实验原理：

　　开发板上自带一片CH340芯片，完成本实验电脑需要安装CH340驱动，

CH340的TXD连接STM32的GPIO（PXC7），CH340的RXD连接STM32的

GPIO（PC6），通过串口发送命令控制LED的亮灭。串口命令如下：

LED_RED_ON\CR\LF---------------------LED红灯亮

LED_RED_OFF\CR\LF-------------------LED红灯灭

LED_BLUE_ON\CR\LF-------------------LED蓝灯亮

LED_BLUE_OFF\CR\LF------------------LED蓝灯灭

LED_GREEN_ON\CR\LF-----------------LED绿灯亮

LED_GREEN_OFF\CR\LF---------------LED绿灯灭

实验现象：

　　打开串口软件通过串口输入相应的命令，控制LED的状态。

int main(void){  /* USER CODE BEGIN 1 */    int i;    char buffer[20];  /* USER CODE END 1 */  /* MCU Configuration----------------------------------------------------------*/  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */  HAL_Init();  /* USER CODE BEGIN Init */  /* USER CODE END Init */  /* Configure the system clock */  SystemClock_Config();  /* USER CODE BEGIN SysInit */  /* USER CODE END SysInit */  /* Initialize all configured peripherals */  MX_GPIO_Init();  MX_USART6_UART_Init();  /* USER CODE BEGIN 2 */    usart6.initialize(9600);                                                                                          //´®¿Ú²¨ÌØÉèÖà    usart6.printf("Hello, I am iCore4!\r\n");                                                            //´®¿ÚÐÅÏ¢Êä³ö   /* USER CODE END 2 */  /* Infinite loop */  /* USER CODE BEGIN WHILE */  while (1)  {  /* USER CODE END WHILE */  /* USER CODE BEGIN 3 */        if(usart6.receive_ok_flag){                                          //½ÓÊÕÍê³É            usart6.receive_ok_flag = 0;            for(i = 0;i < 20;i++){                buffer[i] = tolower(usart6.receive_buffer[i]);            }                        if(memcmp(buffer,"led_red_on",strlen("led_red_on")) == 0){                LED_RED_ON;                usart6.printf("ok!\r\n");            }            if(memcmp(buffer,"led_red_off",strlen("led_red_off")) == 0){                LED_RED_OFF;                usart6.printf("ok!\r\n");            }                if(memcmp(buffer,"led_green_on",strlen("led_green_on")) == 0){                LED_GREEN_ON;                usart6.printf("ok!\r\n");            }                if(memcmp(buffer,"led_green_off",strlen("led_green_off")) == 0){                LED_GREEN_OFF;                usart6.printf("ok!\r\n");            }                if(memcmp(buffer,"led_blue_on",strlen("led_blue_on")) == 0){                LED_BLUE_ON;                usart6.printf("ok!\r\n");            }                if(memcmp(buffer,"led_blue_off",strlen("led_blue_off")) == 0){                LED_BLUE_OFF;                usart6.printf("ok!\r\n");            }                        }  }  /* USER CODE END 3 */}

 

源代码下载链接：

链接： 密码：a849

iCore4链接：