STM32F407ZGT6 串口空闲中断代码

以下是使用STM32F407ZGT6的串口空闲中断处理的示例代码：

#include "stm32f4xx.h"
#include "stdio.h"

#define UART_RX_BUFFER_SIZE 256

volatile uint8_t uart_rx_buffer[UART_RX_BUFFER_SIZE];
volatile uint16_t uart_rx_buffer_index = 0;

void USART1_IRQHandler(void)
{
    if (USART_GetITStatus(USART1, USART_IT_IDLE) != RESET)
    {
        // 清除IDLE标志位
        volatile uint32_t tmp = USART1->SR;
        tmp = USART1->DR;

        // 处理接收到的数据
        uint16_t rx_data_len = UART_RX_BUFFER_SIZE - DMA_GetCurrDataCounter(DMA2_Stream2);
        for (uint16_t i = 0; i < rx_data_len; i++)
        {
            uart_rx_buffer[uart_rx_buffer_index++] = DMA2_Stream2->M0AR[i];
            if (uart_rx_buffer_index >= UART_RX_BUFFER_SIZE)
            {
                uart_rx_buffer_index = 0;
            }
        }

        // 重新启动DMA接收
        DMA_Cmd(DMA2_Stream2, DISABLE);
        DMA_ClearFlag(DMA2_Stream2, DMA_FLAG_TCIF2 | DMA_FLAG_HTIF2 | DMA_FLAG_FEIF2 | DMA_FLAG_DMEIF2 | DMA_FLAG_TEIF2);
        DMA_SetCurrDataCounter(DMA2_Stream2, UART_RX_BUFFER_SIZE);
        DMA_Cmd(DMA2_Stream2, ENABLE);
    }
}

void USART_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;
    DMA_InitTypeDef DMA_InitStructure;

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);

    // USART1 Rx - PA10
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);

    // USART1 配置
    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_Init(USART1, &USART_InitStructure);

    // DMA2 Stream2 配置
    DMA_DeInit(DMA2_Stream2);
    DMA_InitStructure.DMA_Channel = DMA_Channel_4;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(USART1->DR);
    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)uart_rx_buffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
    DMA_InitStructure.DMA_BufferSize = UART_RX_BUFFER_SIZE;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
    DMA_Init(DMA2_Stream2, &DMA_InitStructure);

    // 使能DMA接收
    DMA_Cmd(DMA2_Stream2, ENABLE);

    // 使能USART1接收中断
    USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);

    // 配置中断优先级
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

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

这段代码实现了接收到串口数据后的空闲中断处理，将接收到的数据存储在`uart_rx_buffer`数组中。你可以根据自己的需求修改代码，并根据需要进行数据处理。