stm32蓝牙小车代码

以下是基于STM32单片机和HC-05蓝牙模块的小车控制代码，你可以根据自己的需要进行修改：

#include "stm32f10x.h"

#define CMD_FORWARD   'w'
#define CMD_BACKWARD  's'
#define CMD_LEFT      'a'
#define CMD_RIGHT     'd'
#define CMD_STOP      'x'

void delay_ms(uint32_t ms);
void uart_init(uint32_t baudrate);
void uart_send_byte(uint8_t data);
void motor_control(char cmd);

int main(void) {
  uart_init(9600);
  while (1) {
    char cmd = getchar();
    motor_control(cmd);
  }
}

void delay_ms(uint32_t ms) {
  uint32_t i, j;
  for (i = 0; i < ms; i++)
    for (j = 0; j < 5000; j++);
}

void uart_init(uint32_t baudrate) {
  GPIO_InitTypeDef GPIO_InitStruct;
  USART_InitTypeDef USART_InitStruct;
  NVIC_InitTypeDef NVIC_InitStruct;

  // enable clock for GPIOA and USART2
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_USART1, ENABLE);

  // configure USART2 TX (PA2) and RX (PA3) as alternate function push-pull
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStruct);

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

  // configure USART2
  USART_InitStruct.USART_BaudRate = baudrate;
  USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStruct.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
  USART_InitStruct.USART_Parity = USART_Parity_No;
  USART_InitStruct.USART_StopBits = USART_StopBits_1;
  USART_InitStruct.USART_WordLength = USART_WordLength_8b;
  USART_Init(USART1, &USART_InitStruct);

  // enable USART2 IRQ in NVIC
  NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn;
  NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
  NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;
  NVIC_Init(&NVIC_InitStruct);

  // enable USART2 RX interrupt
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

  // enable USART2
  USART_Cmd(USART1, ENABLE);
}

void uart_send_byte(uint8_t data) {
  while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
  USART_SendData(USART1, data);
}

void motor_control(char cmd) {
  switch (cmd) {
    case CMD_FORWARD:
      // code to move the car forward
      break;
    case CMD_BACKWARD:
      // code to move the car backward
      break;
    case CMD_LEFT:
      // code to turn the car left
      break;
    case CMD_RIGHT:
      // code to turn the car right
      break;
    case CMD_STOP:
      // code to stop the car
      break;
    default:
      // invalid command, do nothing
      break;
  }
}

注意，以上代码仅供参考，具体实现需要根据你的硬件和需求进行修改。