编一个stm32控制蓝牙接收字符串的代码

由于 STM32 有多种型号，且每种型号的芯片资源分配不同，因此编写 STM32 控制蓝牙接收字符串的代码需要根据具体的 STM32 型号和蓝牙模块类型进行选择和修改。下面是一个示例代码，以 STM32F103C8T6 为例，使用 HC-05 蓝牙模块：

#include "stm32f10x.h"
#include <stdio.h>
#include <string.h>

#define USARTx USART1
#define USARTx_IRQn USART1_IRQn
#define USARTx_IRQHandler USART1_IRQHandler

#define USART_BAUDRATE 9600
#define USARTx_TX_PIN GPIO_Pin_9
#define USARTx_TX_GPIO_PORT GPIOA
#define USARTx_RX_PIN GPIO_Pin_10
#define USARTx_RX_GPIO_PORT GPIOA

#define BUFFER_SIZE 64

char buffer[BUFFER_SIZE];
uint8_t index = 0;
uint8_t flag = 0;

void USART_Config(void)
{
    USART_InitTypeDef USART_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitStructure.GPIO_Pin = USARTx_TX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = USARTx_RX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = USART_BAUDRATE;
    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(USARTx, &USART_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = USARTx_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_ITConfig(USARTx, USART_IT_RXNE, ENABLE);

    USART_Cmd(USARTx, ENABLE);
}

void USARTx_IRQHandler(void)
{
    if (USART_GetITStatus(USARTx, USART_IT_RXNE) != RESET)
    {
        char data = USART_ReceiveData(USARTx);
        if (data == '\n')
        {
            buffer[index] = '\0';
            flag = 1;
            index = 0;
        }
        else
        {
            buffer[index++] = data;
        }
    }
}

int main(void)
{
    USART_Config();

    while (1)
    {
        if (flag)
        {
            flag = 0;
            printf("Received string: %s\r\n", buffer);
        }
    }
}

该代码使用 USART1 串口收发数据，并配置了中断，当收到一个字符串时，会将其存储在 `buffer` 中，并打印出来。在 HC-05 蓝牙模块连接到 STM32 的 USART1 串口的情况下，当从蓝牙发送一个字符串并以换行符结尾时，就可以在串口调试助手中看到接收到的字符串了。如果使用其他型号的 STM32 或其他类型的蓝牙模块，则需要根据具体情况进行修改。