2个stm32之间的通信

#include "stm32f10x.h"

void USART_Configuration(void) {
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    // 使能 USART 和 GPIO 时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

    // 配置 USART 引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置 USART 参数
    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_Mode = USART_Mode_Tx;
    USART_Init(USART1, &USART_InitStructure);

    // 使能 USART
    USART_Cmd(USART1, ENABLE);
}

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

int main(void) {
    USART_Configuration();

    while (1) {
        USART_SendData('A');
        delay(1000);
    }
}

#include "stm32f10x.h"

void USART_Configuration(void) {
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    // 使能 USART 和 GPIO 时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

    // 配置 USART 引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置 USART 参数
    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_Mode = USART_Mode_Rx;
    USART_Init(USART1, &USART_InitStructure);

    // 使能 USART
    USART_Cmd(USART1, ENABLE);

    // 使能 USART 中断
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
    NVIC_EnableIRQ(USART1_IRQn);
}

uint8_t receivedData;

void USART1_IRQHandler(void) {
    if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) {
        receivedData = USART_ReceiveData(USART1);
        USART_ClearITPendingBit(USART1, USART_IT_RXNE);
    }
}

int main(void) {
    USART_Configuration();

    while (1) {
        if (receivedData != 0) {
            // 处理接收到的数据
            receivedData = 0;
        }
    }
}