用STM32F4的库函数写ADC DMA乒乓buffer的代码

以下是用STM32F4库函数写ADC DMA乒乓buffer的代码：

#include "stm32f4xx.h"

#define BUFFER_SIZE 1024 // ADC采样数据的缓冲区大小
#define NUM_BUFFERS 2 // 乒乓缓冲区的数量

volatile uint16_t adc_buffer[NUM_BUFFERS][BUFFER_SIZE]; // 乒乓缓冲区
volatile uint8_t current_buffer = 0; // 当前的缓冲区

void ADC_DMA_Config(void)
{
    ADC_InitTypeDef ADC_InitStructure;
    DMA_InitTypeDef DMA_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;
    
    // 使能GPIO和DMA时钟
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
    // 使能ADC时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
    
    // 配置ADC引脚为模拟输入模式
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    
    // ADC配置
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfConversion = 1;
    ADC_Init(ADC1, &ADC_InitStructure);
    
    // 配置ADC通道
    ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_56Cycles);
    
    // DMA配置
    DMA_InitStructure.DMA_Channel = DMA_Channel_0;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(ADC1->DR);
    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)adc_buffer[current_buffer];
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
    DMA_InitStructure.DMA_BufferSize = BUFFER_SIZE;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    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_Stream0, &DMA_InitStructure);
    
    // 使能DMA流
    DMA_Cmd(DMA2_Stream0, ENABLE);
    
    // 启动ADC转换
    ADC_Cmd(ADC1, ENABLE);
    
    // 启动DMA传输
    DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);
}

void DMA2_Stream0_IRQHandler(void)
{
    if (DMA_GetITStatus(DMA2_Stream0, DMA_IT_TCIF0))
    {
        DMA_ClearITPendingBit(DMA2_Stream0, DMA_IT_TCIF0);
        
        // 切换到下一个缓冲区
        current_buffer = (current_buffer + 1) % NUM_BUFFERS;
        
        // 配置DMA传输到下一个缓冲区
        DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)adc_buffer[current_buffer];
        DMA_Init(DMA2_Stream0, &DMA_InitStructure);
    }
}

int main(void)
{
    ADC_DMA_Config();
    
    while (1)
    {
        // 在这里处理采样数据
    }
}