简介

电脑搭建一个TCP Server， ESP8266 串口设置好透传模式, 再由TCP Server发送指令控制灯的亮灭;
开灯指令： led_on+回车 ； 关灯指令: led_off+回车
主芯片: STM32L431RCT6
LED : PC13 \ 推挽输出即可 \ 高电平点亮
串口: Usart1 / LPUART
ESP8266 : 型号ESP-12F

步骤

设置ESP8266 透传

参考 [ESP8266 TCP/串口透传](https://blog.csdn.net/halo_hsuh/article/details/135134634?spm=1001.2014.3001.5501)

STM32项目创建

参考 BearPi Std 板从入门到放弃 - 引气入体篇（1）(由零创建工程到点亮LED)

初始化与ESP8266的串口LPUART1

开启中断

添加用户代码

/*on :0 : OFF1 : ON
*/
void User_LED_Set(int on)
{HAL_GPIO_WritePin(USER_LED_GPIO_Port, USER_LED_Pin, on ? GPIO_PIN_SET : GPIO_PIN_RESET);
}void Command_Handle(const uint8_t *buf, int length)
{printf ("COMMAND HANDLE\r\n");if ( '\r' == buf[length-1] ){length -= 1;}if (0 == strncmp("led_on", (const char *)buf, length)){HAL_GPIO_WritePin(USER_LED_GPIO_Port, USER_LED_Pin, GPIO_PIN_SET);printf ("led_on!\r\n");}else if (0 == strncmp("led_off", (const char *)buf, length)){HAL_GPIO_WritePin(USER_LED_GPIO_Port, USER_LED_Pin, GPIO_PIN_RESET);printf ("led_off!\r\n");}
}void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{if ( huart->Instance == LPUART1 ){if ( '\n' ==  Cmd_Buffer[Cmd_Index] ){Command_Handle(Cmd_Buffer, Cmd_Index);Cmd_Index = 0;}else{++Cmd_Index;}HAL_UART_Receive_IT(&hlpuart1, &Cmd_Buffer[Cmd_Index], 1);	}
}int fputc(int ch, FILE *f)
{uint8_t temp[1] = {ch};{HAL_UART_Transmit(&huart1, temp, 1, 2);}return HAL_OK;
}int main(void)
{
...
HAL_UART_Receive_IT(&hlpuart1, &Cmd_Buffer[Cmd_Index], 1); // 开启接收
while(1)
{HAL_Delay(1000); // 
}
...
}

代码

完整代码