{"id":85301,"date":"2026-07-27T10:56:53","date_gmt":"2026-07-27T02:56:53","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/85301.html"},"modified":"2026-07-27T10:56:53","modified_gmt":"2026-07-27T02:56:53","slug":"stm32-%e4%b8%b2%e5%8f%a3-rs485-iic-%e9%80%9a%e4%bf%a1%e4%b9%b1%e7%a0%81%e3%80%81%e4%b8%a2%e5%8c%85%e5%85%a8%e6%a0%b9%e6%ba%90%e6%b7%b1%e5%ba%a6%e5%89%96%e6%9e%90%ef%bd%9c%e5%b7%a5%e4%b8%9a%e9%a1%b9","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/85301.html","title":{"rendered":"STM32 \u4e32\u53e3 \/ RS485\/IIC \u901a\u4fe1\u4e71\u7801\u3001\u4e22\u5305\u5168\u6839\u6e90\u6df1\u5ea6\u5256\u6790\uff5c\u5de5\u4e1a\u9879\u76ee\u901a\u7528\u6392\u67e5\u4e0e\u6781\u7b80\u4fee\u590d\u65b9\u6848"},"content":{"rendered":"<p>\u4e00\u3001\u524d\u8a00&#xff1a;\u901a\u4fe1\u6545\u969c\u5bf9\u9879\u76ee\u7684\u5f71\u54cd<br \/>\n\u5728\u73af\u5883\u91c7\u96c6\u3001\u65e0\u7ebf\u4e0a\u4f20\u3001\u591a\u4f20\u611f\u5668\u7ec4\u7f51\u9879\u76ee\u4e2d&#xff0c;\u901a\u4fe1\u5f02\u5e38\u4f1a\u5f15\u53d1\u8fde\u9501\u95ee\u9898&#xff1a;<br \/>\n1\u3001\u4e32\u53e3\u6253\u5370\u4ea4\u7ec7\u4e71\u7801&#xff0c;\u8c03\u8bd5\u65e5\u5fd7\u5b8c\u5168\u5931\u6548&#xff1b;<br \/>\n2\u3001Modbus 485 \u9891\u7e41\u4e22\u5e94\u7b54&#xff0c;\u591a\u70b9\u91c7\u96c6\u6570\u636e\u7f3a\u5931&#xff1b;<br \/>\n3\u3001IIC OLED\u3001\u6e29\u6e7f\u5ea6\u4f20\u611f\u5668\u8bfb\u53d6\u51fa\u9519&#xff0c;\u5c4f\u5e55\u82b1\u5c4f&#xff1b;<br \/>\n4\u3001FreeRTOS \u591a\u4efb\u52a1\u5e76\u53d1\u8bbf\u95ee\u603b\u7ebf&#xff0c;\u968f\u673a\u534a\u5305\u3001\u6570\u636e\u9519\u4f4d\u3002<br \/>\n\u5f88\u591a\u5f00\u53d1\u8005\u53ea\u9760\u52a0\u5927\u5ef6\u65f6\u3001\u964d\u4f4e\u6ce2\u7279\u7387\u4e34\u65f6\u7f13\u89e3&#xff0c;\u65e0\u6cd5\u6839\u9664\u95ee\u9898\u3002\u672c\u6587\u4ece\u786c\u4ef6\u7535\u6c14\u3001\u5e95\u5c42\u65f6\u5e8f\u3001\u8f6f\u4ef6\u67b6\u6784\u3001\u591a\u4efb\u52a1\u8d44\u6e90\u7ade\u4e89\u56db\u4e2a\u7ef4\u5ea6\u5b8c\u6574\u62c6\u89e3&#xff0c;\u5206\u603b\u7ebf\u7ed9\u51fa\u5b9a\u4f4d\u65b9\u6cd5\u4e0e\u6839\u6cbb\u4ee3\u7801\u3002<br \/>\n\u4e8c\u3001\u901a\u7528\u5e95\u5c42\u6838\u5fc3\u8bf1\u56e0&#xff08;\u4e09\u7c7b\u603b\u7ebf\u5168\u90e8\u9002\u7528&#xff09;<br \/>\n2.1 \u591a\u4efb\u52a1\u5e76\u53d1\u62a2\u5360\u786c\u4ef6&#xff08;RTOS \u9879\u76ee\u5934\u53f7\u6545\u969c\u6e90&#xff09;<br \/>\n\u4e32\u53e3\u3001IIC\u3001485 \u5c5e\u4e8e\u72ec\u5360\u786c\u4ef6\u8d44\u6e90&#xff0c;\u591a\u4efb\u52a1\u540c\u65f6\u8bfb\u5199\u603b\u7ebf&#xff0c;\u5bc4\u5b58\u5668\u64cd\u4f5c\u88ab\u6253\u65ad&#xff0c;\u76f4\u63a5\u4ea7\u751f\u534a\u5305\u4e71\u7801\u3002<br \/>\n\u9519\u8bef\u573a\u666f&#xff1a;\u91c7\u96c6\u4efb\u52a1\u3001WiFi \u4e0a\u4f20\u4efb\u52a1\u540c\u65f6\u8c03\u7528\u4e32\u53e3\u53d1\u9001\u51fd\u6570\u3002<br \/>\n\u6839\u6cbb\u65b9\u6848&#xff1a;\u4e92\u65a5\u9501\u5305\u88f9\u6240\u6709\u603b\u7ebf\u8bfb\u5199\u64cd\u4f5c\u3002<br \/>\n2.2 \u65e0\u5e27\u5206\u9694\u673a\u5236&#xff0c;\u534a\u5305\u7c98\u5305\u65e0\u6cd5\u533a\u5206<br \/>\n\u63a5\u6536\u7f13\u5b58\u4ec5\u5355\u5b57\u8282\u5b58\u50a8&#xff0c;\u7f3a\u5c11\\\\r\\\\n\u3001\u5e27\u5934\u5e27\u5c3e\u6807\u8bb0&#xff0c;\u4e0a\u4f4d\u673a \/ \u4ece\u673a\u65e0\u6cd5\u62c6\u5206\u5b8c\u6574\u6570\u636e\u5305&#xff0c;\u89e3\u6790\u9519\u4e71\u3002<br \/>\n2.3 \u7f13\u51b2\u533a\u65e0\u8fb9\u754c\u4fdd\u62a4&#xff0c;\u6570\u7ec4\u6ea2\u51fa\u7be1\u6539\u6570\u636e<br \/>\n\u63a5\u6536\u7f13\u5b58\u5199\u5165\u4e0d\u505a\u957f\u5ea6\u5224\u65ad&#xff0c;\u8d85\u957f\u6570\u636e\u6d41\u8986\u76d6\u5806\u6808\u3001\u5168\u5c40\u53d8\u91cf&#xff0c;\u51fa\u73b0\u968f\u673a\u4e22\u5305\u3002<br \/>\n2.4 \u7535\u6e90\u7eb9\u6ce2\u3001\u5730\u7ebf\u73af\u8def\u5e72\u6270<br \/>\n\u603b\u7ebf\u901a\u4fe1\u4f9d\u8d56\u7a33\u5b9a\u7535\u5e73&#xff0c;\u6a21\u5757\u5171\u5730\u4e0d\u826f\u3001\u611f\u6027\u8d1f\u8f7d\u5e72\u6270\u4f1a\u5bfc\u81f4\u7535\u5e73\u7578\u53d8&#xff0c;\u8bc6\u522b\u51fa\u9519\u8bef\u5b57\u8282\u3002<br \/>\n\u4e09\u3001\u5206\u603b\u7ebf&#xff1a;\u4e71\u7801\u4e22\u5305\u6839\u6e90 &#043; \u6781\u7b80\u4fee\u590d\u4ee3\u7801<br \/>\n3.1 USART \u4e32\u53e3&#xff08;\u8c03\u8bd5\u6253\u5370\u3001ESP8266 WiFi&#xff09;<br \/>\n\u6545\u969c\u6839\u6e90<br \/>\n1\u3001\u591a\u4efb\u52a1\u65e0\u4e92\u65a5\u4fdd\u62a4&#xff0c;\u53d1\u9001\u4e2d\u9014\u88ab\u9ad8\u4f18\u5148\u7ea7\u4efb\u52a1\u6253\u65ad&#xff1b;<br \/>\n2\u3001\u4e2d\u65ad\u63a5\u6536\u7f13\u5b58\u65e0\u957f\u5ea6\u9650\u5236&#xff0c;\u6570\u636e\u6ea2\u51fa&#xff1b;<br \/>\n3\u3001AT \u6307\u4ee4\u53d1\u9001\u65e0\u7b49\u5f85 TC \u53d1\u9001\u5b8c\u6210&#xff0c;\u8fde\u7eed\u53d1\u9001\u622a\u65ad\u62a5\u6587&#xff1b;<br \/>\n4\u3001\u6ce2\u7279\u7387\u65f6\u949f\u5206\u9891\u914d\u7f6e\u9519\u8bef&#xff0c;\u91c7\u6837\u504f\u79fb\u4ea7\u751f\u4e71\u7801\u3002<br \/>\n\u6781\u7b80\u4fee\u590d\u4ee3\u7801&#xff1a;\u4e92\u65a5\u9501\u5b89\u5168\u53d1\u9001&#xff08;FreeRTOS&#xff09;<br \/>\nSemaphoreHandle_t uart_mutex;<br \/>\nvoid UART_Safe_Send(uint8_t *buf, uint16_t len)<br \/>\n{<br \/>\nxSemaphoreTake(uart_mutex, portMAX_DELAY);<br \/>\nfor(uint16_t i&#061;0; i&lt;len; i&#043;&#043;)<br \/>\n{<br \/>\nUSART_SendData(USART1, buf[i]);<br \/>\nwhile(USART_GetFlagStatus(USART1, USART_FLAG_TXE) &#061;&#061; RESET);<br \/>\n}<br \/>\n\/\/\u7b49\u5f85\u6574\u5e27\u53d1\u9001\u5b8c\u6210\u518d\u91ca\u653e\u9501<br \/>\nwhile(USART_GetFlagStatus(USART1, USART_FLAG_TC) &#061;&#061; RESET);<br \/>\nxSemaphoreGive(uart_mutex);<br \/>\n}<br \/>\n\u786c\u4ef6\u4f18\u5316<br \/>\n\u6a21\u5757\u4e0e\u5355\u7247\u673a\u5171\u5730&#xff0c;WiFi \u6a21\u5757\u72ec\u7acb 3.3V \u4f9b\u7535&#xff0c;\u907f\u514d\u7535\u6d41\u62c9\u4f4e\u7535\u538b\u5bfc\u81f4\u4e71\u7801\u3002<br \/>\n3.2 RS485 Modbus \u603b\u7ebf&#xff08;\u591a\u4f20\u611f\u5668\u7ec4\u7f51\u9ad8\u9891\u4e22\u5305&#xff09;<br \/>\n\u6545\u969c\u6839\u6e90<br \/>\n1\u3001DE\/RE \u6536\u53d1\u5207\u6362\u65f6\u673a\u9519\u8bef&#xff1a;\u53d1\u9001\u672a\u5b8c\u6210\u5c31\u5207\u63a5\u6536&#xff0c;\u62a5\u6587\u622a\u65ad\u4ece\u673a\u65e0\u5e94\u7b54&#xff1b;<br \/>\n2\u3001\u603b\u7ebf\u4e24\u7aef\u7f3a\u5c11 120\u03a9 \u7ec8\u7aef\u7535\u963b&#xff0c;\u957f\u7ebf\u4fe1\u53f7\u53cd\u5c04\u6ce2\u5f62\u7578\u53d8&#xff1b;<br \/>\n3\u3001A\/B \u5dee\u5206\u7ebf\u63a5\u53cd\u3001\u5e03\u7ebf\u9760\u8fd1\u5f3a\u7535&#xff0c;\u7535\u78c1\u5e72\u6270\u4ea7\u751f\u9519\u8bef\u5b57\u8282&#xff1b;<br \/>\n4\u3001\u8f6e\u8be2\u65e0\u8d85\u65f6\u673a\u5236&#xff0c;\u5355\u53f0\u4ece\u673a\u5361\u6b7b\u6574\u6761\u603b\u7ebf&#xff1b;<br \/>\n5\u3001CRC \u6821\u9a8c\u4ec5\u5355\u6b21\u5224\u65ad&#xff0c;\u5e72\u6270\u5e27\u672a\u8fc7\u6ee4\u76f4\u63a5\u89e3\u6790\u3002<br \/>\n\u65f6\u5e8f\u4fee\u590d\u6838\u5fc3\u7247\u6bb5<br \/>\nvoid RS485_SendFrame(uint8_t *buf, uint8_t len)<br \/>\n{<br \/>\nRS485_TX_EN();<br \/>\nfor(uint8_t i&#061;0; i&lt;len; i&#043;&#043;)<br \/>\n{<br \/>\nUSART_SendData(USART2, buf[i]);<br \/>\nwhile(USART_GetFlagStatus(USART2, USART_FLAG_TXE) &#061;&#061; RESET);<br \/>\n}<br \/>\n\/\/\u5fc5\u987b\u7b49\u5f85\u6574\u5e27\u53d1\u9001\u5b8c\u6bd5\u518d\u5207\u6362\u63a5\u6536<br \/>\nwhile(USART_GetFlagStatus(USART2, USART_FLAG_TC) &#061;&#061; RESET);<br \/>\nRS485_RX_EN();<br \/>\n}<br \/>\n\u5de5\u7a0b\u9632\u62a4\u89c4\u8303<br \/>\n\u603b\u7ebf\u9996\u5c3e\u8bbe\u5907\u5e76\u8054 120\u03a9 \u7535\u963b&#xff1b;A\u3001B \u589e\u52a0 TVS \u9759\u7535\u4fdd\u62a4&#xff1b;\u6bcf\u6761\u4ece\u673a\u67e5\u8be2\u8bbe\u7f6e 200ms \u8d85\u65f6&#xff0c;\u8d85\u65f6\u76f4\u63a5\u8df3\u8fc7\u4e0d\u963b\u585e\u8f6e\u8be2\u3002<br \/>\n3.3 IIC \u603b\u7ebf&#xff08;OLED\u3001SHT30\u3001EEPROM&#xff09;<br \/>\n\u6545\u969c\u6839\u6e90<br \/>\n1\u3001\u591a\u8bbe\u5907 IIC \u603b\u7ebf\u65e0\u5e94\u7b54&#xff0c;SDA \u88ab\u62c9\u4f4e\u5361\u6b7b\u603b\u7ebf&#xff1b;<br \/>\n2\u3001\u65f6\u5e8f\u5ef6\u65f6\u4e0d\u7cbe\u51c6&#xff0c;\u9ad8\u901f IIC \u8bfb\u53d6\u65f6\u4e22\u5b57\u8282&#xff1b;<br \/>\n3\u3001\u591a\u4efb\u52a1\u540c\u65f6\u8bfb\u5199 IIC&#xff0c;\u8d77\u59cb\u4fe1\u53f7\u4e2d\u9014\u88ab\u6253\u65ad&#xff1b;<br \/>\n4\u3001\u4e0a\u62c9\u7535\u963b\u963b\u503c\u4e0d\u5339\u914d&#xff08;4.7K \u6807\u51c6&#xff0c;\u8fc7\u5c0f\u9a71\u52a8\u4e0d\u8db3&#xff09;\u3002<br \/>\n\u603b\u7ebf\u5361\u6b7b\u81ea\u52a8\u6062\u590d\u6781\u7b80\u4ee3\u7801<br \/>\nvoid IIC_ResetBus(void)<br \/>\n{<br \/>\n\/\/\u91ca\u653eSDA&#xff0c;\u65f6\u949f\u8109\u51b29\u6b21\u6062\u590d\u603b\u7ebf<br \/>\nGPIO_SetBits(GPIOB, GPIO_Pin_7);<br \/>\nfor(uint8_t i&#061;0; i&lt;9; i&#043;&#043;)<br \/>\n{<br \/>\nGPIO_ResetBits(GPIOB, GPIO_Pin_6);<br \/>\ndelay_us(5);<br \/>\nGPIO_SetBits(GPIOB, GPIO_Pin_6);<br \/>\ndelay_us(5);<br \/>\n}<br \/>\n}<br \/>\n\u591a\u4efb\u52a1\u9632\u62a4<br \/>\nIIC \u8bfb\u5199\u5168\u7a0b\u52a0\u4e92\u65a5\u9501&#xff1b;\u8bfb\u53d6\u4f20\u611f\u5668\u524d\u589e\u52a0\u603b\u7ebf\u590d\u4f4d&#xff0c;\u9632\u6b62\u5355\u6b21\u901a\u4fe1\u5931\u8d25\u9501\u6b7b\u603b\u7ebf\u3002<br \/>\n\u56db\u3001FreeRTOS \u591a\u4efb\u52a1\u573a\u666f\u4e13\u5c5e\u901a\u4fe1\u9632\u62a4\u67b6\u6784&#xff08;\u6839\u6cbb\u5e76\u53d1\u4e71\u7801&#xff09;<br \/>\n\u7efc\u5408\u9879\u76ee\u4e2d\u540c\u65f6\u5b58\u5728 WiFi \u4e32\u53e3\u3001485 \u603b\u7ebf\u3001IIC \u5c4f\u5e55&#xff0c;\u5fc5\u987b\u7edf\u4e00\u4e09\u5c42\u9632\u62a4&#xff1a;<br \/>\n1\u3001\u786c\u4ef6\u5c42&#xff1a;\u6bcf\u6761\u72ec\u7acb\u603b\u7ebf\u5206\u914d\u4e13\u5c5e\u4e92\u65a5\u9501&#xff0c;\u4e0d\u5171\u7528&#xff1b;<br \/>\n2\u3001\u4f20\u8f93\u5c42&#xff1a;\u63a5\u6536\u7f13\u51b2\u533a\u589e\u52a0\u6700\u5927\u957f\u5ea6\u9650\u5236&#xff0c;\u6ea2\u51fa\u4e22\u5f03\u65b0\u6570\u636e&#xff1b;<br \/>\n3\u3001\u5e94\u7528\u5c42&#xff1a;\u6570\u636e\u5305\u7edf\u4e00\u6dfb\u52a0\\\\r\\\\n\u5e27\u5c3e&#xff0c;\u6536\u5230\u6362\u884c\u518d\u8fdb\u5165\u89e3\u6790\u903b\u8f91\u3002<br \/>\n\u6807\u51c6\u63a5\u6536\u7f13\u5b58\u6a21\u677f&#xff08;\u4e32\u53e3 \/ 485 \u901a\u7528&#xff09;<br \/>\n#define RX_BUF_MAX 32<br \/>\nuint8_t rx_buf[RX_BUF_MAX];<br \/>\nuint8_t rx_cnt &#061; 0;<\/p>\n<p>void USART_RX_Store(uint8_t dat)<br \/>\n{<br \/>\nif(rx_cnt &gt;&#061; RX_BUF_MAX &#8211; 1)<br \/>\n{<br \/>\n\/\/\u6ea2\u51fa\u76f4\u63a5\u6e05\u7a7a\u7f13\u5b58&#xff0c;\u9632\u6b62\u7be1\u6539\u5185\u5b58<br \/>\nmemset(rx_buf, 0, RX_BUF_MAX);<br \/>\nrx_cnt &#061; 0;<br \/>\nreturn;<br \/>\n}<br \/>\nrx_buf[rx_cnt&#043;&#043;] &#061; dat;<br \/>\n\/\/\u68c0\u6d4b\u5e27\u7ed3\u675f\u7b26&#xff0c;\u89e6\u53d1\u89e3\u6790<br \/>\nif(dat &#061;&#061; \u2018\\\\n\u2019)<br \/>\n{<br \/>\nData_Parse(rx_buf, rx_cnt);<br \/>\nmemset(rx_buf, 0, RX_BUF_MAX);<br \/>\nrx_cnt &#061; 0;<br \/>\n}<br \/>\n}<br \/>\n\u4e94\u3001\u6545\u969c\u5feb\u901f\u5b9a\u4f4d\u6d41\u7a0b&#xff08;\u9879\u76ee\u8c03\u8bd5\u76f4\u63a5\u5957\u7528&#xff09;<br \/>\n1\u3001\u533a\u5206\u8f6f\u4ef6 \/ \u786c\u4ef6<br \/>\n\u964d\u4f4e\u6ce2\u7279\u7387\u81f3 9600&#xff0c;\u77ed\u63a5\u7ebf\u6d4b\u8bd5&#xff1b;\u6545\u969c\u6d88\u5931 &#061; \u957f\u7ebf\u786c\u4ef6\u5e72\u6270&#xff0c;\u4f9d\u65e7\u4e71\u7801 &#061; \u8f6f\u4ef6\u65f6\u5e8f \/ \u591a\u4efb\u52a1\u95ee\u9898\u3002<br \/>\n2\u3001\u5c4f\u853d\u5e76\u53d1\u4efb\u52a1<br \/>\n\u4e34\u65f6\u53ea\u4fdd\u7559\u5355\u4e00\u4efb\u52a1\u8bbf\u95ee\u603b\u7ebf&#xff0c;\u901a\u4fe1\u6b63\u5e38\u5219\u662f\u591a\u4efb\u52a1\u8d44\u6e90\u7ade\u4e89\u5bfc\u81f4\u3002<br \/>\n3\u3001\u6293\u5e27\u9a8c\u8bc1<br \/>\n\u4e32\u53e3\u52a9\u624b \/ \u903b\u8f91\u5206\u6790\u4eea\u67e5\u770b\u539f\u59cb\u5b57\u8282&#xff0c;\u5224\u65ad\u662f\u53d1\u9001\u622a\u65ad\u8fd8\u662f\u63a5\u6536\u7535\u5e73\u7578\u53d8\u3002<br \/>\n4\u3001\u5206\u5c42\u6ce8\u91ca\u6392\u67e5<br \/>\n\u4f9d\u6b21\u5c4f\u853d\u53d1\u9001\u4e92\u65a5\u3001\u7f13\u5b58\u8fb9\u754c\u5224\u65ad\u3001\u5e27\u5206\u9694\u903b\u8f91&#xff0c;\u5b9a\u4f4d\u6545\u969c\u4ee3\u7801\u6bb5\u3002<br \/>\n\u516d\u3001\u4e13\u680f\u5bf9\u5e94\u9879\u76ee\u9ad8\u9891\u901a\u4fe1\u6545\u969c\u6c47\u603b<br \/>\n1\u3001\u73af\u5883\u76d1\u6d4b\u4eea IIC-OLED&#xff1a;\u591a\u4efb\u52a1\u5237\u65b0\u65e0\u9501&#xff0c;\u5c4f\u5e55\u82b1\u5c4f\u3001\u5b57\u7b26\u4e71\u7801&#xff1b;<br \/>\n2\u3001RS485 Modbus \u7ec4\u7f51&#xff1a;DE\/RE \u5207\u6362\u8fc7\u65e9&#xff0c;\u4ece\u673a\u4e22\u5e94\u7b54\u3001\u91c7\u96c6\u6570\u636e\u7f3a\u5931&#xff1b;<br \/>\n3\u3001WiFi \u8fdc\u7a0b\u76d1\u6d4b\u4e32\u53e3&#xff1a;\u91c7\u96c6 &#043; \u4e0a\u4f20\u5e76\u53d1\u6253\u5370\u4ea4\u7ec7&#xff0c;\u8c03\u8bd5\u65e5\u5fd7\u5168\u4e71\u7801&#xff1b;<br \/>\n4\u3001\u7efc\u5408 RTOS \u53cc\u65e0\u7ebf\u9879\u76ee&#xff1a;IIC \u603b\u7ebf\u5361\u6b7b&#xff0c;\u6e29\u6e7f\u5ea6\u8bfb\u53d6\u957f\u671f\u5931\u8d25\u3002<br \/>\n\u4e03\u3001\u5de5\u7a0b\u7ea7\u901a\u4fe1\u7a33\u5b9a\u89c4\u8303&#xff08;\u675c\u7edd\u4e71\u7801\u4e22\u5305&#xff09;<br \/>\n1\u3001\u6240\u6709\u603b\u7ebf\u786c\u4ef6\u8bbf\u95ee\u5fc5\u987b\u6210\u5bf9\u52a0\u4e92\u65a5\u9501&#xff0c;\u7981\u6b62\u591a\u4efb\u52a1\u88f8\u8bbf\u95ee&#xff1b;<br \/>\n2\u3001\u53d1\u9001\u51fd\u6570\u5f3a\u5236\u7b49\u5f85 TC \u53d1\u9001\u5b8c\u6210\u6807\u5fd7&#xff0c;\u518d\u91ca\u653e\u786c\u4ef6\u8d44\u6e90&#xff1b;<br \/>\n3\u3001\u63a5\u6536\u7f13\u5b58\u8bbe\u7f6e\u4e0a\u9650&#xff0c;\u6ea2\u51fa\u81ea\u52a8\u6e05\u7a7a&#xff0c;\u675c\u7edd\u6570\u7ec4\u8d8a\u754c&#xff1b;<br \/>\n4\u3001\u6240\u6709\u4e0a\u884c\u6570\u636e\u5305\u6dfb\u52a0\u7edf\u4e00\u5e27\u7ed3\u675f\u7b26&#xff0c;\u534a\u5305\u4e0d\u8fdb\u5165\u89e3\u6790&#xff1b;<br \/>\n5\u3001485 \u957f\u7ebf\u5fc5\u52a0\u7ec8\u7aef\u7535\u963b\u3001TVS \u4fdd\u62a4&#xff0c;IIC \u4f7f\u7528 4.7K \u4e0a\u62c9&#xff1b;<br \/>\n6\u3001\u6240\u6709\u5916\u8bbe\u8bfb\u5199\u589e\u52a0\u8d85\u65f6\u9000\u51fa&#xff0c;\u907f\u514d\u5355\u8bbe\u5907\u6545\u969c\u9501\u6b7b\u6574\u6761\u603b\u7ebf&#xff1b;<br \/>\n7\u3001IIC \u589e\u52a0\u603b\u7ebf\u81ea\u52a8\u590d\u4f4d\u51fd\u6570&#xff0c;\u4e0a\u7535\u3001\u901a\u4fe1\u5931\u8d25\u65f6\u8c03\u7528\u6062\u590d\u3002<br \/>\n\u516b\u3001\u5168\u6587\u603b\u7ed3<br \/>\n1\u3001\u4e32\u53e3\u3001485\u3001IIC \u4e71\u7801\u4e22\u5305\u5206\u4e3a\u8f6f\u4ef6\u65f6\u5e8f\u51b2\u7a81\u3001\u591a\u4efb\u52a1\u8d44\u6e90\u62a2\u5360\u3001\u7f13\u51b2\u533a\u6ea2\u51fa\u3001\u786c\u4ef6\u7535\u6c14\u5e72\u6270\u56db\u5927\u7c7b\u6839\u6e90&#xff1b;<br \/>\n2\u3001\u591a\u4efb\u52a1 RTOS \u9879\u76ee\u5fc5\u987b\u4f9d\u9760\u4e92\u65a5\u9501\u9694\u79bb\u72ec\u5360\u603b\u7ebf&#xff0c;\u662f\u89e3\u51b3\u5e76\u53d1\u4e71\u7801\u6700\u6838\u5fc3\u624b\u6bb5&#xff1b;<br \/>\n3\u3001485 \u6545\u969c\u91cd\u70b9\u7ba1\u63a7\u6536\u53d1\u5207\u6362\u65f6\u5e8f\u4e0e\u957f\u7ebf\u963b\u6297\u5339\u914d&#xff0c;IIC \u91cd\u70b9\u5904\u7406\u603b\u7ebf\u5361\u6b7b\u81ea\u52a8\u590d\u4f4d&#xff1b;<br \/>\n4\u3001\u7f13\u51b2\u533a\u8fb9\u754c\u4fdd\u62a4\u3001\u5e27\u5206\u9694\u3001\u8d85\u65f6\u673a\u5236\u662f\u901a\u7528\u5e95\u5c42\u9632\u62a4&#xff0c;\u6240\u6709\u901a\u4fe1\u9879\u76ee\u5fc5\u987b\u6807\u914d&#xff1b;<br \/>\n5\u3001\u672c\u6587\u4ee3\u7801\u6781\u7b80\u65e0\u5197\u4f59&#xff0c;\u53ef\u76f4\u63a5\u79fb\u690d\u5230\u88f8\u673a\u3001FreeRTOS \u73af\u5883\u76d1\u6d4b\u3001Modbus\u3001WiFi \u5168\u5957\u4e13\u680f\u9879\u76ee&#xff0c;\u5927\u5e45\u63d0\u5347\u8bbe\u5907\u957f\u65f6\u95f4\u8fd0\u884c\u7a33\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u524d\u8a00&#xff1a;\u901a\u4fe1\u6545\u969c\u5bf9\u9879\u76ee\u7684\u5f71\u54cd<br \/>\n\u5728\u73af\u5883\u91c7\u96c6\u3001\u65e0\u7ebf\u4e0a\u4f20\u3001\u591a\u4f20\u611f\u5668\u7ec4\u7f51\u9879\u76ee\u4e2d&#xff0c;\u901a\u4fe1\u5f02\u5e38\u4f1a\u5f15\u53d1\u8fde\u9501\u95ee\u9898&#xff1a;<br \/>\n1\u3001\u4e32\u53e3\u6253\u5370\u4ea4\u7ec7\u4e71\u7801&#xff0c;\u8c03\u8bd5\u65e5\u5fd7\u5b8c\u5168\u5931\u6548&#xff1b;<br \/>\n2\u3001Modbus 485 \u9891\u7e41\u4e22\u5e94\u7b54&#xff0c;\u591a\u70b9\u91c7\u96c6\u6570\u636e\u7f3a\u5931&#xff1b;<br \/>\n3\u3001IIC OLED\u3001\u6e29\u6e7f\u5ea6\u4f20\u611f\u5668\u8bfb\u53d6\u51fa\u9519&#xff0c;\u5c4f\u5e55\u82b1\u5c4f&#xff1b;<br \/>\n4\u3001FreeRTOS \u591a\u4efb\u52a1\u5e76\u53d1\u8bbf\u95ee\u603b\u7ebf&#xff0c;\u968f\u673a\u534a\u5305\u3001\u6570\u636e\u9519\u4f4d\u3002<br \/>\n\u5f88\u591a\u5f00\u53d1\u8005\u53ea\u9760\u52a0\u5927\u5ef6<\/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":[9097,217,270,269],"topic":[],"class_list":["post-85301","post","type-post","status-publish","format-standard","hentry","category-server","tag-9097","tag-stm32","tag-270","tag-269"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>STM32 \u4e32\u53e3 \/ RS485\/IIC \u901a\u4fe1\u4e71\u7801\u3001\u4e22\u5305\u5168\u6839\u6e90\u6df1\u5ea6\u5256\u6790\uff5c\u5de5\u4e1a\u9879\u76ee\u901a\u7528\u6392\u67e5\u4e0e\u6781\u7b80\u4fee\u590d\u65b9\u6848 - \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\/85301.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"STM32 \u4e32\u53e3 \/ RS485\/IIC \u901a\u4fe1\u4e71\u7801\u3001\u4e22\u5305\u5168\u6839\u6e90\u6df1\u5ea6\u5256\u6790\uff5c\u5de5\u4e1a\u9879\u76ee\u901a\u7528\u6392\u67e5\u4e0e\u6781\u7b80\u4fee\u590d\u65b9\u6848 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u4e00\u3001\u524d\u8a00&#xff1a;\u901a\u4fe1\u6545\u969c\u5bf9\u9879\u76ee\u7684\u5f71\u54cd \u5728\u73af\u5883\u91c7\u96c6\u3001\u65e0\u7ebf\u4e0a\u4f20\u3001\u591a\u4f20\u611f\u5668\u7ec4\u7f51\u9879\u76ee\u4e2d&#xff0c;\u901a\u4fe1\u5f02\u5e38\u4f1a\u5f15\u53d1\u8fde\u9501\u95ee\u9898&#xff1a; 1\u3001\u4e32\u53e3\u6253\u5370\u4ea4\u7ec7\u4e71\u7801&#xff0c;\u8c03\u8bd5\u65e5\u5fd7\u5b8c\u5168\u5931\u6548&#xff1b; 2\u3001Modbus 485 \u9891\u7e41\u4e22\u5e94\u7b54&#xff0c;\u591a\u70b9\u91c7\u96c6\u6570\u636e\u7f3a\u5931&#xff1b; 3\u3001IIC OLED\u3001\u6e29\u6e7f\u5ea6\u4f20\u611f\u5668\u8bfb\u53d6\u51fa\u9519&#xff0c;\u5c4f\u5e55\u82b1\u5c4f&#xff1b; 4\u3001FreeRTOS \u591a\u4efb\u52a1\u5e76\u53d1\u8bbf\u95ee\u603b\u7ebf&#xff0c;\u968f\u673a\u534a\u5305\u3001\u6570\u636e\u9519\u4f4d\u3002 \u5f88\u591a\u5f00\u53d1\u8005\u53ea\u9760\u52a0\u5927\u5ef6\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/85301.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-27T02:56:53+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/85301.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/85301.html\",\"name\":\"STM32 \u4e32\u53e3 \/ RS485\/IIC \u901a\u4fe1\u4e71\u7801\u3001\u4e22\u5305\u5168\u6839\u6e90\u6df1\u5ea6\u5256\u6790\uff5c\u5de5\u4e1a\u9879\u76ee\u901a\u7528\u6392\u67e5\u4e0e\u6781\u7b80\u4fee\u590d\u65b9\u6848 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-07-27T02:56:53+00:00\",\"dateModified\":\"2026-07-27T02:56:53+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/85301.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/85301.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/85301.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"STM32 \u4e32\u53e3 \/ RS485\/IIC \u901a\u4fe1\u4e71\u7801\u3001\u4e22\u5305\u5168\u6839\u6e90\u6df1\u5ea6\u5256\u6790\uff5c\u5de5\u4e1a\u9879\u76ee\u901a\u7528\u6392\u67e5\u4e0e\u6781\u7b80\u4fee\u590d\u65b9\u6848\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"STM32 \u4e32\u53e3 \/ RS485\/IIC \u901a\u4fe1\u4e71\u7801\u3001\u4e22\u5305\u5168\u6839\u6e90\u6df1\u5ea6\u5256\u6790\uff5c\u5de5\u4e1a\u9879\u76ee\u901a\u7528\u6392\u67e5\u4e0e\u6781\u7b80\u4fee\u590d\u65b9\u6848 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/85301.html","og_locale":"zh_CN","og_type":"article","og_title":"STM32 \u4e32\u53e3 \/ RS485\/IIC \u901a\u4fe1\u4e71\u7801\u3001\u4e22\u5305\u5168\u6839\u6e90\u6df1\u5ea6\u5256\u6790\uff5c\u5de5\u4e1a\u9879\u76ee\u901a\u7528\u6392\u67e5\u4e0e\u6781\u7b80\u4fee\u590d\u65b9\u6848 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u4e00\u3001\u524d\u8a00&#xff1a;\u901a\u4fe1\u6545\u969c\u5bf9\u9879\u76ee\u7684\u5f71\u54cd \u5728\u73af\u5883\u91c7\u96c6\u3001\u65e0\u7ebf\u4e0a\u4f20\u3001\u591a\u4f20\u611f\u5668\u7ec4\u7f51\u9879\u76ee\u4e2d&#xff0c;\u901a\u4fe1\u5f02\u5e38\u4f1a\u5f15\u53d1\u8fde\u9501\u95ee\u9898&#xff1a; 1\u3001\u4e32\u53e3\u6253\u5370\u4ea4\u7ec7\u4e71\u7801&#xff0c;\u8c03\u8bd5\u65e5\u5fd7\u5b8c\u5168\u5931\u6548&#xff1b; 2\u3001Modbus 485 \u9891\u7e41\u4e22\u5e94\u7b54&#xff0c;\u591a\u70b9\u91c7\u96c6\u6570\u636e\u7f3a\u5931&#xff1b; 3\u3001IIC OLED\u3001\u6e29\u6e7f\u5ea6\u4f20\u611f\u5668\u8bfb\u53d6\u51fa\u9519&#xff0c;\u5c4f\u5e55\u82b1\u5c4f&#xff1b; 4\u3001FreeRTOS \u591a\u4efb\u52a1\u5e76\u53d1\u8bbf\u95ee\u603b\u7ebf&#xff0c;\u968f\u673a\u534a\u5305\u3001\u6570\u636e\u9519\u4f4d\u3002 \u5f88\u591a\u5f00\u53d1\u8005\u53ea\u9760\u52a0\u5927\u5ef6","og_url":"https:\/\/www.wsisp.com\/helps\/85301.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-07-27T02:56:53+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"2 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/85301.html","url":"https:\/\/www.wsisp.com\/helps\/85301.html","name":"STM32 \u4e32\u53e3 \/ RS485\/IIC \u901a\u4fe1\u4e71\u7801\u3001\u4e22\u5305\u5168\u6839\u6e90\u6df1\u5ea6\u5256\u6790\uff5c\u5de5\u4e1a\u9879\u76ee\u901a\u7528\u6392\u67e5\u4e0e\u6781\u7b80\u4fee\u590d\u65b9\u6848 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-07-27T02:56:53+00:00","dateModified":"2026-07-27T02:56:53+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/85301.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/85301.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/85301.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"STM32 \u4e32\u53e3 \/ RS485\/IIC \u901a\u4fe1\u4e71\u7801\u3001\u4e22\u5305\u5168\u6839\u6e90\u6df1\u5ea6\u5256\u6790\uff5c\u5de5\u4e1a\u9879\u76ee\u901a\u7528\u6392\u67e5\u4e0e\u6781\u7b80\u4fee\u590d\u65b9\u6848"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/85301","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=85301"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/85301\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=85301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=85301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=85301"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=85301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}