STM32103最小系统用手机蓝牙控制开关灯完整代码

以下是一个基于STM32F103最小系统的蓝牙控制LED灯的完整代码：

#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_usart.h"

GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

void GPIO_Configuration(void)
{
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void USART_Configuration(void)
{
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
  
  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_Configuration(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 delay(uint32_t n)
{
  uint32_t i;
  for (i = 0; i < n; i++);
}

void USART_SendChar(char ch)
{
  while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
  USART_SendData(USART1, ch);
}

char USART_ReceiveChar(void)
{
  while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
  return USART_ReceiveData(USART1);
}

int main(void)
{
  char ch;
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
  GPIO_PinRemapConfig(GPIO_Remap_USART1, ENABLE);
  GPIO_Configuration();
  USART_Configuration();
  LED_Configuration();

  while (1)
  {
    ch = USART_ReceiveChar();
    if (ch == '1')
    {
      GPIO_SetBits(GPIOC, GPIO_Pin_13);
      USART_SendChar('L');
    }
    else if (ch == '0')
    {
      GPIO_ResetBits(GPIOC, GPIO_Pin_13);
      USART_SendChar('H');
    }
    else
    {
      USART_SendChar('E');
    }
  }
}

上述代码使用了USART1与蓝牙模块通信，接收蓝牙模块发送的数据后根据数据内容控制LED灯的开关。当接收到字符'1'时，LED灯亮；当接收到字符'0'时，LED灯灭；其他字符则返回'E'表示错误。你可以通过手机蓝牙发送字符'1'或'0'，来控制LED灯的开关。