stm32串口控制led亮灭

首先，需要在STM32的开发环境中配置串口。假设你已经完成了这一步，下面是串口控制LED亮灭的基本代码：

#include "stm32f10x.h"

GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

void LED_Init(void) {
    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) {
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

    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);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = 9600;
    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_Rx | USART_Mode_Tx;
    USART_Init(USART1, &USART_InitStructure);
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
    USART_Cmd(USART1, ENABLE);
}

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

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

该代码实现了通过串口接收字符 '1' 或 '0' 控制 LED 灯亮灭。具体操作为，发送 '1' 到串口时，LED 灯亮；发送 '0' 到串口时，LED 灯灭。如果要修改串口波特率，请修改 `USART_InitStructure.USART_BaudRate` 的值。