stm32f407的uart中断接收程序

以下是简单的UART中断接收程序示例，适用于STM32F407：

#include "stm32f4xx.h"

#define BUFFER_SIZE 256

volatile uint8_t rx_buffer[BUFFER_SIZE];
volatile uint8_t rx_index = 0;

void USART2_IRQHandler(void)
{
    if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
    {
        uint8_t data = USART_ReceiveData(USART2);
        rx_buffer[rx_index++] = data;
        if(rx_index >= BUFFER_SIZE)
        {
            rx_index = 0;
        }
    }
}

int main(void)
{
    // Enable the USART2 Clock
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);

    // Configure PA2 as USART2 TX
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_StructInit(&GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);

    // Configure PA3 as USART2 RX
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);

    // Configure USART2
    USART_InitTypeDef USART_InitStructure;
    USART_StructInit(&USART_InitStructure);
    USART_InitStructure.USART_BaudRate = 115200;
    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(USART2, &USART_InitStructure);

    // Enable USART2 RX Interrupt
    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

    // Enable USART2
    USART_Cmd(USART2, ENABLE);

    while (1)
    {
        // Do something with the received data in the rx_buffer
        // ...
    }
}

在该示例中，设置了串口2的波特率为115200，并启用接收中断。在中断中，将接收到的数据存储在名为rx_buffer的数组中，并将rx_index递增以指向下一个空闲位置。在主循环中，开发人员可以处理rx_buffer中的接收数据。请注意，这只是一个简单的示例，应根据特定应用程序进行修改。