{"id":82342,"date":"2026-07-25T08:02:37","date_gmt":"2026-07-25T00:02:37","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/82342.html"},"modified":"2026-07-25T08:02:37","modified_gmt":"2026-07-25T00:02:37","slug":"arm-imx6ull%e7%9a%84%e4%b8%b2%e5%8f%a3uart%e4%bb%8b%e7%bb%8d%ef%bc%9a%e7%9b%b8%e5%85%b3%e5%af%84%e5%ad%98%e5%99%a8%e8%af%b4%e6%98%8e%e3%80%81%e6%b3%a2%e7%89%b9%e7%8e%87%e7%9a%84%e8%ae%a1%e7%ae%97","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/82342.html","title":{"rendered":"ARM---IMX6ULL\u7684\u4e32\u53e3UART\u4ecb\u7ecd\uff1a\u76f8\u5173\u5bc4\u5b58\u5668\u8bf4\u660e\u3001\u6ce2\u7279\u7387\u7684\u8ba1\u7b97\u3001\u521d\u59cb\u5316\u65b9\u6cd5\u4e0e\u793a\u4f8b\u4ee3\u7801\u7b49"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

\n

\u4e00. \u4e32\u53e3\u76f8\u5173\u77e5\u8bc6\u56de\u987e<\/p>\n

1.1 \u901a\u4fe1\u65b9\u5f0f<\/p>\n

1.2 \u6570\u636e\u4f20\u8f93\u65b9\u5f0f<\/p>\n

1.3 \u4e32\u53e3\u4f20\u8f93\u987a\u5e8f<\/p>\n

1.4 \u4e32\u53e3\u901a\u4fe1\u65f6\u5e8f<\/p>\n

1.5 \u4e32\u53e3\u6ce2\u7279\u7387<\/p>\n

1.6 \u4e32\u53e3\u901a\u4fe1\u53c2\u6570<\/p>\n

1.7 \u5e38\u89c1\u4e32\u53e3\u7535\u5e73\u79cd\u7c7b<\/p>\n

\u4e8c. IMX6ULL \u4e32\u53e3\u7b80\u4ecb<\/p>\n

2.1 IMX6ULL \u4e32\u53e3\u7279\u6027<\/p>\n

2.2 \u4e32\u53e3\u65f6\u949f\u6e90\u7684\u9009\u62e9<\/p>\n

2.3\u00a0\u5bc4\u5b58\u5668<\/p>\n

2.3.1\u00a0UARTx_ UCR1 \u4e32\u53e3\u63a7\u5236\u5bc4\u5b58\u56681<\/p>\n

2.3.2\u00a0UARTx_UCR2 \u4e32\u53e3\u63a7\u5236\u5bc4\u5b58\u56682<\/p>\n

2.3.3\u00a0UARTx_UCR3 \u4e32\u53e3\u63a7\u5236\u5bc4\u5b58\u56683<\/p>\n

2.3.4\u00a0UARTx_USR2 \u4e32\u53e3\u72b6\u6001\u5bc4\u5b58\u56682<\/p>\n

2.3.5\u00a0UARTx_UFCR \u5bc4\u5b58\u5668<\/p>\n

2.3.6\u00a0UARTx_UBIR \u548c UARTx_UBMR\u5bc4\u5b58\u5668<\/p>\n

1\u3001\u4e32\u53e3\u6ce2\u7279\u7387\u7684\u8ba1\u7b97<\/p>\n

\u4e09. IMX6ULL \u4e32\u53e3\u793a\u4f8b\u4ee3\u7801<\/p>\n

3.1 \u4e32\u53e3\u521d\u59cb\u5316\u6d41\u7a0b\u4e0e\u4ee3\u7801<\/p>\n

3.2 \u4e32\u53e3\u53d1\u9001\u793a\u4f8b\u4ee3\u7801<\/p>\n

3.3 \u4e32\u53e3\u63a5\u6536\u793a\u4f8b\u4ee3\u7801<\/p>\n

\n

\u4e00. \u4e32\u53e3\u76f8\u5173\u77e5\u8bc6\u56de\u987e<\/h2>\n

1.1 \u901a\u4fe1\u65b9\u5f0f<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5355\u5de5\u00a0 \u00a0 \u00a0 \u00a0 \u534a\u53cc\u5de5\u00a0 \u00a0 \u00a0 \u00a0 \u5168\u53cc\u5de5<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u4e32\u53e3\u662f\u5168\u53cc\u5de5<\/p>\n

1.2 \u6570\u636e\u4f20\u8f93\u65b9\u5f0f<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u4e32\u884c\u00a0 \u00a0 \u00a0 \u00a0 \u5e76\u884c<\/p>\n

1.3 \u4e32\u53e3\u4f20\u8f93\u987a\u5e8f<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 LSB：\u4f4e\u4f4d\u5148\u884c\u539f\u5219，\u4e32\u53e3\u662fLSB\u539f\u5219<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 MSB：\u9ad8\u4f4d\u5148\u884c\u539f\u5219<\/p>\n

1.4 \u4e32\u53e3\u901a\u4fe1\u65f6\u5e8f<\/h3>\n

\"\"<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5728\u7a7a\u95f2\u65f6，TXD\u6570\u636e\u7ebf\u662f\u9ad8\u7535\u5e73，\u5f53\u53d1\u9001\u65b9\u53d1\u9001\u6570\u636e\u65f6\u5148\u53d1\u9001\u4e00\u4e2a\u4f4e\u7535\u5e73\u4f5c\u4e3a\u8d77\u59cb\u4f4d，\u7136\u540e\u6309\u7167\u4f4e\u4f4d\u5148\u884c\u539f\u5219\u53d1\u90018\u4f4d\u6570\u636e，\u4e4b\u540e\u53ef\u4ee5\u9009\u62e9\u6027\u7684\u53d1\u9001\u4e00\u4f4d\u6821\u9a8c\u4f4d，\u53ef\u4ee5\u662f\u5947\u6821\u9a8c，\u5076\u6821\u9a8c，\u4e5f\u53ef\u4ee5\u65e0\u6821\u9a8c，\u6700\u540e\u53d1\u9001\u4e00\u4e2a\u505c\u6b62\u4f4d，\u505c\u6b62\u4f4d\u662f\u9ad8\u7535\u5e73，\u7528\u4e8e\u8868\u793a\u6570\u636e\u4f20\u8f93\u7684\u95f4\u9694，\u505c\u6b62\u4f4d\u53ef\u4ee5\u662f1\u4f4d\u30011.5\u4f4d\u30012\u4f4d<\/p>\n

1.5 \u4e32\u53e3\u6ce2\u7279\u7387<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6ce2\u7279\u7387：\u6bcf\u79d2\u4f20\u8f93\u7684bit\u6570<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5e38\u89c1\u6ce2\u7279\u7387：2400，4800，9600，115200<\/p>\n

1.6 \u4e32\u53e3\u901a\u4fe1\u53c2\u6570<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 9600 8 N 1<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u89e3\u91ca：\u6ce2\u7279\u7387+\u6570\u636e\u4f4d+\u6821\u9a8c\u4f4d+\u505c\u6b62\u4f4d<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u53e6：O(odd)\u8868\u793a\u5947\u6821\u9a8c，E(even)\u8868\u793a\u5076\u6821\u9a8c<\/p>\n

1.7 \u5e38\u89c1\u4e32\u53e3\u7535\u5e73\u79cd\u7c7b<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 TTL：\u9ad8\u7535\u5e731：1.8v，3.3v，5v\u00a0 \u00a0 \u00a0 \u4f4e\u7535\u5e730：0v\u00a0 \u00a0 \u82af\u7247CH340\u8fdb\u884cUSB\u4e0eTTL\u7535\u5e73\u7684\u8f6c\u6362<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 TTL\u901a\u4fe1\u8ddd\u79bb\u901a\u5e38\u88ab\u9650\u5236\u572810~20\u7c73\u4e4b\u95f4<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 RS232(\u8d1f\u903b\u8f91)：\u9ad8\u7535\u5e731：-3 ~ -15V\u4e4b\u95f4\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f4e\u7535\u5e730：3 ~ 15V\u4e4b\u95f4<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u6536\u53d1\u4e3b\u673a\u95f4\u6709\u4e09\u6839\u7ebf，\u5206\u522b\u662f\u6536\u3001\u53d1\u548c\u5730，\u56e0\u6b64RS232\u662f\u5168\u53cc\u5de5\u7684<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u7406\u8bba\u4e0aRS232\u80fd\u591f\u4f20\u8f9320~30\u7c73<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 RS485(\u5dee\u5206\u4fe1\u53f7)：\u9ad8\u7535\u5e731：2 ~ 6V\u4e4b\u95f4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u4f4e\u7535\u5e730：-2\u00a0~ -6V\u4e4b\u95f4<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u662f\u534a\u53cc\u5de5\u4f20\u8f93<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0RS485\u7684\u4f20\u8f93\u8ddd\u79bb\u53ef\u8fbe1200\u7c73，\u9002\u7528\u4e8e\u5927\u8303\u56f4\u7684\u6570\u636e\u4f20\u8f93\u9700\u6c42<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5dee\u5206\u4fe1\u53f7\u63d0\u9ad8\u4e86\u6297\u5e72\u6270\u80fd\u529b<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/p>\n

\u4e8c. IMX6ULL \u4e32\u53e3\u7b80\u4ecb<\/h2>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0UART \u5168\u79f0\u662f Universal Asynchronous Receiver\/Trasmitter—\u5f02\u6b65\u4e32\u884c\u6536\u53d1\u5668<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e32\u53e3\u5168\u79f0\u53eb\u505a\u4e32\u884c\u63a5\u53e3，\u901a\u5e38\u4e5f\u53eb\u505a COM \u63a5\u53e3，\u4e32\u884c\u63a5\u53e3\u6307\u7684\u662f\u6570\u636e\u4e00\u4e2a\u4e00\u4e2a\u7684\u987a\u5e8f\u4f20 \u8f93，\u901a\u4fe1\u7ebf\u8def\u7b80\u5355\u3002\u4f7f\u7528\u4e24\u6761\u7ebf\u5373\u53ef\u5b9e\u73b0\u53cc\u5411\u901a\u4fe1，\u4e00\u6761\u7528\u4e8e\u53d1\u9001，\u4e00\u6761\u7528\u4e8e\u63a5\u6536\u3002\u4e32\u53e3\u901a\u4fe1\u8ddd\u79bb\u8fdc，\u4f46\u662f\u901f\u5ea6\u76f8\u5bf9\u4f1a\u4f4e，\u4e32\u53e3\u662f\u4e00\u79cd\u5f88\u5e38\u7528\u7684\u5de5\u4e1a\u63a5\u53e3\u3002I.MX6ULL \u81ea\u5e26\u7684 UART \u5916\u8bbe\u5c31\u662f\u4e32\u53e3\u7684\u4e00\u79cd，UART \u5168\u79f0\u662f Universal Asynchronous Receiver\/Trasmitter，\u4e5f\u5c31\u662f\u5f02\u6b65\u4e32\u884c\u6536\u53d1\u5668\u3002\u65e2\u7136\u6709\u5f02\u6b65\u4e32\u884c\u6536\u53d1\u5668，\u90a3\u80af\u5b9a\u4e5f\u6709\u540c\u6b65\u4e32\u884c\u6536\u53d1\u5668，\u5c31\u662fUSART，USART \u7684\u5168\u79f0\u662f Universal Synchron ous\/Asynchronous Receiver\/Transmitter，\u4e5f\u5c31\u662f\u540c\u6b65\/\u5f02\u6b65\u4e32\u884c\u6536\u53d1\u5668\u3002\u76f8\u6bd4 UART \u591a\u4e86\u4e00\u4e2a\u540c\u6b65\u7684\u529f\u80fd，\u5728\u786c\u4ef6\u4e0a\u4f53\u73b0\u51fa\u6765\u7684\u5c31\u662f\u591a\u4e86\u4e00\u6761\u65f6\u949f\u7ebf\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 IMX6ULL \u7684\u4e32\u53e3\u539f\u7406\u56fe\u5982\u4e0b：<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0UART1_RXD \u8fde\u63a5\u5230\u4e86soc\u7684\u00a0UART1_RX \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0UART1_TXD\u00a0\u8fde\u63a5\u5230\u4e86soc\u7684\u00a0UART1_TX<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n<\/p>\n

2.1 IMX6ULL \u4e32\u53e3\u7279\u6027<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1\u3001\u652f\u6301\u9ad8\u901fRS232，\u6700\u9ad85Mbit\/s \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 2\u3001\u652f\u6301\u7ea2\u5916\u7ebf\u63a5\u53e3(IrDA)，\u53ef\u8fbe115.2Kbit\/s \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 3\u3001\u652f\u6301 9 \u4f4d\u6216\u8005\u591a\u8282\u70b9\u6a21\u5f0f(RS-485)，\u5355\u4e3b\u591a\u4ece\u7684\u901a\u4fe1RS485 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Master \u00a0 \u00a0 Slaver \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Modbus\u5e94\u7528\u5c42\u534f\u8bae，\u6709\u4e00\u4e2a\u5730\u5740\u7801，\u53ef\u4ee5\u533a\u5206\u4ece\u673a， \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0RS485\u7269\u7406\u5c42\u534f\u8bae \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u81ea\u52a8\u68c0\u6d4b\u4ece\u673a\u5730\u5740—\u901a\u8fc7\u5bc4\u5b58\u5668\u914d\u7f6e\u5730\u5740 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 4\u30017\/8\u4f4d\u7684\u6570\u636eRS232， 9\u4f4d\u6570\u636eRS485—-\u6709\u6821\u9a8c\u4f4d \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 5\u30011\/2\u4f4d\u7684\u505c\u6b62\u4f4d \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 6\u3001\u53ef\u7f16\u7a0b\u6821\u9a8c\u4f4d：\u5076，\u5947，\u65e0\u6821\u9a8cparity \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 7\u3001\u652f\u6301\u786c\u4ef6\u6d41\u63a7\u00a0\u00a0 \u00a0，\u9664\u4e86TXD,RXD\u5f15\u811a，\u8fd8\u6709RTS_B\u4e0eCTS_B\u4e24\u4e2a\u63a7\u5236\u5f15\u811a \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0RTS_B：request to send_B(\u4f4e\u7535\u5e73\u6709\u6548)：\u8bf7\u6c42\u53d1\u9001\u63a7\u5236\u5f15\u811a \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0CTS_B：clear to send：\u6e05\u9664\u53d1\u9001\u63a7\u5236\u5f15\u811a \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a08\u3001RS485\u53ef\u4ee5\u901a\u8fc7CTS_B\u5f15\u811a\u63a7\u5236—\u534a\u53cc\u5de5 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u4f4e：\u63a5\u6536 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u9ad8：\u53d1\u9001 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 9\u3001FIFO：\u652f\u6301\u7f13\u51b2\u533a \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0TX_FIFO：\u5927\u5c0f\u53ef\u4ee5\u8bbe\u7f6e \u00a032\u5b57\u8282 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0RX_FIFO：<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a010\u3001IMX6ULL\u6709\u4e03\u4e2a\u4e32\u53e3 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 UART1 – UART7<\/p>\n<\/p>\n

2.2 \u4e32\u53e3\u65f6\u949f\u6e90\u7684\u9009\u62e9<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0UART \u7684\u65f6\u949f\u6e90\u662f\u7531\u5bc4\u5b58\u5668 CCM_CSCDR1 \u7684 UART_CLK_SEL(bit6)\u4f4d\u6765\u9009\u62e9\u7684，\u5f53\u4e3a 0 \u7684\u65f6\u5019 UART \u7684\u65f6\u949f\u6e90\u4e3a pll3_80m(80MHz)，\u5982\u679c\u4e3a 1 \u7684\u65f6\u5019 UART \u7684\u65f6\u949f\u6e90\u4e3a osc_clk(24M)， \u4e00\u822c\u9009\u62e9 pll3_80m \u4f5c\u4e3a UART \u7684\u65f6\u949f\u6e90\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5bc4\u5b58\u5668 CCM_CSCDR1 \u7684 UART_CLK_PODF(bit5:0) \u4f4d\u662f UART \u7684\u65f6\u949f\u5206\u9891\u503c，\u53ef\u8bbe\u7f6e 0~63，\u5206\u522b\u5bf9\u5e94 1~64 \u5206\u9891，\u4e00\u822c\u8bbe\u7f6e\u4e3a 1 \u5206\u9891，\u56e0\u6b64\u6700\u7ec8 \u8fdb\u5165 UART \u7684\u65f6\u949f\u4e3a 80MHz<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5bc4\u5b58\u5668CCM_CSCDR1\u5982\u56fe\u6240\u793a<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u53ef\u4ee5\u770b\u5230\u8fd9\u4e2a\u5bc4\u5b58\u5668\u9ed8\u8ba4\u5c31\u662f\u9009\u62e9pll3_80m，\u5e76\u4e14\u662f\u4e00\u5206\u9891，\u6545\u65e0\u9700\u914d\u7f6e<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n\n\n\n\n
UART_CLK_SEL(bit6)<\/td>\n\n

UART \u65f6\u949f\u590d\u7528\u5668\u9009\u62e9\u5668<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00：\u9009\u62e9pll3_80m<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01：\u9009\u62e9osc_clk<\/p>\n<\/td>\n<\/tr>\n

UART_CLK_PODF(bit5:0)<\/td>\n\n

UART\u65f6\u949f\u5206\u9891\u9009\u62e9<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0000000：1\u5206\u9891 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0111111：2^6 + 1 = 65\u5206\u9891<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"\"<\/p>\n<\/p>\n

2.3\u00a0\u5bc4\u5b58\u5668<\/h3>\n

2.3.1\u00a0UARTx_ UCR1 \u4e32\u53e3\u63a7\u5236\u5bc4\u5b58\u56681<\/h4>\n\n\n\n\n
ADBR(bit14)<\/td>\n\n

\u81ea\u52a8\u6ce2\u7279\u7387\u68c0\u6d4b\u4f7f\u80fd\u4f4d<\/p>\n

\u4e3a 0 \u7684\u65f6\u5019\u5173\u95ed\u81ea\u52a8\u6ce2\u7279\u7387\u68c0\u6d4b<\/p>\n

\u4e3a 1 \u7684\u65f6\u5019\u4f7f \u80fd\u81ea\u52a8\u6ce2\u7279\u7387\u68c0\u6d4b<\/p>\n<\/td>\n<\/tr>\n

UARTEN(bit0)<\/td>\n\n

UART \u4f7f\u80fd\u4f4d<\/p>\n

\u4e3a 0 \u7684\u65f6\u5019\u5173\u95ed UART<\/p>\n

\u4e3a 1 \u7684\u65f6\u5019\u4f7f\u80fd UART<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"\"<\/p>\n<\/p>\n

2.3.2\u00a0UARTx_UCR2 \u4e32\u53e3\u63a7\u5236\u5bc4\u5b58\u56682<\/h4>\n\n\n\n\n\n\n\n\n\n\n
IRTS(bit14)<\/td>\n\n

Ignore RTS Pin<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00 ：\u4f7f\u7528 RTS \u5f15\u811a\u529f\u80fd<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01 ：\u5ffd\u7565 RTS \u5f15\u811a<\/p>\n<\/td>\n<\/tr>\n

PREN(bit8)<\/td>\n\n

Parity Enable<\/p>\n

\u5947\u5076\u6821\u9a8c\u4f7f\u80fd\u4f4d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00：\u5173\u95ed\u5947\u5076\u6821\u9a8c<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01：\u4f7f\u80fd\u5947\u5076\u6821\u9a8c<\/p>\n<\/td>\n<\/tr>\n

PROE(bit7)<\/td>\n\n

\u5947\u5076\u6821\u9a8c\u6a21\u5f0f\u9009\u62e9\u4f4d，\u5f00\u542f\u5947\u5076\u6821\u9a8c\u4ee5\u540e\u6b64\u4f4d：<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00： \u4f7f\u7528\u5076\u6821\u9a8c<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01 ：\u4f7f\u7528\u5947\u6821\u9a8c<\/p>\n<\/td>\n<\/tr>\n

STPB(bit6)<\/td>\n\n

\u505c\u6b62\u4f4d\u6570\u91cf<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00 ：1 \u4f4d\u505c\u6b62\u4f4d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01 ：2 \u4f4d\u505c\u6b62\u4f4d<\/p>\n<\/td>\n<\/tr>\n

WS(bit5)<\/td>\n\n

\u6570\u636e\u4f4d\u957f\u5ea6<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00 ：\u9009\u62e9 7 \u4f4d\u6570\u636e\u4f4d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01 ：\u9009\u62e9 8 \u4f4d\u6570\u636e\u4f4d<\/p>\n<\/td>\n<\/tr>\n

TXEN(bit2)<\/td>\n\n

\u53d1\u9001\u4f7f\u80fd\u4f4d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00：\u5173\u95edUART\u7684\u53d1\u9001\u529f\u80fd<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01：\u6253\u5f00UART\u7684\u53d1\u9001\u529f\u80fd<\/p>\n<\/td>\n<\/tr>\n

RXEN(bit1)<\/td>\n\n

\u63a5\u6536\u4f7f\u80fd\u4f4d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00：\u5173\u95edUART\u7684\u63a5\u6536\u529f\u80fd<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01：\u6253\u5f00UART\u7684\u63a5\u6536\u529f\u80fd<\/p>\n<\/td>\n<\/tr>\n

SRST(bit0)<\/td>\n\n

\u8f6f\u4ef6\u590d\u4f4d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00：\u8f6f\u4ef6\u590d\u4f4dUART，\u8f6f\u4ef6\u590d\u4f4d\u72b6\u6001\u5c06\u5728 4 \u4e2a\u6a21\u5757\u65f6\u949f\u5468\u671f\u540e\u4fdd\u6301\u6fc0\u6d3b\u72b6\u6001<\/span>，\u6545\u521d\u59cb\u5316\u4e32\u53e3\u65f6，\u6700\u597d\u5148\u590d\u4f4d\u4e32\u53e3：UART1->UCR2 &= ~(1 << 0);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01：\u8868\u793a\u590d\u4f4d\u5b8c\u6210\u3002\u590d\u4f4d\u5b8c\u6210\u4ee5\u540e\u6b64\u4f4d\u4f1a\u81ea\u52a8\u7f6e1，\u8868\u793a\u590d\u4f4d\u5b8c\u6210\u3002<\/p>\n

\u6b64\u4f4d\u53ea\u80fd\u51990，\u51991\u4f1a\u88ab\u5ffd\u7565\u6389<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"\"<\/p>\n<\/p>\n

2.3.3\u00a0UARTx_UCR3 \u4e32\u53e3\u63a7\u5236\u5bc4\u5b58\u56683<\/h4>\n\n\n\n
RXDMUXSEL(bit2)<\/td>\nRXD \u591a\u8def\u590d\u7528\u8f93\u5165\u5df2\u9009\u4e2d\u3002\u4e3a\u4e32\u884c\u548c\u7ea2\u5916\u8f93\u5165\u4fe1\u53f7\u9009\u62e9\u6b63\u786e\u7684\u8f93\u5165\u5f15\u811a\u3002 \u6ce8\u610f：\u5728\u8be5\u82af\u7247\u4e2d，UART \u91c7\u7528\u591a\u8def\u590d\u7528\u6a21\u5f0f，\u56e0\u6b64\u6b64\u4f4d\u5e94\u59cb\u7ec8\u8bbe\u7f6e\u4e3a\u201c1\u201d<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"\"<\/p>\n<\/p>\n

2.3.4\u00a0UARTx_USR2 \u4e32\u53e3\u72b6\u6001\u5bc4\u5b58\u56682<\/h4>\n\n\n\n\n
TXDC(bit3)<\/td>\n\n

\u53d1\u9001\u5b8c\u6210\u6807\u5fd7\u4f4d<\/p>\n

\u4e3a 1 \u7684\u65f6\u5019\u8868\u660e\u53d1\u9001\u7f13\u51b2(TxFIFO)\u548c\u79fb\u4f4d\u5bc4\u5b58\u5668\u4e3a\u7a7a，\u4e5f\u5c31\u662f\u53d1\u9001\u5b8c\u6210，<\/p>\n

\u5411 TxFIFO \u5199\u5165\u6570\u636e\u6b64\u4f4d\u5c31\u4f1a\u81ea\u52a8\u6e05\u96f6<\/p>\n

\u4e3a 0 \u8868\u793a\u53d1\u9001\u672a\u5b8c\u6210<\/p>\n

\u5728\u4f7f\u7528\u4e32\u53e3\u8fdb\u884c\u53d1\u9001\u6570\u636e\u65f6，\u53ef\u4ee5\u8fdb\u884c\u5224\u65ad\u00a0:while( (UART1->USR2 & (1 << 3)) == 0 );<\/span><\/p>\n<\/td>\n<\/tr>\n

RDR(bit0)<\/td>\n\n

\u6570\u636e\u63a5\u6536\u6807\u5fd7\u4f4d<\/p>\n

\u4e3a 1 \u7684\u65f6\u5019\u8868\u660e\u81f3\u5c11\u63a5\u6536\u5230\u4e00\u4e2a\u6570\u636e<\/p>\n

\u4ece\u5bc4\u5b58\u5668 UARTx_U RXD \u8bfb\u53d6\u6570\u636e\u63a5\u6536\u5230\u7684\u6570\u636e\u4ee5\u540e\u6b64\u4f4d\u4f1a\u81ea\u52a8\u6e05\u96f6<\/p>\n

\u5728\u4f7f\u7528\u4e32\u53e3\u63a5\u6536\u6570\u636e\u65f6，\u53ef\u4ee5\u8fdb\u884c\u5224\u65ad：\u00a0 \u00a0 while( (UART1->USR2 & (1 << 0)) == 0 );<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"\"<\/p>\n<\/p>\n

2.3.5\u00a0UARTx_UFCR \u5bc4\u5b58\u5668<\/h4>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0UART FIFO Control Register<\/p>\n\n\n\n
RFDIV(9:7)<\/td>\n\n

\u7528\u6765\u8bbe\u7f6e\u53c2\u8003\u65f6\u949f\u5206\u9891<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8bbe\u7f6e\u5982\u4e0b\u8868：<\/p>\n

\"\"<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"\"<\/p>\n<\/p>\n

2.3.6\u00a0UARTx_UBIR \u548c UARTx_UBMR\u5bc4\u5b58\u5668<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u793a\u4f8b\u914d\u7f6e\u4ee3\u7801：<\/p>\n

\/\u8bbe\u7f6e\u4e00\u5206\u9891，\u4e32\u53e3\u65f6\u949f\u4e3a80MHz
\n\/\/UART1->UFCR |= (5 << 7);
\nUART1->UFCR = (5 << 7);
\n\/\u8bbe\u7f6e\u6ce2\u7279\u7387
\nUART1->UBIR = 999;
\nUART1->UBMR = 43402; <\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6ce8\u610f：UFCR \u5176\u4ed6\u4f4d\u6709 FIFO \u914d\u7f6e，\u4f7f\u7528\u00a0\u00a0|=\u00a0\u4f1a\u4fdd\u7559\u539f\u6709\u4e0d\u786e\u5b9a\u503c，\u88f8\u673a\u4e0a\u7535\u5bc4\u5b58\u5668\u662f\u968f\u673a\u503c，\u6700\u597d\u4f7f\u7528 = \u76f4\u63a5\u8d4b\u503c<\/p>\n<\/p>\n

UBIR:<\/p>\n

\"\"<\/p>\n

UBMR:<\/p>\n

\"\"<\/p>\n<\/p>\n

1\u3001\u4e32\u53e3\u6ce2\u7279\u7387\u7684\u8ba1\u7b97<\/h5>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8ba1\u7b97\u516c\u5f0f：<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u8fd9\u91cc RefFreq \u4e3a 80 MHz<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u82e5\u6ce2\u7279\u7387\u4e3a 115200 \u5219\u53ef\u5f97：UBMR + 1\/UBIR + 1 =\u00a043.403(\u7ea6\u7b49\u4e8e)<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u4ee4UBIR + 1 = 1000，\u5373UBIR = 999<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u5219UBMR + 1 = 43403，\u5373UBMR = 43402<\/p>\n<\/p>\n

\u4e09. IMX6ULL \u4e32\u53e3\u793a\u4f8b\u4ee3\u7801<\/h2>\n

3.1 \u4e32\u53e3\u521d\u59cb\u5316\u6d41\u7a0b\u4e0e\u4ee3\u7801<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u57fa\u672c\u6d41\u7a0b：\u914d\u7f6e\u5f15\u811a\u590d\u7528\u529f\u80fd—>\u914d\u7f6e\u5f15\u811a\u7535\u6c14\u5c5e\u6027—>\u914d\u7f6e\u4e32\u53e3\u76f8\u5173\u5c5e\u6027：\u590d\u4f4d，\u6821\u9a8c\u4f4d，\u6570\u636e\u4f4d，\u505c\u6b62\u4f4d，\u4f7f\u80fd，\u5206\u9891，\u6ce2\u7279\u7387\u7b49\u7b49<\/p>\n

\/\/\u521d\u59cb\u5316\u4e32\u53e3
\nvoid uart_init(void)
\n{
\n \/\/1\u3001\u914d\u7f6e\u5f15\u811a\u590d\u7528
\n IOMUXC_SetPinMux(IOMUXC_UART1_TX_DATA_UART1_TX, 0);
\n IOMUXC_SetPinMux(IOMUXC_UART1_RX_DATA_UART1_RX, 0);
\n \/\/2\u3001\u914d\u7f6e\u5f15\u811a\u7535\u6c14\u5c5e\u6027
\n IOMUXC_SetPinConfig(IOMUXC_UART1_TX_DATA_UART1_TX, 0x10B0);
\n IOMUXC_SetPinConfig(IOMUXC_UART1_RX_DATA_UART1_RX, 0x10B0);
\n \/\/3\u3001\u5148\u5931\u80fdUART
\n UART1->UCR1 &= ~(1 << 0);
\n \/\/4\u3001\u5148\u590d\u4f4d
\n UART1->UCR2 &= ~(1 << 0);
\n \/\/5\u3001\u5ffd\u7565RTS\u6d41\u63a7\u5f15\u811a
\n UART1->UCR2 |= (1 << 14);
\n \/\/6\u3001\u65e0\u6821\u9a8c\u4f4d
\n UART1->UCR2 &= ~(1 << 8);
\n \/\/7\u3001\u4e00\u4f4d\u505c\u6b62\u4f4d
\n UART1->UCR2 &= ~(1 << 6);
\n \/\/8\u3001\u516b\u4f4d\u6570\u636e\u4f4d
\n UART1->UCR2 |= (1 << 5);
\n \/\/9\u3001\u53d1\u9001\u4f7f\u80fd，\u63a5\u6536\u4f7f\u80fd
\n UART1->UCR2 |= ((1 << 2) | (1 << 1));
\n \/\/10\u3001\u4f7f\u7528\u4ea4\u53c9\u6a21\u5f0f
\n UART1->UCR3 |= (1 << 2);
\n \/\/11\u3001\u8bbe\u7f6e\u4e00\u5206\u9891，\u4e32\u53e3\u65f6\u949f\u4e3a80MHz
\n \/\/UART1->UFCR |= (5 << 7);
\n UART1->UFCR = (5 << 7);<\/p>\n

\/\/12\u3001\u8bbe\u7f6e\u6ce2\u7279\u7387
\n UART1->UBIR = 999;
\n UART1->UBMR = 43402;
\n \/\/13\u3001\u4f7f\u80fd\u4e32\u53e3
\n UART1->UCR1 |= (1 << 0);
\n} <\/p>\n

3.2 \u4e32\u53e3\u53d1\u9001\u793a\u4f8b\u4ee3\u7801<\/h3>\n

\/\/\u4e32\u53e3\u53d1\u9001\u5b57\u7b26\u51fd\u6570
\nvoid putc(unsigned char ch)
\n{
\n \/\/\u4e0a\u4e00\u6b21\u672a\u53d1\u9001\u5b8c\u6210\u5219\u7b49\u5f85
\n while( (UART1->USR2 & (1 << 3)) == 0 );
\n \/\/\u53d1\u9001\u6570\u636e
\n UART1->UTXD = ch;
\n}<\/p>\n

\/\/\u4e32\u53e3\u53d1\u9001\u5b57\u7b26\u4e32
\nvoid puts(const char *p)
\n{
\n while(*p)
\n {
\n putc(*p++);
\n }
\n} <\/p>\n

3.3 \u4e32\u53e3\u63a5\u6536\u793a\u4f8b\u4ee3\u7801<\/h3>\n

\/\/\u4e32\u53e3\u63a5\u6536\u5b57\u7b26
\nunsigned char getc()
\n{
\n while( (UART1->USR2 & (1 << 0)) == 0 );
\n return (UART1->URXD & 0xFF);
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"

\u76ee\u5f55 \u4e00. \u4e32\u53e3\u76f8\u5173\u77e5\u8bc6\u56de\u987e
\n1.1 \u901a\u4fe1\u65b9\u5f0f
\n1.2 \u6570\u636e\u4f20\u8f93\u65b9\u5f0f
\n1.3 \u4e32\u53e3\u4f20\u8f93\u987a\u5e8f
\n1.4 \u4e32\u53e3\u901a\u4fe1\u65f6\u5e8f
\n1.5 \u4e32\u53e3\u6ce2\u7279\u7387
\n1.6 \u4e32\u53e3\u901a\u4fe1\u53c2\u6570
\n1.7 \u5e38\u89c1\u4e32\u53e3\u7535\u5e73\u79cd\u7c7b
\n\u4e8c. IMX6ULL \u4e32\u53e3\u7b80\u4ecb
\n2.1 IMX6ULL \u4e32\u53e3\u7279\u6027
\n2.2 \u4e32\u53e3\u65f6\u949f\u6e90\u7684\u9009\u62e9
\n2.3\u00a0\u5bc4\u5b58\u5668
\n2.3.1\u00a0UARTx_ UCR1 \u4e32\u53e3\u63a7\u5236\u5bc4\u5b58\u56681
\n2.3.2\u00a0UARTx_UCR2 \u4e32\u53e3\u63a7\u5236\u5bc4\u5b58\u56682
\n2.3.3\u00a0UARTx_UCR3 \u4e32\u53e3\u63a7\u5236\u5bc4\u5b58\u56683
\n2<\/p>\n","protected":false},"author":2,"featured_media":82326,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[7880,1757,751,270,269],"topic":[],"class_list":["post-82342","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-uart","tag-arm","tag-270","tag-269"],"yoast_head":"\nARM-IMX6ULL\u7684\u4e32\u53e3UART\u4ecb\u7ecd\uff1a\u76f8\u5173\u5bc4\u5b58\u5668\u8bf4\u660e\u3001\u6ce2\u7279\u7387\u7684\u8ba1\u7b97\u3001\u521d\u59cb\u5316\u65b9\u6cd5\u4e0e\u793a\u4f8b\u4ee3\u7801\u7b49 - \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\/82342.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ARM-IMX6ULL\u7684\u4e32\u53e3UART\u4ecb\u7ecd\uff1a\u76f8\u5173\u5bc4\u5b58\u5668\u8bf4\u660e\u3001\u6ce2\u7279\u7387\u7684\u8ba1\u7b97\u3001\u521d\u59cb\u5316\u65b9\u6cd5\u4e0e\u793a\u4f8b\u4ee3\u7801\u7b49 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u76ee\u5f55 \u4e00. \u4e32\u53e3\u76f8\u5173\u77e5\u8bc6\u56de\u987e 1.1 \u901a\u4fe1\u65b9\u5f0f 1.2 \u6570\u636e\u4f20\u8f93\u65b9\u5f0f 1.3 \u4e32\u53e3\u4f20\u8f93\u987a\u5e8f 1.4 \u4e32\u53e3\u901a\u4fe1\u65f6\u5e8f 1.5 \u4e32\u53e3\u6ce2\u7279\u7387 1.6 \u4e32\u53e3\u901a\u4fe1\u53c2\u6570 1.7 \u5e38\u89c1\u4e32\u53e3\u7535\u5e73\u79cd\u7c7b \u4e8c. 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