token function\">sys_write32<\/span><span class=\"token punctuation\">(<\/span>c<span class=\"token punctuation\">,<\/span> base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_DATA<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5b8c\u6574\u903b\u8f91&#xff1a;<\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">company_uart_poll_out<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> c<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token operator\">*<\/span>config <span class=\"token operator\">&#061;<\/span> dev<span class=\"token operator\">-&gt;<\/span>config<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">uintptr_t<\/span> base <span class=\"token operator\">&#061;<\/span> config<span class=\"token operator\">-&gt;<\/span>base<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_STATUS<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;<\/span><br \/>\n             COMPANY_UART_STATUS_TX_READY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token function\">sys_write32<\/span><span class=\"token punctuation\">(<\/span>c<span class=\"token punctuation\">,<\/span> base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_DATA<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4e8e\u662f&#xff1a;<\/p>\n<p><span class=\"token function\">uart_poll_out<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;A&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6700\u7ec8\u53d8\u6210&#xff1a;<\/p>\n<p>UART API<br \/>\n\u2193<br \/>\ncompany_uart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u2193<br \/>\nSTATUS<br \/>\n\u2193<br \/>\n\u7b49\u5f85 TX_READY<br \/>\n\u2193<br \/>\nDATA <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;A&#039;<\/span><\/p>\n<p>\u4e03\u3001\u4e3a\u4ec0\u4e48\u4f7f\u7528 sys_read32()&#xff1f;<\/p>\n<p>\u4e0d\u8981\u76f4\u63a5&#xff1a;<\/p>\n<p><span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">volatile<\/span> <span class=\"token class-name\">uint32_t<\/span> \\\\<span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> offset<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u867d\u7136\u5f88\u591a\u65f6\u5019\u4e5f\u80fd\u5de5\u4f5c\u3002 Zephyr Driver \u901a\u5e38\u4f7f\u7528&#xff1a;<\/p>\n<p><span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token function\">sys_write32<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u6216\u8005\u67d0\u4e9b\u60c5\u51b5\u4e0b&#xff1a;<\/p>\n<p><span class=\"token function\">sys_set_bit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token function\">sys_clear_bit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u539f\u56e0\u662f&#xff1a; Zephyr \u63d0\u4f9b\u4e86\u4e00\u5c42\u7edf\u4e00\u7684 MMIO \u8bbf\u95ee\u62bd\u8c61\u3002 \u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token class-name\">uint32_t<\/span> status<span class=\"token punctuation\">;<\/span><br \/>\nstatus <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_STATUS<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5199&#xff1a;<\/p>\n<p><span class=\"token function\">sys_write32<\/span><span class=\"token punctuation\">(<\/span>value<span class=\"token punctuation\">,<\/span> base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_DATA<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd9\u6837 Driver \u66f4\u7b26\u5408 Zephyr \u7684\u786c\u4ef6\u8bbf\u95ee\u6a21\u578b\u3002<\/p>\n<p>\u516b\u3001\u7b2c\u4e94\u6b65&#xff1a;\u5b9e\u73b0 poll_in()<\/p>\n<p>TX \u662f&#xff1a;<\/p>\n<p>CPU \u2192 UART \u2192 TX pin<\/p>\n<p>RX \u5219\u53cd\u8fc7\u6765&#xff1a;<\/p>\n<p>RX pin \u2192 UART \u2192 CPU<\/p>\n<p>\u5b9e\u73b0&#xff1a;<\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">company_uart_poll_in<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>c<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token operator\">*<\/span>config <span class=\"token operator\">&#061;<\/span><br \/>\n        dev<span class=\"token operator\">-&gt;<\/span>config<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">uintptr_t<\/span> base <span class=\"token operator\">&#061;<\/span> config<span class=\"token operator\">-&gt;<\/span>base<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_STATUS<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;<\/span><br \/>\n          COMPANY_UART_STATUS_RX_READY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token operator\">*<\/span>c <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_DATA<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u91cc&#xff1a;<\/p>\n<p><span class=\"token builtin class-name\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8868\u793a&#xff1a;<\/p>\n<p>\u6210\u529f\u6536\u5230\u4e00\u4e2a\u5b57\u7b26<\/p>\n<p>\u800c&#xff1a;<\/p>\n<p><span class=\"token builtin class-name\">return<\/span> -1<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8868\u793a&#xff1a;<\/p>\n<p>\u76ee\u524d\u6ca1\u6709\u6570\u636e<\/p>\n<p>\u5b9e\u9645 Driver \u4e2d\u901a\u5e38\u4f1a\u4f7f\u7528\u66f4\u5408\u9002\u7684 errno&#xff0c;\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token parameter variable\">-EAGAIN<\/span><\/p>\n<p>\u6240\u4ee5\u53ef\u4ee5\u5199\u6210&#xff1a;<\/p>\n<p><span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span>EAGAIN<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u4e5d\u3001\u7b2c\u516d\u6b65&#xff1a;\u5b9a\u4e49 Zephyr UART API<\/p>\n<p>\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u6709&#xff1a;<\/p>\n<p>company_uart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ncompany_uart_poll_in<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4f46\u662f Zephyr \u8fd8\u4e0d\u77e5\u9053\u5b83\u4eec\u662f UART API\u3002 \u6240\u4ee5\u5b9a\u4e49&#xff1a;<\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">uart_driver_api<\/span> company_uart_api <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>poll_in <span class=\"token operator\">&#061;<\/span> company_uart_poll_in<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>poll_out <span class=\"token operator\">&#061;<\/span> company_uart_poll_out<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd9\u4e00\u6b65\u975e\u5e38\u91cd\u8981\u3002 \u5b83\u5efa\u7acb&#xff1a;<\/p>\n<p>Zephyr UART API<br \/>\n       \u2502<br \/>\n       \u25bc<br \/>\ncompany_uart_api<br \/>\n       \u2502<br \/>\n       \u251c\u2500\u2500 poll_in<br \/>\n       \u2502<br \/>\n       \u2514\u2500\u2500 poll_out<\/p>\n<p>\u5341\u3001uart_poll_out() \u5230\u5e95\u53d1\u751f\u4e86\u4ec0\u4e48&#xff1f;<\/p>\n<p>\u5e94\u7528&#xff1a;<\/p>\n<p>uart_poll_out<span class=\"token punctuation\">(<\/span>uart, <span class=\"token string\">&#039;A&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Zephyr API \u5185\u90e8\u6700\u7ec8\u7c7b\u4f3c&#xff1a;<\/p>\n<p>dev-<span class=\"token operator\">&gt;<\/span>api-<span class=\"token operator\">&gt;<\/span>poll_out<span class=\"token punctuation\">(<\/span>dev, c<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>uart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u2502<br \/>\n\u25bc<br \/>\ndev-<span class=\"token operator\">&gt;<\/span>api<br \/>\n\u2502<br \/>\n\u25bc<br \/>\ncompany_uart_api<br \/>\n\u2502<br \/>\n\u25bc<br \/>\npoll_out<br \/>\n\u2502<br \/>\n\u25bc<br \/>\ncompany_uart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u8fd9\u5c31\u662f Zephyr Driver Model \u6700\u6838\u5fc3\u7684\u4e00\u5c42&#xff1a;<\/p>\n<p>struct device<br \/>\n\u2502<br \/>\n\u2514\u2500\u2500 api<br \/>\n\u2502<br \/>\n\u2514\u2500\u2500 <span class=\"token keyword\">function<\/span> pointers<\/p>\n<p>\u5341\u4e00\u3001\u7b2c\u4e03\u6b65&#xff1a;Driver Init<\/p>\n<p>\u63a5\u4e0b\u6765\u9700\u8981\u521d\u59cb\u5316 UART\u3002<\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">company_uart_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token operator\">*<\/span>config <span class=\"token operator\">&#061;<\/span><br \/>\n        dev<span class=\"token operator\">-&gt;<\/span>config<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">uintptr_t<\/span> base <span class=\"token operator\">&#061;<\/span> config<span class=\"token operator\">-&gt;<\/span>base<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/* enable UART *\/<\/span><br \/>\n    <span class=\"token function\">sys_write32<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_CTRL<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u771f\u5b9e SoC \u901a\u5e38\u4f1a\u590d\u6742\u5f97\u591a&#xff1a;<\/p>\n<p>UART init<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 <span class=\"token builtin class-name\">enable<\/span> clock<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 release reset<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 configure pinmux<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 configure baudrate<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 configure FIFO<br \/>\n\u2502<br \/>\n\u2514\u2500\u2500 <span class=\"token builtin class-name\">enable<\/span> UART<\/p>\n<p>\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u524d\u9762\u7684 BSP \u7ae0\u8282\u5fc5\u987b\u5148\u5b66&#xff1a;<\/p>\n<p>Clock<br \/>\nReset<br \/>\nPinmux<br \/>\nInterrupt Controller<br \/>\nDevicetree<\/p>\n<p>UART Driver \u53ea\u662f\u628a\u8fd9\u4e9b SoC \u57fa\u7840\u8bbe\u65bd\u771f\u6b63\u7ec4\u5408\u8d77\u6765\u3002<\/p>\n<p>\u5341\u4e8c\u3001\u7b2c\u516b\u6b65&#xff1a;\u4ece Devicetree \u83b7\u53d6 base address<\/p>\n<p>\u73b0\u5728\u8fdb\u5165\u975e\u5e38\u5173\u952e\u7684\u4e00\u6b65\u3002<\/p>\n<p>Devicetree&#xff1a;<\/p>\n<p>uart0<span class=\"token operator\">:<\/span> uart&#064;<span class=\"token number\">40000000<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    compatible <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;company,uart&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    reg <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token number\">0x40000000<\/span> <span class=\"token number\">0x1000<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    status <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;okay&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Driver \u4e0d\u5e94\u8be5\u518d\u5199&#xff1a;<\/p>\n<p><span class=\"token comment\"># define UART0_BASE 0x40000000<\/span><\/p>\n<p>\u800c\u5e94\u8be5&#xff1a;<\/p>\n<p>DT_INST_REG_ADDR<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">COMPANY_UART_CONFIG<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span>            <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n<span class=\"token expression\"><span class=\"token punctuation\">{<\/span>                                            <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token punctuation\">.<\/span>base <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">DT_INST_REG_ADDR<\/span><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>          <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n<span class=\"token expression\"><span class=\"token punctuation\">}<\/span><\/span><\/span><\/p>\n<p>\u7136\u540e&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">COMPANY_UART_CONFIG<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span>            <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n<span class=\"token expression\"><span class=\"token punctuation\">{<\/span>                                            <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token punctuation\">.<\/span>base <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">DT_INST_REG_ADDR<\/span><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>          <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n<span class=\"token expression\"><span class=\"token punctuation\">}<\/span><\/span><\/span><\/p>\n<p>\u6700\u7ec8&#xff1a;<\/p>\n<p>DT_INST_REG_ADDR<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u2193<br \/>\n0x40000000<br \/>\n\u2193<br \/>\nconfig_0.base<\/p>\n<p>\u5341\u4e09\u3001\u771f\u6b63\u91cd\u8981\u7684\u4e00\u70b9&#xff1a;DT_INST_*<\/p>\n<p>\u5982\u679c\u53ea\u6709&#xff1a;<\/p>\n<p>uart0<\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528&#xff1a;<\/p>\n<p>DT_NODELABEL<span class=\"token punctuation\">(<\/span>uart0<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4f46\u662f\u5199\u901a\u7528 Driver \u65f6&#xff0c;\u66f4\u63a8\u8350&#xff1a;<\/p>\n<p>DT_INST_REG_ADDR<span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u56e0\u4e3a Driver \u9700\u8981\u652f\u6301&#xff1a;<\/p>\n<p>instance <span class=\"token number\">0<\/span><br \/>\ninstance <span class=\"token number\">1<\/span><br \/>\ninstance <span class=\"token number\">2<\/span><\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>DT_INST<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span>, company_uart<span class=\"token punctuation\">)<\/span><br \/>\nDT_INST<span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span>, company_uart<span class=\"token punctuation\">)<\/span><br \/>\nDT_INST<span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span>, company_uart<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>DT_INST_FOREACH_STATUS_OKAY<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">..<\/span>.<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u5c31\u53ef\u4ee5\u81ea\u52a8\u751f\u6210&#xff1a;<\/p>\n<p>UART0<br \/>\nUART1<br \/>\nUART2<\/p>\n<p>\u8fd9\u548c\u6211\u4eec\u524d\u9762\u7684\u591a Device Instance \u7ae0\u8282\u5b8c\u5168\u8fde\u63a5\u8d77\u6765\u4e86\u3002<\/p>\n<p>\u5341\u56db\u3001\u7b2c\u4e5d\u6b65&#xff1a;\u751f\u6210 Device Instance<\/p>\n<p>\u73b0\u5728\u6211\u4eec\u53ef\u4ee5\u5199&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">COMPANY_UART_DEFINE<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span>                    <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n                                                     <span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span>          <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\">company_uart_config_<\/span><span class=\"token punctuation\">##<\/span><span class=\"token expression\">inst <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span>                   <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\"><span class=\"token punctuation\">.<\/span>base <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">DT_INST_REG_ADDR<\/span><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>              <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>                                                <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n                                                     <span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_data<\/span>                  <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\">company_uart_data_<\/span><span class=\"token punctuation\">##<\/span><span class=\"token expression\">inst<span class=\"token punctuation\">;<\/span>                        <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n                                                     <span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token function\">DEVICE_DT_INST_DEFINE<\/span><span class=\"token punctuation\">(<\/span>                            <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\">inst<span class=\"token punctuation\">,<\/span>                                         <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\">company_uart_init<span class=\"token punctuation\">,<\/span>                            <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\"><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span>                                         <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\"><span class=\"token operator\">&amp;<\/span>company_uart_data_<\/span><span class=\"token punctuation\">##<\/span><span class=\"token expression\">inst<span class=\"token punctuation\">,<\/span>                    <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\"><span class=\"token operator\">&amp;<\/span>company_uart_config_<\/span><span class=\"token punctuation\">##<\/span><span class=\"token expression\">inst<span class=\"token punctuation\">,<\/span>                  <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\">PRE_KERNEL_1<span class=\"token punctuation\">,<\/span>                                 <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\">CONFIG_SERIAL_INIT_PRIORITY<span class=\"token punctuation\">,<\/span>                  <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\"><span class=\"token operator\">&amp;<\/span>company_uart_api                            <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/span><\/span><\/p>\n<p>\u6700\u540e&#xff1a;<\/p>\n<p>DT_INST_FOREACH_STATUS_OKAY<span class=\"token punctuation\">(<\/span>COMPANY_UART_DEFINE<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4e8e\u662f Devicetree&#xff1a;<\/p>\n<p>uart0<br \/>\nuart1<br \/>\nuart2<\/p>\n<p>\u5c31\u4f1a\u751f\u6210&#xff1a;<\/p>\n<p>struct device uart0<br \/>\nstruct device uart1<br \/>\nstruct device uart2<\/p>\n<p>\u5341\u4e94\u3001\u5b8c\u6574 Driver \u9aa8\u67b6<\/p>\n<p>\u73b0\u5728\u628a\u524d\u9762\u7684\u4e1c\u897f\u653e\u5230\u4e00\u8d77\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>drivers\/serial\/company_uart.c<\/p>\n<p>\u6838\u5fc3\u7ed3\u6784&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/device.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/drivers\/uart.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/sys\/sys_io.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/dt-bindings\/dt-util.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_DATA<\/span>       <span class=\"token expression\"><span class=\"token number\">0x00<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_STATUS<\/span>     <span class=\"token expression\"><span class=\"token number\">0x04<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_CTRL<\/span>       <span class=\"token expression\"><span class=\"token number\">0x08<\/span><\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_STATUS_TX_READY<\/span> <span class=\"token expression\"><span class=\"token function\">BIT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_STATUS_RX_READY<\/span> <span class=\"token expression\"><span class=\"token function\">BIT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uintptr_t<\/span> base<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_data<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uint32_t<\/span> baudrate<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u7136\u540e&#xff1a;<\/p>\n<p>static void company_uart_poll_out<span class=\"token punctuation\">(<\/span><br \/>\n    const struct device *dev,<br \/>\n    unsigned char c<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    const struct company_uart_config *config <span class=\"token operator\">&#061;<\/span><br \/>\n        dev-<span class=\"token operator\">&gt;<\/span>config<span class=\"token punctuation\">;<\/span><\/p>\n<p>    uintptr_t base <span class=\"token operator\">&#061;<\/span> config-<span class=\"token operator\">&gt;<\/span>base<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token punctuation\">(<\/span>sys_read32<span class=\"token punctuation\">(<\/span>base &#043; COMPANY_UART_STATUS<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;<\/span><br \/>\n             COMPANY_UART_STATUS_TX_READY<span class=\"token punctuation\">))<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    sys_write32<span class=\"token punctuation\">(<\/span>c, base &#043; COMPANY_UART_DATA<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>RX&#xff1a;<\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">company_uart_poll_in<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>c<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token operator\">*<\/span>config <span class=\"token operator\">&#061;<\/span><br \/>\n        dev<span class=\"token operator\">-&gt;<\/span>config<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">uintptr_t<\/span> base <span class=\"token operator\">&#061;<\/span> config<span class=\"token operator\">-&gt;<\/span>base<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_STATUS<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;<\/span><br \/>\n          COMPANY_UART_STATUS_RX_READY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span>EAGAIN<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token operator\">*<\/span>c <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_DATA<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>API&#xff1a;<\/p>\n<p>static const struct uart_driver_api company_uart_api <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    .poll_in <span class=\"token operator\">&#061;<\/span> company_uart_poll_in,<br \/>\n    .poll_out <span class=\"token operator\">&#061;<\/span> company_uart_poll_out,<br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Init&#xff1a;<\/p>\n<p>static int company_uart_init<span class=\"token punctuation\">(<\/span>const struct device *dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    const struct company_uart_config *config <span class=\"token operator\">&#061;<\/span><br \/>\n        dev-<span class=\"token operator\">&gt;<\/span>config<span class=\"token punctuation\">;<\/span><\/p>\n<p>    uintptr_t base <span class=\"token operator\">&#061;<\/span> config-<span class=\"token operator\">&gt;<\/span>base<span class=\"token punctuation\">;<\/span><\/p>\n<p>    sys_write32<span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span>, base &#043; COMPANY_UART_CTRL<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token builtin class-name\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>Instance&#xff1a;<\/p>\n<p><span class=\"token comment\">#define COMPANY_UART_DEFINE(inst)                    \\\\<\/span><br \/>\n                                                     <span class=\"token punctuation\">\\\\<\/span><br \/>\n    static const struct company_uart_config          <span class=\"token punctuation\">\\\\<\/span><br \/>\n    company_uart_config_<span class=\"token comment\">##inst &#061; {                   \\\\<\/span><br \/>\n        .base <span class=\"token operator\">&#061;<\/span> DT_INST_REG_ADDR<span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span>,              <span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>                                                <span class=\"token punctuation\">\\\\<\/span><br \/>\n                                                     <span class=\"token punctuation\">\\\\<\/span><br \/>\n    static struct company_uart_data                  <span class=\"token punctuation\">\\\\<\/span><br \/>\n    company_uart_data_<span class=\"token comment\">##inst;                        \\\\<\/span><br \/>\n                                                     <span class=\"token punctuation\">\\\\<\/span><br \/>\n    DEVICE_DT_INST_DEFINE<span class=\"token punctuation\">(<\/span>                            <span class=\"token punctuation\">\\\\<\/span><br \/>\n        inst,                                         <span class=\"token punctuation\">\\\\<\/span><br \/>\n        company_uart_init,                            <span class=\"token punctuation\">\\\\<\/span><br \/>\n        NULL,                                         <span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token operator\">&amp;<\/span>company_uart_data_<span class=\"token comment\">##inst,                    \\\\<\/span><br \/>\n        <span class=\"token operator\">&amp;<\/span>company_uart_config_<span class=\"token comment\">##inst,                  \\\\<\/span><br \/>\n        PRE_KERNEL_1,                                 <span class=\"token punctuation\">\\\\<\/span><br \/>\n        CONFIG_SERIAL_INIT_PRIORITY,                  <span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token operator\">&amp;<\/span>company_uart_api                            <span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>DT_INST_FOREACH_STATUS_OKAY<span class=\"token punctuation\">(<\/span>COMPANY_UART_DEFINE<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u5341\u4e94\u70b9\u4e94\u3001\u5b8c\u6574 Driver \u6587\u4ef6\u7ed3\u6784\u8bf4\u660e<\/p>\n<p>\u4e0a\u9762\u7684\u9aa8\u67b6\u628a\u4ee3\u7801\u6309\u903b\u8f91\u62c6\u5f00\u8bb2\u89e3&#xff0c;\u4f46\u4e00\u4e2a\u771f\u5b9e\u7684 Driver \u6587\u4ef6\u5e94\u8be5\u600e\u4e48\u7ec4\u7ec7&#xff1f;\u4e0b\u9762\u7ed9\u51fa drivers\/serial\/company_uart.c \u7684\u5b8c\u6574\u6587\u4ef6\u7ed3\u6784&#xff0c;\u4ece\u6587\u4ef6\u5934\u90e8\u6ce8\u91ca\u5230\u51fd\u6570\u5b9e\u73b0\u987a\u5e8f&#xff0c;\u518d\u5230\u914d\u5957\u7684 Kconfig \u4e0e CMakeLists.txt\u3002<\/p>\n<p>1. \u6587\u4ef6\u5934\u90e8\u6ce8\u91ca<\/p>\n<p>\u6bcf\u4e2a Zephyr Driver \u6e90\u6587\u4ef6\u90fd\u5e94\u8be5\u4ee5 SPDX \u8bb8\u53ef\u8bc1\u6807\u8bc6\u5f00\u5934&#xff0c;\u5e76\u9644\u4e0a\u7b80\u8981\u8bf4\u660e&#xff1a;<\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * Copyright (c) 2026 Company<br \/>\n *<br \/>\n * SPDX-License-Identifier: Apache-2.0<br \/>\n *\/<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * Company SoC UART Driver<br \/>\n *<br \/>\n * Polling-mode UART driver for Company SoC.<br \/>\n * Supports UART0\/UART1\/UART2 via Devicetree instances.<br \/>\n *\/<\/span><\/p>\n<p>2. \u5305\u542b\u7684\u5934\u6587\u4ef6\u5217\u8868<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/device.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/drivers\/uart.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/sys\/sys_io.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/dt-bindings\/dt-util.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/kernel.h&gt;<\/span><\/span><\/p>\n<p>\u5404\u5934\u6587\u4ef6\u7684\u4f5c\u7528&#xff1a;<\/p>\n<table>\n<tr>\u5934\u6587\u4ef6\u4f5c\u7528<\/tr>\n<tbody>\n<tr>\n<td>zephyr\/device.h<\/td>\n<td>\u63d0\u4f9b struct device\u3001DEVICE_DT_INST_DEFINE() \u7b49\u8bbe\u5907\u6a21\u578b\u6838\u5fc3\u5b9a\u4e49<\/td>\n<\/tr>\n<tr>\n<td>zephyr\/drivers\/uart.h<\/td>\n<td>\u63d0\u4f9b uart_driver_api\u3001uart_poll_out() \u7b49 UART API \u5b9a\u4e49<\/td>\n<\/tr>\n<tr>\n<td>zephyr\/sys\/sys_io.h<\/td>\n<td>\u63d0\u4f9b sys_read32() \/ sys_write32() \u7b49 MMIO \u8bbf\u95ee\u63a5\u53e3<\/td>\n<\/tr>\n<tr>\n<td>zephyr\/dt-bindings\/dt-util.h<\/td>\n<td>\u63d0\u4f9b DT_INST_REG_ADDR() \u7b49 Devicetree \u5b8f<\/td>\n<\/tr>\n<tr>\n<td>zephyr\/kernel.h<\/td>\n<td>\u63d0\u4f9b BIT()\u3001CONFIG_SERIAL_INIT_PRIORITY \u7b49\u57fa\u7840\u5b9a\u4e49<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>3. \u5b8f\u5b9a\u4e49<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_DATA<\/span>       <span class=\"token expression\"><span class=\"token number\">0x00<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_STATUS<\/span>     <span class=\"token expression\"><span class=\"token number\">0x04<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_CTRL<\/span>       <span class=\"token expression\"><span class=\"token number\">0x08<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_BAUD<\/span>       <span class=\"token expression\"><span class=\"token number\">0x0C<\/span><\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_STATUS_TX_READY<\/span> <span class=\"token expression\"><span class=\"token function\">BIT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_STATUS_RX_READY<\/span> <span class=\"token expression\"><span class=\"token function\">BIT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><\/p>\n<p>\u5b8f\u5b9a\u4e49\u653e\u5728\u5934\u6587\u4ef6\u4e4b\u540e\u3001\u7ed3\u6784\u4f53\u4e4b\u524d&#xff0c;\u96c6\u4e2d\u7ba1\u7406\u5bc4\u5b58\u5668\u504f\u79fb\u548c\u72b6\u6001\u4f4d&#xff0c;\u907f\u514d\u9b54\u6cd5\u6570\u5b57\u6563\u843d\u5728\u51fd\u6570\u4e2d\u3002<\/p>\n<p>4. \u7ed3\u6784\u4f53\u5b9a\u4e49<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uintptr_t<\/span> base<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_data<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uint32_t<\/span> baudrate<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>config \u653e\u7f16\u8bd1\u65f6\u56fa\u5b9a\u7684\u786c\u4ef6\u4fe1\u606f&#xff08;base address&#xff09;&#xff0c;data \u653e\u8fd0\u884c\u65f6\u53ef\u53d8\u7684\u72b6\u6001&#xff08;baudrate&#xff09;\u3002<\/p>\n<p>5. \u51fd\u6570\u5b9e\u73b0\u987a\u5e8f<\/p>\n<p>\u4e00\u4e2a\u89c4\u8303\u7684 Driver \u6587\u4ef6&#xff0c;\u51fd\u6570\u6309\u4ee5\u4e0b\u987a\u5e8f\u6392\u5217&#xff1a;<\/p>\n<p>drivers\/serial\/company_uart.c<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 <span class=\"token number\">1<\/span>. \u5934\u6587\u4ef6<br \/>\n\u251c\u2500\u2500 <span class=\"token number\">2<\/span>. \u5b8f\u5b9a\u4e49<br \/>\n\u251c\u2500\u2500 <span class=\"token number\">3<\/span>. \u7ed3\u6784\u4f53\u5b9a\u4e49<br \/>\n\u251c\u2500\u2500 <span class=\"token number\">4<\/span>. \u9759\u6001\u51fd\u6570\u5b9e\u73b0<br \/>\n\u2502       \u251c\u2500\u2500 company_uart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u2502       \u251c\u2500\u2500 company_uart_poll_in<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u2502       \u2514\u2500\u2500 company_uart_init<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u251c\u2500\u2500 <span class=\"token number\">5<\/span>. uart_driver_api \u5b9e\u4f8b<br \/>\n\u2502       \u2514\u2500\u2500 company_uart_api<br \/>\n\u251c\u2500\u2500 <span class=\"token number\">6<\/span>. Device Instance \u751f\u6210\u5b8f<br \/>\n\u2502       \u2514\u2500\u2500 COMPANY_UART_DEFINE<span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><br \/>\n\u2514\u2500\u2500 <span class=\"token number\">7<\/span>. \u5b9e\u4f8b\u5c55\u5f00<br \/>\n        \u2514\u2500\u2500 DT_INST_FOREACH_STATUS_OKAY<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">..<\/span>.<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u987a\u5e8f\u539f\u5219&#xff1a;\u5148\u5b9a\u4e49\u3001\u540e\u4f7f\u7528\u3002poll_out() \/ poll_in() \u5148\u5b9e\u73b0&#xff0c;company_uart_api \u624d\u80fd\u5f15\u7528\u5b83\u4eec&#xff1b;company_uart_api \u5148\u5b9a\u4e49&#xff0c;DEVICE_DT_INST_DEFINE() \u624d\u80fd\u5f15\u7528\u5b83\u3002<\/p>\n<p>6. \u5bf9\u5e94\u7684 Kconfig \u914d\u7f6e<\/p>\n<p>\u5728 drivers\/serial\/Kconfig.company \u4e2d&#xff1a;<\/p>\n<p>config COMPANY_UART<br \/>\nbool &#034;Company SoC UART driver&#034;<br \/>\ndepends on DT_HAS_COMPANY_UART_ENABLED<br \/>\nhelp<br \/>\n  Enable the Company SoC UART driver.<br \/>\n  This driver provides polling-mode UART support.<\/p>\n<p>\u7136\u540e\u5728 drivers\/serial\/Kconfig \u4e2d\u5f15\u5165&#xff1a;<\/p>\n<p>source &#034;drivers\/serial\/Kconfig.company&#034;<\/p>\n<p>7. \u5bf9\u5e94\u7684 CMakeLists.txt \u914d\u7f6e<\/p>\n<p>\u5728 drivers\/serial\/CMakeLists.txt \u4e2d&#xff1a;<\/p>\n<p>zephyr_library_sources_ifdef(CONFIG_COMPANY_UART company_uart.c)<\/p>\n<p>\u8fd9\u6837&#xff0c;\u53ea\u6709\u5f53 CONFIG_COMPANY_UART&#061;y \u65f6&#xff0c;company_uart.c \u624d\u4f1a\u88ab\u7f16\u8bd1\u8fdb\u56fa\u4ef6\u3002<\/p>\n<p>8. \u5b8c\u6574\u6587\u4ef6\u7ed3\u6784\u4e00\u89c8<\/p>\n<p>drivers\/serial\/<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 company_uart.c          <span class=\"token comment\"># Driver \u5b9e\u73b0<\/span><br \/>\n\u251c\u2500\u2500 Kconfig.company         <span class=\"token comment\"># Driver \u7684 Kconfig \u914d\u7f6e<\/span><br \/>\n\u2514\u2500\u2500 CMakeLists.txt          <span class=\"token comment\"># \u6784\u5efa\u914d\u7f6e&#xff08;\u8ffd\u52a0\u4e00\u884c&#xff09;<\/span><\/p>\n<p>\u8fd9\u5c31\u662f\u4e00\u4e2a Zephyr Driver \u6587\u4ef6\u7684\u5b8c\u6574\u7ec4\u7ec7\u65b9\u5f0f&#xff1a;\u6e90\u6587\u4ef6\u8d1f\u8d23\u5b9e\u73b0&#xff0c;Kconfig \u8d1f\u8d23\u5f00\u5173&#xff0c;CMakeLists.txt \u8d1f\u8d23\u7f16\u8bd1&#xff0c;\u4e09\u8005\u914d\u5408\u624d\u80fd\u8ba9 Driver \u771f\u6b63\u8fdb\u5165 Zephyr \u6784\u5efa\u7cfb\u7edf\u3002<\/p>\n<p>\u8fd9\u5df2\u7ecf\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684 Company SoC UART Driver \u6700\u5c0f\u9aa8\u67b6\u3002<\/p>\n<p>\u5341\u516d\u3001\u5b83\u548c\u7b2c 27 \u7bc7 Binding \u5230\u5e95\u600e\u4e48\u8fde\u63a5&#xff1f;<\/p>\n<p>\u7b2c 27 \u7bc7&#xff1a;<\/p>\n<p>Binding<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>compatible: <span class=\"token string\">&#034;company,uart&#034;<\/span><\/p>\n<p>properties:<br \/>\n  reg:<br \/>\n    required: <span class=\"token boolean\">true<\/span><\/p>\n<p>  interrupts:<br \/>\n    required: <span class=\"token boolean\">true<\/span><\/p>\n<p>Devicetree&#xff1a;<\/p>\n<p>uart0<span class=\"token operator\">:<\/span> uart&#064;<span class=\"token number\">40000000<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    compatible <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;company,uart&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    reg <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token number\">0x40000000<\/span> <span class=\"token number\">0x1000<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    interrupts <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token number\">5<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    status <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;okay&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Driver&#xff1a;<\/p>\n<p><span class=\"token function\">DT_INST_REG_ADDR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4e8e\u662f&#xff1a;<\/p>\n<p><span class=\"token string\">&#034;company,uart&#034;<\/span><br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nBinding<br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nDevicetree <span class=\"token function\">node<\/span><br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nDT_INST<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span>, company_uart<span class=\"token punctuation\">)<\/span><br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nDT_INST_REG_ADDR<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\n0x40000000<br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\ncompany_uart_config_0<br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nstruct device<br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nuart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u8fd9\u5c31\u662f\u5b8c\u6574\u95ed\u73af\u3002<\/p>\n<p>\u5341\u4e03\u3001\u4f46\u662f\u73b0\u5728\u6709\u4e00\u4e2a&#034;\u5751&#034;<\/p>\n<p>\u4e0a\u9762\u7684 Driver&#xff1a;<\/p>\n<p>struct company_uart_config <span class=\"token punctuation\">{<\/span><br \/>\n    uintptr_t base<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u53ea\u4f7f\u7528\u4e86&#xff1a;<\/p>\n<p>reg<\/p>\n<p>\u4f46\u662f Devicetree \u8fd8\u6709&#xff1a;<\/p>\n<p>interrupts <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token operator\"><span class=\"token file-descriptor important\">5<\/span>&gt;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u76ee\u524d\u5b8c\u5168\u6ca1\u6709\u4f7f\u7528\u3002 \u4e3a\u4ec0\u4e48&#xff1f; \u56e0\u4e3a\u6211\u4eec\u73b0\u5728\u5b9e\u73b0\u7684\u662f&#xff1a; Polling UART \u800c\u4e0d\u662f&#xff1a; Interrupt-driven UART \u6240\u4ee5&#xff1a;<\/p>\n<p>polling driver<\/p>\n<p>CPU<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 \u68c0\u67e5 TX_READY<br \/>\n\u251c\u2500\u2500 \u7b49\u5f85<br \/>\n\u251c\u2500\u2500 \u5199 DATA<br \/>\n\u2514\u2500\u2500 \u8fd4\u56de<\/p>\n<p>\u4e0d\u9700\u8981 IRQ\u3002<\/p>\n<p>\u6240\u4ee5&#xff1a; Devicetree \u63cf\u8ff0&#034;\u786c\u4ef6\u5728\u54ea\u91cc\u3001\u6709\u4ec0\u4e48\u8d44\u6e90&#034;&#xff1b;Driver \u63cf\u8ff0&#034;\u5982\u4f55\u64cd\u4f5c\u8fd9\u4e2a\u786c\u4ef6&#034;&#xff1b;struct device \u628a\u4e24\u8005\u8fde\u63a5\u8d77\u6765&#xff1b;Zephyr API \u5219\u8ba9\u5e94\u7528\u7a0b\u5e8f\u4e0d\u9700\u8981\u77e5\u9053 Company UART \u7684\u5bc4\u5b58\u5668\u7ec6\u8282\u3002<\/p>\n<p>\u5341\u516b\u3001Polling \u4e0e Interrupt \u6a21\u5f0f\u5bf9\u6bd4<\/p>\n<p>\u65e2\u7136\u5f53\u524d\u5b9e\u73b0\u7684\u662f Polling UART&#xff0c;\u800c Devicetree \u4e2d\u5df2\u7ecf\u58f0\u660e\u4e86 interrupts &#061; &lt;5&gt;&#xff0c;\u90a3\u4e48\u5f88\u81ea\u7136\u4f1a\u4ea7\u751f\u4e00\u4e2a\u95ee\u9898&#xff1a;\u4e3a\u4ec0\u4e48\u4e0d\u7528\u4e2d\u65ad&#xff1f; \u8981\u56de\u7b54\u8fd9\u4e2a\u95ee\u9898&#xff0c;\u5148\u8981\u7406\u89e3 Polling \u4e0e Interrupt \u4e24\u79cd\u6a21\u5f0f\u5728\u672c\u8d28\u4e0a\u7684\u5dee\u5f02\u3002<\/p>\n<table>\n<tr>\u7ef4\u5ea6Polling \u6a21\u5f0fInterrupt \u6a21\u5f0f<\/tr>\n<tbody>\n<tr>\n<td>CPU \u5360\u7528<\/td>\n<td>\u9ad8\u3002CPU \u5fc5\u987b\u6301\u7eed\u8f6e\u8be2 STATUS \u5bc4\u5b58\u5668&#xff0c;\u7b49\u5f85 TX_READY \/ RX_READY&#xff0c;\u671f\u95f4\u65e0\u6cd5\u505a\u5176\u4ed6\u4e8b\u60c5<\/td>\n<td>\u4f4e\u3002CPU \u53ea\u5728\u6570\u636e\u5c31\u7eea\u65f6\u88ab\u4e2d\u65ad\u5524\u9192&#xff0c;\u5176\u4f59\u65f6\u95f4\u53ef\u4ee5\u6267\u884c\u5176\u4ed6\u4efb\u52a1\u6216\u8fdb\u5165\u4f4e\u529f\u8017<\/td>\n<\/tr>\n<tr>\n<td>\u5b9e\u65f6\u6027<\/td>\n<td>\u5dee\u3002\u54cd\u5e94\u5ef6\u8fdf\u53d6\u51b3\u4e8e\u8f6e\u8be2\u9891\u7387&#xff0c;\u6570\u636e\u5230\u8fbe\u540e\u53ef\u80fd\u65e0\u6cd5\u88ab\u53ca\u65f6\u5904\u7406<\/td>\n<td>\u597d\u3002\u786c\u4ef6\u4e8b\u4ef6\u7acb\u5373\u89e6\u53d1\u4e2d\u65ad&#xff0c;CPU \u53ef\u4ee5\u7b2c\u4e00\u65f6\u95f4\u54cd\u5e94<\/td>\n<\/tr>\n<tr>\n<td>\u4ee3\u7801\u590d\u6742\u5ea6<\/td>\n<td>\u4f4e\u3002\u53ea\u9700 poll_out() \/ poll_in() \u4e24\u4e2a\u51fd\u6570&#xff0c;\u65e0\u9700\u6ce8\u518c IRQ\u3001\u7f16\u5199 ISR<\/td>\n<td>\u9ad8\u3002\u9700\u8981\u6ce8\u518c IRQ\u3001\u7f16\u5199 ISR\u3001\u5904\u7406\u4e2d\u65ad\u6807\u5fd7\u3001\u7ba1\u7406\u73af\u5f62\u7f13\u51b2\u533a&#xff0c;\u8fd8\u8981\u8003\u8651\u5e76\u53d1\u4e0e\u9501<\/td>\n<\/tr>\n<tr>\n<td>\u9002\u7528\u573a\u666f<\/td>\n<td>\u8c03\u8bd5\u3001\u7b80\u5355\u6570\u636e\u53d1\u9001\u3001\u4f4e\u901f\u7387\u3001\u5bf9 CPU \u5360\u7528\u4e0d\u654f\u611f\u7684\u573a\u666f<\/td>\n<td>\u9ad8\u901f\u7387\u901a\u4fe1\u3001\u957f\u65f6\u95f4\u8fd0\u884c\u3001\u9700\u8981\u4f4e\u529f\u8017\u6216\u9ad8\u5b9e\u65f6\u6027\u7684\u4ea7\u54c1\u7ea7\u573a\u666f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u7528\u4e00\u53e5\u8bdd\u6982\u62ec&#xff1a;<\/p>\n<p>Polling \u7528 CPU \u65f6\u95f4\u6362\u4ee3\u7801\u7b80\u5355&#xff1b;Interrupt \u7528\u4ee3\u7801\u590d\u6742\u5ea6\u6362 CPU \u65f6\u95f4\u3002<\/p>\n<p>\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u5f53\u524d\u8fd9\u4e00\u7bc7\u5148\u5b9e\u73b0 Polling \u6a21\u5f0f\u2014\u2014\u5b83\u8db3\u591f\u7b80\u5355&#xff0c;\u80fd\u8ba9\u6211\u4eec\u628a\u6ce8\u610f\u529b\u96c6\u4e2d\u5728 Zephyr Driver Model \u7684\u6838\u5fc3\u95ed\u73af \u4e0a&#xff0c;\u800c\u4e0d\u88ab\u4e2d\u65ad\u5904\u7406\u7684\u7ec6\u8282\u5e72\u6270\u3002<\/p>\n<p>\u5341\u4e5d\u3001\u5982\u4f55\u4ece\u5f53\u524d\u9aa8\u67b6\u6269\u5c55\u4e3a\u4e2d\u65ad\u9a71\u52a8 UART<\/p>\n<p>\u7406\u89e3\u4e86\u4e24\u79cd\u6a21\u5f0f\u7684\u5dee\u5f02\u4e4b\u540e&#xff0c;\u540e\u7eed\u6587\u7ae0\u5c06\u57fa\u4e8e\u73b0\u6709\u7684\u6700\u5c0f\u9aa8\u67b6&#xff0c;\u9010\u6b65\u628a\u5b83\u6269\u5c55\u4e3a\u4e2d\u65ad\u9a71\u52a8 UART\u3002\u6269\u5c55\u8def\u5f84\u5927\u81f4\u5982\u4e0b&#xff1a;<\/p>\n<p>\u5f53\u524d\u9aa8\u67b6&#xff08;Polling&#xff09;<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 <span class=\"token number\">1<\/span>. \u5728 config \u4e2d\u589e\u52a0 irq \u5b57\u6bb5<br \/>\n\u2502       .irq <span class=\"token operator\">&#061;<\/span> DT_INST_IRQN<span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 <span class=\"token number\">2<\/span>. \u5728 init<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> \u4e2d\u6ce8\u518c ISR<br \/>\n\u2502       IRQ_CONNECT<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">..<\/span>.<span class=\"token punctuation\">)<\/span><br \/>\n\u2502       irq_enable<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">..<\/span>.<span class=\"token punctuation\">)<\/span><br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 <span class=\"token number\">3<\/span>. \u5b9e\u73b0 ISR<br \/>\n\u2502       company_uart_isr<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u2502       \u251c\u2500\u2500 \u8bfb\u53d6 STATUS<br \/>\n\u2502       \u251c\u2500\u2500 \u5224\u65ad RX_READY<br \/>\n\u2502       \u251c\u2500\u2500 \u8bfb\u53d6 DATA<br \/>\n\u2502       \u2514\u2500\u2500 \u5199\u5165\u73af\u5f62\u7f13\u51b2\u533a<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 <span class=\"token number\">4<\/span>. \u5728 data \u4e2d\u589e\u52a0\u73af\u5f62\u7f13\u51b2\u533a<br \/>\n\u2502       struct company_uart_data <span class=\"token punctuation\">{<\/span><br \/>\n\u2502           uint32_t baudrate<span class=\"token punctuation\">;<\/span><br \/>\n\u2502           uint8_t rx_buf<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">..<\/span>.<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u2502           <span class=\"token punctuation\">..<\/span>.<br \/>\n\u2502       <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u2502<br \/>\n\u2514\u2500\u2500 <span class=\"token number\">5<\/span>. \u5728 uart_driver_api \u4e2d\u8865\u5145<br \/>\n        .irq_callback_set<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">..<\/span>.<span class=\"token punctuation\">)<\/span><br \/>\n        .irq_is_pending<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">..<\/span>.<span class=\"token punctuation\">)<\/span><br \/>\n        .irq_update<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">..<\/span>.<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u5176\u4e2d\u6700\u5173\u952e\u7684\u4e00\u6b65&#xff0c;\u662f\u628a Devicetree \u4e2d\u76ee\u524d&#034;\u95f2\u7f6e&#034;\u7684 interrupts &#061; &lt;5&gt; \u771f\u6b63\u7528\u8d77\u6765&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">COMPANY_UART_CONFIG<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span>                    <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n<span class=\"token expression\"><span class=\"token punctuation\">{<\/span>                                                    <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token punctuation\">.<\/span>base <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">DT_INST_REG_ADDR<\/span><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>                  <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token punctuation\">.<\/span>irq  <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">DT_INST_IRQN<\/span><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>                      <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n<span class=\"token expression\"><span class=\"token punctuation\">}<\/span><\/span><\/span><\/p>\n<p>\u8fd9\u6837&#xff0c;interrupts &#061; &lt;5&gt; \u5c31\u4f1a\u901a\u8fc7 DT_INST_IRQN(0) \u53d8\u6210 config_0.irq &#061; 5&#xff0c;\u518d\u914d\u5408 IRQ_CONNECT() \u4e0e irq_enable()&#xff0c;\u5c31\u80fd\u8ba9 UART \u5728\u6570\u636e\u5230\u8fbe\u65f6\u4e3b\u52a8\u901a\u77e5 CPU&#xff0c;\u800c\u4e0d\u518d\u9700\u8981 CPU \u53cd\u590d\u8f6e\u8be2\u3002<\/p>\n<p>\u5230\u90a3\u65f6&#xff0c;Polling \u4e0e Interrupt \u4e24\u79cd\u6a21\u5f0f\u4f1a\u5171\u5b58\u4e8e\u540c\u4e00\u4e2a Driver \u4e2d&#xff1a;poll_out() \/ poll_in() \u4fdd\u7559\u7528\u4e8e\u8c03\u8bd5\u548c\u7b80\u5355\u573a\u666f&#xff0c;\u4e2d\u65ad\u8def\u5f84\u5219\u8d1f\u8d23\u4ea7\u54c1\u7ea7\u7684\u9ad8\u901f\u6536\u53d1\u3002\u8fd9\u4e5f\u6b63\u662f Zephyr \u4e2d\u8bb8\u591a\u771f\u5b9e UART Driver \u7684\u6700\u7ec8\u5f62\u6001\u3002<\/p>\n<p>\u4e8c\u5341\u3001\u5b8c\u6574\u7684\u4e2d\u65ad\u9a71\u52a8 UART \u4ee3\u7801\u793a\u4f8b<\/p>\n<p>\u4e0a\u4e00\u8282\u7ed9\u51fa\u4e86\u6269\u5c55\u8def\u5f84&#xff0c;\u8fd9\u4e00\u8282\u6211\u4eec\u628a\u5b83\u771f\u6b63\u843d\u5730\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u4e2d\u65ad\u9a71\u52a8 UART Driver&#xff0c;\u5b83\u5728\u524d\u9762\u7684 Polling \u9aa8\u67b6\u57fa\u7840\u4e0a&#xff0c;\u589e\u52a0\u4e86 IRQ \u6ce8\u518c\u3001ISR \u5b9e\u73b0\u548c\u73af\u5f62\u7f13\u51b2\u533a\u7ba1\u7406\u3002<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/device.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/drivers\/uart.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/sys\/sys_io.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/sys\/ring_buffer.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/dt-bindings\/dt-util.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/irq.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_DATA<\/span>       <span class=\"token expression\"><span class=\"token number\">0x00<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_STATUS<\/span>     <span class=\"token expression\"><span class=\"token number\">0x04<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_CTRL<\/span>       <span class=\"token expression\"><span class=\"token number\">0x08<\/span><\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_STATUS_TX_READY<\/span> <span class=\"token expression\"><span class=\"token function\">BIT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_STATUS_RX_READY<\/span> <span class=\"token expression\"><span class=\"token function\">BIT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">COMPANY_UART_RX_BUF_SIZE<\/span> <span class=\"token expression\"><span class=\"token number\">256<\/span><\/span><\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uintptr_t<\/span> base<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">uint32_t<\/span> irq<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_data<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uint32_t<\/span> baudrate<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">uint8_t<\/span> rx_buf<span class=\"token punctuation\">[<\/span>COMPANY_UART_RX_BUF_SIZE<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">ring_buf<\/span> rx_ring<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">uart_irq_callback_user_data_t<\/span> callback<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span>callback_data<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>1. \u5728 init() \u4e2d\u6ce8\u518c IRQ \u5e76\u542f\u7528\u4e2d\u65ad<\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">company_uart_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token operator\">*<\/span>config <span class=\"token operator\">&#061;<\/span><br \/>\n        dev<span class=\"token operator\">-&gt;<\/span>config<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_data<\/span> <span class=\"token operator\">*<\/span>data <span class=\"token operator\">&#061;<\/span> dev<span class=\"token operator\">-&gt;<\/span>data<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">uintptr_t<\/span> base <span class=\"token operator\">&#061;<\/span> config<span class=\"token operator\">-&gt;<\/span>base<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/* \u521d\u59cb\u5316\u73af\u5f62\u7f13\u51b2\u533a *\/<\/span><br \/>\n    <span class=\"token function\">ring_buf_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>data<span class=\"token operator\">-&gt;<\/span>rx_ring<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token operator\">-&gt;<\/span>rx_buf<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                  data<span class=\"token operator\">-&gt;<\/span>rx_buf<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/* \u4f7f\u80fd UART *\/<\/span><br \/>\n    <span class=\"token function\">sys_write32<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_CTRL<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/* \u4f7f\u80fd UART \u63a5\u6536\u4e2d\u65ad&#xff08;\u5047\u8bbe CTRL bit 1 &#061; RX_IE&#xff09; *\/<\/span><br \/>\n    <span class=\"token function\">sys_write32<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_CTRL<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">|<\/span> <span class=\"token function\">BIT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_CTRL<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/* \u6ce8\u518c ISR \u5e76\u542f\u7528\u4e2d\u65ad *\/<\/span><br \/>\n    <span class=\"token function\">IRQ_CONNECT<\/span><span class=\"token punctuation\">(<\/span>config<span class=\"token operator\">-&gt;<\/span>irq<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> company_uart_isr<span class=\"token punctuation\">,<\/span><br \/>\n                dev<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">irq_enable<\/span><span class=\"token punctuation\">(<\/span>config<span class=\"token operator\">-&gt;<\/span>irq<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>2. \u5b9e\u73b0 ISR<\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">company_uart_isr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token operator\">*<\/span>config <span class=\"token operator\">&#061;<\/span><br \/>\n        dev<span class=\"token operator\">-&gt;<\/span>config<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_data<\/span> <span class=\"token operator\">*<\/span>data <span class=\"token operator\">&#061;<\/span> dev<span class=\"token operator\">-&gt;<\/span>data<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">uintptr_t<\/span> base <span class=\"token operator\">&#061;<\/span> config<span class=\"token operator\">-&gt;<\/span>base<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/* \u53ea\u8981 RX \u6709\u6570\u636e\u5c31\u6301\u7eed\u8bfb\u53d6 *\/<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_STATUS<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;<\/span><br \/>\n           COMPANY_UART_STATUS_RX_READY<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">uint8_t<\/span> c <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">sys_read32<\/span><span class=\"token punctuation\">(<\/span>base <span class=\"token operator\">&#043;<\/span> COMPANY_UART_DATA<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/* \u5199\u5165\u73af\u5f62\u7f13\u51b2\u533a&#xff0c;\u6ee1\u5219\u4e22\u5f03 *\/<\/span><br \/>\n        <span class=\"token function\">ring_buf_put<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>data<span class=\"token operator\">-&gt;<\/span>rx_ring<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>c<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/* \u901a\u77e5\u4e0a\u5c42\u5e94\u7528\u6709\u6570\u636e\u5230\u8fbe *\/<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>data<span class=\"token operator\">-&gt;<\/span>callback<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        data<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">callback<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">,<\/span> data<span class=\"token operator\">-&gt;<\/span>callback_data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>3. \u5728 uart_driver_api \u4e2d\u8865\u5145\u4e2d\u65ad\u76f8\u5173\u56de\u8c03<\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">company_uart_irq_update<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">company_uart_irq_is_pending<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">company_uart_irq_enable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token operator\">*<\/span>config <span class=\"token operator\">&#061;<\/span><br \/>\n        dev<span class=\"token operator\">-&gt;<\/span>config<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">irq_enable<\/span><span class=\"token punctuation\">(<\/span>config<span class=\"token operator\">-&gt;<\/span>irq<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">company_uart_irq_disable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span> <span class=\"token operator\">*<\/span>config <span class=\"token operator\">&#061;<\/span><br \/>\n        dev<span class=\"token operator\">-&gt;<\/span>config<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">irq_disable<\/span><span class=\"token punctuation\">(<\/span>config<span class=\"token operator\">-&gt;<\/span>irq<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">company_uart_irq_callback_set<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token class-name\">uart_irq_callback_user_data_t<\/span> callback<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span>user_data<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_data<\/span> <span class=\"token operator\">*<\/span>data <span class=\"token operator\">&#061;<\/span> dev<span class=\"token operator\">-&gt;<\/span>data<span class=\"token punctuation\">;<\/span><\/p>\n<p>    data<span class=\"token operator\">-&gt;<\/span>callback <span class=\"token operator\">&#061;<\/span> callback<span class=\"token punctuation\">;<\/span><br \/>\n    data<span class=\"token operator\">-&gt;<\/span>callback_data <span class=\"token operator\">&#061;<\/span> user_data<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">uart_driver_api<\/span> company_uart_api <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>poll_in <span class=\"token operator\">&#061;<\/span> company_uart_poll_in<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>poll_out <span class=\"token operator\">&#061;<\/span> company_uart_poll_out<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>irq_callback_set <span class=\"token operator\">&#061;<\/span> company_uart_irq_callback_set<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>irq_update <span class=\"token operator\">&#061;<\/span> company_uart_irq_update<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>irq_is_pending <span class=\"token operator\">&#061;<\/span> company_uart_irq_is_pending<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>irq_enable <span class=\"token operator\">&#061;<\/span> company_uart_irq_enable<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>irq_disable <span class=\"token operator\">&#061;<\/span> company_uart_irq_disable<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>4. \u5728 config \u4e2d\u901a\u8fc7 DT_INST_IRQN() \u83b7\u53d6 IRQ<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">COMPANY_UART_CONFIG<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span>                    <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n<span class=\"token expression\"><span class=\"token punctuation\">{<\/span>                                                    <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token punctuation\">.<\/span>base <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">DT_INST_REG_ADDR<\/span><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>                  <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token punctuation\">.<\/span>irq  <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">DT_INST_IRQN<\/span><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>                      <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n<span class=\"token expression\"><span class=\"token punctuation\">}<\/span><\/span><\/span><\/p>\n<p>5. \u751f\u6210 Device Instance<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">COMPANY_UART_DEFINE<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span>                    <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n                                                     <span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_config<\/span>          <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\">company_uart_config_<\/span><span class=\"token punctuation\">##<\/span><span class=\"token expression\">inst <span class=\"token operator\">&#061;<\/span>                     <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\"><span class=\"token function\">COMPANY_UART_CONFIG<\/span><span class=\"token punctuation\">(<\/span>inst<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                   <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n                                                     <span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">company_uart_data<\/span>                  <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\">company_uart_data_<\/span><span class=\"token punctuation\">##<\/span><span class=\"token expression\">inst<span class=\"token punctuation\">;<\/span>                        <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n                                                     <span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token function\">DEVICE_DT_INST_DEFINE<\/span><span class=\"token punctuation\">(<\/span>                            <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\">inst<span class=\"token punctuation\">,<\/span>                                         <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\">company_uart_init<span class=\"token punctuation\">,<\/span>                            <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\"><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span>                                         <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\"><span class=\"token operator\">&amp;<\/span>company_uart_data_<\/span><span class=\"token punctuation\">##<\/span><span class=\"token expression\">inst<span class=\"token punctuation\">,<\/span>                    <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\"><span class=\"token operator\">&amp;<\/span>company_uart_config_<\/span><span class=\"token punctuation\">##<\/span><span class=\"token expression\">inst<span class=\"token punctuation\">,<\/span>                  <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\">PRE_KERNEL_1<span class=\"token punctuation\">,<\/span>                                 <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\">CONFIG_SERIAL_INIT_PRIORITY<span class=\"token punctuation\">,<\/span>                  <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n        <span class=\"token expression\"><span class=\"token operator\">&amp;<\/span>company_uart_api                            <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n    <span class=\"token expression\"><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/span><\/span><\/p>\n<p><span class=\"token function\">DT_INST_FOREACH_STATUS_OKAY<\/span><span class=\"token punctuation\">(<\/span>COMPANY_UART_DEFINE<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4e8c\u5341\u4e00\u3001\u4e0e Polling \u9aa8\u67b6\u7684\u5bf9\u6bd4<\/p>\n<p>\u628a\u4e0a\u9762\u7684\u4e2d\u65ad\u9a71\u52a8\u7248\u672c\u548c\u7b2c\u5341\u4e94\u8282\u7684 Polling \u9aa8\u67b6\u653e\u5728\u4e00\u8d77&#xff0c;\u5dee\u5f02\u4e00\u76ee\u4e86\u7136&#xff1a;<\/p>\n<table>\n<tr>\u5bf9\u6bd4\u9879Polling \u9aa8\u67b6\u4e2d\u65ad\u9a71\u52a8\u7248\u672c<\/tr>\n<tbody>\n<tr>\n<td>config \u5b57\u6bb5<\/td>\n<td>\u53ea\u6709 base<\/td>\n<td>base &#043; irq&#xff08;\u901a\u8fc7 DT_INST_IRQN() \u83b7\u53d6&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>data \u5b57\u6bb5<\/td>\n<td>\u53ea\u6709 baudrate<\/td>\n<td>baudrate &#043; \u73af\u5f62\u7f13\u51b2\u533a &#043; \u56de\u8c03\u6307\u9488<\/td>\n<\/tr>\n<tr>\n<td>init()<\/td>\n<td>\u53ea\u4f7f\u80fd UART<\/td>\n<td>\u521d\u59cb\u5316\u73af\u5f62\u7f13\u51b2\u533a &#043; \u4f7f\u80fd UART &#043; IRQ_CONNECT() &#043; irq_enable()<\/td>\n<\/tr>\n<tr>\n<td>\u63a5\u6536\u65b9\u5f0f<\/td>\n<td>poll_in() \u4e3b\u52a8\u67e5\u8be2 STATUS<\/td>\n<td>ISR \u5728\u6570\u636e\u5230\u8fbe\u65f6\u81ea\u52a8\u8bfb\u53d6\u5e76\u5199\u5165\u73af\u5f62\u7f13\u51b2\u533a<\/td>\n<\/tr>\n<tr>\n<td>\u6570\u636e\u6682\u5b58<\/td>\n<td>\u65e0&#xff0c;\u8bfb\u4e0d\u5230\u5c31\u8fd4\u56de -EAGAIN<\/td>\n<td>\u73af\u5f62\u7f13\u51b2\u533a\u6682\u5b58&#xff0c;\u5e94\u7528\u53ef\u7a0d\u540e\u8bfb\u53d6<\/td>\n<\/tr>\n<tr>\n<td>API \u56de\u8c03<\/td>\n<td>\u53ea\u6709 poll_in \/ poll_out<\/td>\n<td>\u589e\u52a0 irq_callback_set \/ irq_update \/ irq_is_pending \/ irq_enable \/ irq_disable<\/td>\n<\/tr>\n<tr>\n<td>CPU \u5360\u7528<\/td>\n<td>\u9ad8&#xff0c;\u9700\u6301\u7eed\u8f6e\u8be2<\/td>\n<td>\u4f4e&#xff0c;\u4ec5\u5728\u6570\u636e\u5230\u8fbe\u65f6\u88ab\u5524\u9192<\/td>\n<\/tr>\n<tr>\n<td>\u4ee3\u7801\u91cf<\/td>\n<td>\u7ea6 100 \u884c<\/td>\n<td>\u7ea6 200 \u884c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6838\u5fc3\u5dee\u5f02\u53ef\u4ee5\u6982\u62ec\u4e3a\u4e00\u53e5\u8bdd&#xff1a;<\/p>\n<p>Polling \u9aa8\u67b6\u662f&#034;CPU \u4e3b\u52a8\u53bb\u95ee\u786c\u4ef6\u6709\u6ca1\u6709\u6570\u636e&#034;&#xff1b;\u4e2d\u65ad\u9a71\u52a8\u7248\u672c\u662f&#034;\u786c\u4ef6\u4e3b\u52a8\u544a\u8bc9 CPU \u6709\u6570\u636e\u4e86&#034;\u3002<\/p>\n<p>\u73af\u5f62\u7f13\u51b2\u533a\u5728\u8fd9\u91cc\u626e\u6f14\u4e86\u5173\u952e\u89d2\u8272&#xff1a;ISR \u8fd0\u884c\u5728\u4e2d\u65ad\u4e0a\u4e0b\u6587&#xff0c;\u4e0d\u80fd\u957f\u65f6\u95f4\u963b\u585e&#xff0c;\u6240\u4ee5\u5b83\u628a\u6536\u5230\u7684\u5b57\u8282\u5feb\u901f\u5199\u5165\u73af\u5f62\u7f13\u51b2\u533a\u5c31\u7acb\u5373\u8fd4\u56de&#xff1b;\u5e94\u7528\u7a0b\u5e8f\u5728\u81ea\u5df1\u7684\u4e0a\u4e0b\u6587\u91cc\u901a\u8fc7 uart_fifo_read() \u6216\u76f4\u63a5\u8bfb\u53d6 data-&gt;rx_ring \u6765\u6d88\u8d39\u6570\u636e\u3002\u8fd9\u6837 ISR \u4e0e\u5e94\u7528\u4e4b\u95f4\u901a\u8fc7\u7f13\u51b2\u533a\u89e3\u8026&#xff0c;\u65e2\u4e0d\u4f1a\u4e22\u6570\u636e&#xff0c;\u4e5f\u4e0d\u4f1a\u963b\u585e\u4e2d\u65ad\u5904\u7406\u3002<\/p>\n<p>\u8fd9\u5c31\u662f\u4ece Polling \u9aa8\u67b6\u8d70\u5411\u4e2d\u65ad\u9a71\u52a8 UART \u7684\u5b8c\u6574\u843d\u5730\u8fc7\u7a0b\u3002\u540e\u7eed\u6587\u7ae0\u4f1a\u8fdb\u4e00\u6b65\u8ba8\u8bba FIFO \u6df1\u5ea6\u3001\u6d41\u63a7\u3001DMA \u4ee5\u53ca\u591a\u5b9e\u4f8b\u4e0b\u7684 ISR \u53c2\u6570\u4f20\u9012\u7b49\u8fdb\u9636\u8bdd\u9898\u3002<\/p>\n<p>\u4e8c\u5341\u4e8c\u3001\u5982\u4f55\u9a8c\u8bc1 Driver \u662f\u5426\u5de5\u4f5c<\/p>\n<p>\u5199\u5b8c Driver \u4e4b\u540e&#xff0c;\u6700\u91cd\u8981\u7684\u4e00\u6b65\u5c31\u662f\u9a8c\u8bc1\u5b83\u771f\u7684\u80fd\u5de5\u4f5c\u3002\u4e0b\u9762\u7ed9\u51fa\u4ece\u914d\u7f6e\u3001\u7f16\u5199\u5e94\u7528\u3001\u5230\u7528\u4e32\u53e3\u5de5\u5177\u89c2\u5bdf\u8f93\u51fa\u7684\u5b8c\u6574\u9a8c\u8bc1\u6d41\u7a0b\u3002<\/p>\n<p>1. \u5728 prj.conf \u4e2d\u542f\u7528 CONFIG_COMPANY_UART&#061;y<\/p>\n<p>Driver \u7684 Kconfig \u5f00\u5173\u662f CONFIG_COMPANY_UART&#xff0c;\u53ea\u6709\u628a\u5b83\u8bbe\u4e3a y&#xff0c;company_uart.c \u624d\u4f1a\u88ab\u7f16\u8bd1\u8fdb\u56fa\u4ef6\u3002\u5728\u5e94\u7528\u7684 prj.conf \u4e2d\u52a0\u4e0a&#xff1a;<\/p>\n<p>CONFIG_COMPANY_UART&#061;y<br \/>\nCONFIG_SERIAL&#061;y<\/p>\n<p>\u5176\u4e2d CONFIG_SERIAL \u662f Zephyr \u4e32\u53e3\u5b50\u7cfb\u7edf\u7684\u57fa\u7840\u5f00\u5173&#xff0c;CONFIG_COMPANY_UART \u5219\u662f\u6211\u4eec\u81ea\u5b9a\u4e49 Driver \u7684\u5f00\u5173\u3002\u4e24\u8005\u90fd\u6253\u5f00\u540e&#xff0c;drivers\/serial\/CMakeLists.txt \u4e2d\u7684 zephyr_library_sources_ifdef(CONFIG_COMPANY_UART company_uart.c) \u624d\u4f1a\u751f\u6548\u3002<\/p>\n<p>2. \u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684 main.c \u8c03\u7528 uart_poll_out() \u53d1\u9001\u5b57\u7b26\u4e32<\/p>\n<p>\u5728\u5e94\u7528\u76ee\u5f55\u4e0b\u521b\u5efa src\/main.c&#xff0c;\u901a\u8fc7 DEVICE_DT_GET(DT_NODELABEL(uart0)) \u62ff\u5230 UART0 \u8bbe\u5907&#xff0c;\u7136\u540e\u5faa\u73af\u8c03\u7528 uart_poll_out() \u53d1\u9001\u5b57\u7b26\u4e32&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/kernel.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/device.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;zephyr\/drivers\/uart.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">MSG<\/span> <span class=\"token string\">&#034;Hello from Company UART!\\\\r\\\\n&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">device<\/span> <span class=\"token operator\">*<\/span>uart <span class=\"token operator\">&#061;<\/span><br \/>\n        <span class=\"token function\">DEVICE_DT_GET<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">DT_NODELABEL<\/span><span class=\"token punctuation\">(<\/span>uart0<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token function\">device_is_ready<\/span><span class=\"token punctuation\">(<\/span>uart<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printk<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;UART0 not ready\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>p <span class=\"token operator\">&#061;<\/span> MSG<span class=\"token punctuation\">;<\/span> <span class=\"token operator\">*<\/span>p<span class=\"token punctuation\">;<\/span> p<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">uart_poll_out<\/span><span class=\"token punctuation\">(<\/span>uart<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span>p<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token function\">k_sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">K_MSEC<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u91cc\u7528 DT_NODELABEL(uart0) \u76f4\u63a5\u5f15\u7528 Devicetree \u4e2d\u7684 uart0 \u8282\u70b9&#xff0c;device_is_ready() \u4f1a\u68c0\u67e5\u8bbe\u5907\u662f\u5426\u6210\u529f\u521d\u59cb\u5316\u3002\u7a0b\u5e8f\u6bcf\u79d2\u901a\u8fc7 uart_poll_out() \u53d1\u9001\u4e00\u6b21 &#034;Hello from Company UART!&#034;\u3002<\/p>\n<p>3. \u4f7f\u7528 minicom \u6216 screen \u8fde\u63a5 UART0 \u89c2\u5bdf\u8f93\u51fa<\/p>\n<p>\u7f16\u8bd1\u70e7\u5f55\u540e&#xff0c;\u628a\u5f00\u53d1\u677f\u7684 UART0 TX\/RX \u5f15\u811a\u901a\u8fc7 USB \u8f6c\u4e32\u53e3\u6a21\u5757\u8fde\u63a5\u5230\u7535\u8111&#xff0c;\u7136\u540e\u67e5\u770b\u8bbe\u5907\u8282\u70b9&#xff1a;<\/p>\n<p><span class=\"token function\">ls<\/span> \/dev\/ttyUSB*<\/p>\n<p>\u5047\u8bbe\u8bc6\u522b\u4e3a \/dev\/ttyUSB0&#xff0c;\u7528 minicom \u8fde\u63a5&#xff08;\u6ce2\u7279\u7387\u4e0e Driver \u914d\u7f6e\u4e00\u81f4&#xff0c;\u8fd9\u91cc\u4ee5 115200 \u4e3a\u4f8b&#xff09;&#xff1a;<\/p>\n<p>minicom <span class=\"token parameter variable\">-D<\/span> \/dev\/ttyUSB0 <span class=\"token parameter variable\">-b<\/span> <span class=\"token number\">115200<\/span><\/p>\n<p>\u6216\u8005\u7528 screen&#xff1a;<\/p>\n<p><span class=\"token function\">screen<\/span> \/dev\/ttyUSB0 <span class=\"token number\">115200<\/span><\/p>\n<p>\u8fde\u63a5\u6210\u529f\u540e&#xff0c;\u590d\u4f4d\u5f00\u53d1\u677f&#xff0c;\u5e94\u8be5\u80fd\u5728\u7ec8\u7aef\u91cc\u5468\u671f\u6027\u770b\u5230&#xff1a;<\/p>\n<p>Hello from Company UART<span class=\"token operator\">!<\/span><br \/>\nHello from Company UART<span class=\"token operator\">!<\/span><br \/>\nHello from Company UART<span class=\"token operator\">!<\/span><\/p>\n<p>\u5982\u679c\u770b\u4e0d\u5230\u8f93\u51fa&#xff0c;\u6309\u4ee5\u4e0b\u987a\u5e8f\u6392\u67e5&#xff1a;<\/p>\n<table>\n<tr>\u73b0\u8c61\u53ef\u80fd\u539f\u56e0\u6392\u67e5\u65b9\u6cd5<\/tr>\n<tbody>\n<tr>\n<td>\u5b8c\u5168\u6ca1\u6709\u8f93\u51fa<\/td>\n<td>CONFIG_COMPANY_UART \u672a\u542f\u7528<\/td>\n<td>\u68c0\u67e5 prj.conf \u662f\u5426\u5305\u542b CONFIG_COMPANY_UART&#061;y<\/td>\n<\/tr>\n<tr>\n<td>\u5b8c\u5168\u6ca1\u6709\u8f93\u51fa<\/td>\n<td>\u6ce2\u7279\u7387\u4e0d\u5339\u914d<\/td>\n<td>\u786e\u8ba4 minicom\/screen \u7684\u6ce2\u7279\u7387\u4e0e Driver \u914d\u7f6e\u4e00\u81f4<\/td>\n<\/tr>\n<tr>\n<td>\u5b8c\u5168\u6ca1\u6709\u8f93\u51fa<\/td>\n<td>TX\/RX \u63a5\u7ebf\u9519\u8bef<\/td>\n<td>\u786e\u8ba4\u5f00\u53d1\u677f TX \u63a5\u6a21\u5757 RX\u3001\u5f00\u53d1\u677f RX \u63a5\u6a21\u5757 TX\u3001\u5171\u5730<\/td>\n<\/tr>\n<tr>\n<td>\u8f93\u51fa\u4e71\u7801<\/td>\n<td>\u6ce2\u7279\u7387\u4e0d\u5339\u914d<\/td>\n<td>\u91cd\u65b0\u8bbe\u7f6e minicom\/screen \u7684\u6ce2\u7279\u7387<\/td>\n<\/tr>\n<tr>\n<td>\u8f93\u51fa\u4e71\u7801<\/td>\n<td>\u65f6\u949f\u914d\u7f6e\u9519\u8bef<\/td>\n<td>\u68c0\u67e5 SoC \u7684 UART \u65f6\u949f\u662f\u5426\u6309 24 MHz \u6b63\u786e\u914d\u7f6e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u9a8c\u8bc1\u901a\u8fc7\u540e&#xff0c;\u5c31\u8bf4\u660e\u4ece compatible &#061; &#034;company,uart&#034; \u5230 uart_poll_out() \u7684\u6574\u6761\u94fe\u8def\u771f\u6b63\u8dd1\u901a\u4e86\u2014\u2014Devicetree \u63cf\u8ff0\u4e86\u786c\u4ef6&#xff0c;Binding \u5b9a\u4e49\u4e86\u5c5e\u6027&#xff0c;Driver \u5b9e\u73b0\u4e86\u64cd\u4f5c&#xff0c;\u5e94\u7528\u901a\u8fc7 Zephyr API \u5b8c\u6210\u4e86\u53d1\u9001\u3002\u8fd9\u4e5f\u662f\u540e\u7eed\u6269\u5c55\u4e3a\u4e2d\u65ad\u9a71\u52a8 UART \u4e4b\u524d&#xff0c;\u6700\u503c\u5f97\u5148\u505a\u7684\u4e00\u6b21\u7aef\u5230\u7aef\u9a8c\u8bc1\u3002<\/p>\n<p>\u8fd9\u5c31\u662f Company SoC BSP \u4ece&#034;\u80fd\u88ab Zephyr \u8bc6\u522b&#034;\u771f\u6b63\u8d70\u5411&#034;\u80fd\u8fd0\u884c\u5916\u8bbe&#034;\u7684\u5173\u952e\u4e00\u6b65\u3002<\/p>\n<p>\u4e8c\u5341\u4e09\u3001\u603b\u7ed3\u4e0e\u4e0b\u7bc7\u9884\u544a<\/p>\n<p>\u5230\u8fd9\u91cc&#xff0c;\u6211\u4eec\u5df2\u7ecf\u5b8c\u6574\u8d70\u901a\u4e86\u4ece Devicetree \u7684 compatible &#061; &#034;company,uart&#034; \u5230\u5e94\u7528\u7a0b\u5e8f\u771f\u6b63\u8c03\u7528 uart_poll_out() \u7684\u6574\u6761\u94fe\u8def\u3002\u56de\u987e\u4e00\u4e0b\u8fd9\u4e2a\u95ed\u73af\u7684\u5173\u952e\u8282\u70b9&#xff1a;<\/p>\n<p>compatible <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;company,uart&#034;<\/span><br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nBinding&#xff08;\u5b9a\u4e49\u5c5e\u6027&#xff09;<br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nDevicetree node&#xff08;\u63cf\u8ff0\u786c\u4ef6\u8d44\u6e90&#xff09;<br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nDT_INST_REG_ADDR<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>&#xff08;\u83b7\u53d6 base address&#xff09;<br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\ncompany_uart_config&#xff08;\u7f16\u8bd1\u65f6\u9759\u6001\u4fe1\u606f&#xff09;<br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nstruct device&#xff08;\u8fde\u63a5 config \/ data \/ api&#xff09;<br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nuart_driver_api&#xff08;\u6ce8\u518c poll_out \/ poll_in&#xff09;<br \/>\n        \u2502<br \/>\n        \u25bc<br \/>\nuart_poll_out<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>&#xff08;\u5e94\u7528\u7a0b\u5e8f\u8c03\u7528&#xff09;<\/p>\n<p>\u672c\u6587\u8981\u70b9\u56de\u987e&#xff1a;<\/p>\n<li>Devicetree \u63cf\u8ff0&#034;\u786c\u4ef6\u5728\u54ea\u91cc&#034;&#xff1a;compatible\u3001reg\u3001interrupts\u3001status \u5171\u540c\u5b9a\u4e49\u4e86 UART0 \u7684\u8d44\u6e90\u4e0e\u72b6\u6001\u3002<\/li>\n<li>Binding \u5b9a\u4e49&#034;\u5c5e\u6027\u600e\u4e48\u89e3\u6790&#034;&#xff1a;\u8ba9 DT_INST_REG_ADDR() \u7b49\u5b8f\u80fd\u591f\u4ece Devicetree \u8282\u70b9\u4e2d\u63d0\u53d6\u51fa base address\u3002<\/li>\n<li>Driver \u63cf\u8ff0&#034;\u5982\u4f55\u64cd\u4f5c\u786c\u4ef6&#034;&#xff1a;company_uart_poll_out() \u901a\u8fc7 sys_read32() \/ sys_write32() \u8bbf\u95ee\u5bc4\u5b58\u5668&#xff0c;\u5b9e\u73b0\u771f\u6b63\u7684\u6570\u636e\u6536\u53d1\u3002<\/li>\n<li>struct device \u662f\u8fde\u63a5\u67a2\u7ebd&#xff1a;\u5b83\u628a config&#xff08;\u9759\u6001\u4fe1\u606f&#xff09;\u3001data&#xff08;\u8fd0\u884c\u65f6\u72b6\u6001&#xff09;\u548c api&#xff08;\u51fd\u6570\u6307\u9488\u8868&#xff09;\u4e09\u8005\u7ed1\u5b9a\u5728\u4e00\u8d77\u3002<\/li>\n<li>Zephyr API \u5c4f\u853d\u786c\u4ef6\u5dee\u5f02&#xff1a;\u5e94\u7528\u7a0b\u5e8f\u53ea\u9700\u8981 DEVICE_DT_GET(DT_NODELABEL(uart0)) \u62ff\u5230\u8bbe\u5907&#xff0c;\u518d\u8c03\u7528 uart_poll_out() \u5373\u53ef&#xff0c;\u5b8c\u5168\u4e0d\u9700\u8981\u5173\u5fc3 Company UART \u7684\u5bc4\u5b58\u5668\u7ec6\u8282\u3002<\/li>\n<p>\u4e3a\u4ec0\u4e48\u5148\u5b9e\u73b0 Polling \u6a21\u5f0f&#xff1f;<\/p>\n<p>\u56e0\u4e3a Polling \u6a21\u5f0f\u8db3\u591f\u7b80\u5355&#xff0c;\u80fd\u8ba9\u6211\u4eec\u628a\u6ce8\u610f\u529b\u96c6\u4e2d\u5728 Zephyr Driver Model \u7684\u6838\u5fc3\u95ed\u73af \u4e0a\u3002\u5b83\u7528 CPU \u65f6\u95f4\u6362\u4ee3\u7801\u7b80\u5355&#xff0c;\u9002\u5408\u8c03\u8bd5\u548c\u4f4e\u901f\u7387\u573a\u666f&#xff1b;\u4f46\u4ee3\u4ef7\u662f CPU \u5fc5\u987b\u6301\u7eed\u8f6e\u8be2 STATUS \u5bc4\u5b58\u5668&#xff0c;\u65e0\u6cd5\u5904\u7406\u9ad8\u901f\u7387\u901a\u4fe1\u6216\u4f4e\u529f\u8017\u9700\u6c42\u3002<\/p>\n<p>\u4e0b\u7bc7\u9884\u544a&#xff1a;\u6269\u5c55\u4e3a\u4e2d\u65ad\u9a71\u52a8 UART<\/p>\n<p>\u4e0b\u4e00\u7bc7\u5c06\u57fa\u4e8e\u5f53\u524d\u7684\u6700\u5c0f\u9aa8\u67b6&#xff0c;\u628a\u5b83\u6269\u5c55\u4e3a\u5b8c\u6574\u7684\u4e2d\u65ad\u9a71\u52a8 UART&#xff0c;\u5177\u4f53\u5185\u5bb9\u5305\u62ec&#xff1a;<\/p>\n<li>\u5728 config \u4e2d\u589e\u52a0 irq \u5b57\u6bb5&#xff1a;\u901a\u8fc7 DT_INST_IRQN(inst) \u628a Devicetree \u4e2d&#034;\u95f2\u7f6e&#034;\u7684 interrupts &#061; &lt;5&gt; \u771f\u6b63\u7528\u8d77\u6765\u3002<\/li>\n<li>\u5728 init() \u4e2d\u6ce8\u518c ISR&#xff1a;\u4f7f\u7528 IRQ_CONNECT() \u7ed1\u5b9a\u4e2d\u65ad\u670d\u52a1\u51fd\u6570&#xff0c;\u518d\u901a\u8fc7 irq_enable() \u4f7f\u80fd\u4e2d\u65ad\u3002<\/li>\n<li>\u5b9e\u73b0 company_uart_isr()&#xff1a;\u8bfb\u53d6 STATUS\u3001\u5224\u65ad RX_READY\u3001\u8bfb\u53d6 DATA&#xff0c;\u5e76\u5199\u5165\u73af\u5f62\u7f13\u51b2\u533a\u3002<\/li>\n<li>\u5f15\u5165\u73af\u5f62\u7f13\u51b2\u533a&#xff1a;\u5728 data \u4e2d\u589e\u52a0 struct ring_buf&#xff0c;\u8ba9 ISR \u4e0e\u5e94\u7528\u4e4b\u95f4\u901a\u8fc7\u7f13\u51b2\u533a\u89e3\u8026&#xff0c;\u65e2\u4e0d\u4e22\u6570\u636e\u4e5f\u4e0d\u963b\u585e\u4e2d\u65ad\u5904\u7406\u3002<\/li>\n<li>\u8865\u5145\u4e2d\u65ad\u76f8\u5173 API&#xff1a;\u5728 uart_driver_api \u4e2d\u589e\u52a0 irq_callback_set\u3001irq_update\u3001irq_is_pending\u3001irq_enable\u3001irq_disable \u7b49\u56de\u8c03\u3002<\/li>\n<p>\u5230\u90a3\u65f6&#xff0c;Polling \u4e0e Interrupt \u4e24\u79cd\u6a21\u5f0f\u4f1a\u5171\u5b58\u4e8e\u540c\u4e00\u4e2a Driver \u4e2d&#xff1a;poll_out() \/ poll_in() \u4fdd\u7559\u7528\u4e8e\u8c03\u8bd5\u548c\u7b80\u5355\u573a\u666f&#xff0c;\u4e2d\u65ad\u8def\u5f84\u5219\u8d1f\u8d23\u4ea7\u54c1\u7ea7\u7684\u9ad8\u901f\u6536\u53d1\u3002\u8fd9\u4e5f\u6b63\u662f Zephyr \u4e2d\u8bb8\u591a\u771f\u5b9e UART Driver \u7684\u6700\u7ec8\u5f62\u6001\u3002<\/p>\n<p>\u4ece compatible \u5230 uart_poll_out()&#xff0c;\u6211\u4eec\u5df2\u7ecf\u8fc8\u51fa\u4e86 Company SoC BSP \u4ece&#034;\u80fd\u88ab Zephyr \u8bc6\u522b&#034;\u5230&#034;\u80fd\u8fd0\u884c\u5916\u8bbe&#034;\u7684\u5173\u952e\u4e00\u6b65&#xff1b;\u800c\u4e2d\u65ad\u9a71\u52a8&#xff0c;\u5219\u662f\u8ba9\u8fd9\u4e2a Driver \u771f\u6b63\u8d70\u5411\u4ea7\u54c1\u7ea7\u7684\u4e0b\u4e00\u4e2a\u91cc\u7a0b\u7891\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6458\u8981&#xff1a;\u672c\u6587\u5b8c\u6574\u8d70\u901a Zephyr \u4ece Devicetree \u7684 compatible  \\&#8221;company,uart\\&#8221; \u5230\u771f\u6b63\u53ef\u8fd0\u884c\u7684 UART Driver \u5168\u94fe\u8def\u3002\u6587\u7ae0\u4ece\u6574\u4f53\u67b6\u6784\u51fa\u53d1&#xff0c;\u4f9d\u6b21\u5b9a\u4e49\u5bc4\u5b58\u5668\u3001Config\u3001Data&#xff0c;\u5b9e\u73b0 poll_out() \u4e0e poll_in()&#xff0c;\u6ce8\u518c uart_driver_api&#xff0c;\u5e76\u901a\u8fc7 DT_INST_REG_ADDR() \u4ece Devicetree \u81ea\u52a8\u83b7\u53d6 base a<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[887,58,217,269,220],"topic":[],"class_list":["post-107999","post","type-post","status-publish","format-standard","hentry","category-server","tag-iot","tag-linux","tag-stm32","tag-269","tag-220"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u8f7b\u677e\u5b66\u4e60Zephyr BSP: 28-Company UART \u9a71\u52a8 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/107999.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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