uart点亮led，用stm32上的c语言来编写这个程序

以下是使用STM32上的C语言编写的UART点亮LED程序：

#include "stm32f10x.h"

GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

void USART1_Init(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_Cmd(USART1, ENABLE);
}

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);
}

int main(void)
{
  USART1_Init();
  LED_Init();

  while (1)
  {
    while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
    char received_char = USART_ReceiveData(USART1);

    if (received_char == '1')
    {
      GPIO_SetBits(GPIOC, GPIO_Pin_13);
    }
    else if (received_char == '0')
    {
      GPIO_ResetBits(GPIOC, GPIO_Pin_13);
    }
  }
}

该程序使用USART1的RX和TX引脚与PC进行通信，当接收到字符'1'时，点亮LED，当接收到字符'0'时，熄灭LED。在程序中，使用GPIO库初始化LED引脚和USART库初始化USART1。在主循环中，使用USART_GetFlagStatus函数检查USART1是否收到了数据。如果收到了，程序将读取接收的字符并根据其值控制LED的状态。