stm32串口控制LED灯亮灭

以下是一个简单的示例代码，使用STM32的串口控制LED灯的亮灭：

#include "stm32f10x.h"

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
}

void USART_Configuration(void)
{
    USART_InitTypeDef USART_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;

    USART_Init(USART1, &USART_InitStructure);
    USART_Cmd(USART1, ENABLE);
}

int main(void)
{
    GPIO_Configuration();
    USART_Configuration();

    while (1)
    {
        if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET)
        {
            char ch = USART_ReceiveData(USART1);
            if (ch == '1')
            {
                GPIO_SetBits(GPIOC, GPIO_Pin_13);
            }
            else if (ch == '0')
            {
                GPIO_ResetBits(GPIOC, GPIO_Pin_13);
            }
        }
    }
}

这个示例代码将USART1的TX引脚配置为复用推挽输出模式，将PC13引脚配置为输出模式。在主循环中，判断USART1是否有接收到数据，如果有，则读取数据，如果是字符'1'，则点亮PC13引脚对应的LED灯，如果是字符'0'，则关闭LED灯。您可以通过串口终端程序向STM32发送字符'1'或'0'来控制LED灯的亮灭。