stm32F4定时器触发双adc同步采样和DMA转运库函数配置代码

以下是一个示例代码，用于配置 STM32F4 的定时器触发双 ADC 同步采样和 DMA 转运的库函数配置：

#include "stm32f4xx.h"

#define ADC1_DR_ADDRESS ((uint32_t)0x4001204C)
#define ADC2_DR_ADDRESS ((uint32_t)0x4001214C)
#define ADC_BUFFER_SIZE 1024

uint16_t adc_buffer1[ADC_BUFFER_SIZE];
uint16_t adc_buffer2[ADC_BUFFER_SIZE];

void ADC_DMA_Config(void)
{
  ADC_InitTypeDef ADC_InitStructure;
  DMA_InitTypeDef DMA_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

  // 使能 ADC1 和 ADC2 的时钟
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_ADC2, ENABLE);

  // 配置 ADC1 和 ADC2 的通用设置
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfConversion = 1;
  ADC_Init(ADC1, &ADC_InitStructure);
  ADC_Init(ADC2, &ADC_InitStructure);

  // 配置 ADC1 和 ADC2 的规则通道
  ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_3Cycles);
  ADC_RegularChannelConfig(ADC2, ADC_Channel_0, 1, ADC_SampleTime_3Cycles);

  // 配置 DMA1 的时钟
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);

  // 配置 DMA1_Stream0，用于 ADC1 的数据转移
  DMA_InitStructure.DMA_Channel = DMA_Channel_0;
  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_ADDRESS;
  DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&adc_buffer1;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_BufferSize = ADC_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(DMA1_Stream0, &DMA_InitStructure);

  // 配置 DMA2_Stream0，用于 ADC2 的数据转移
  DMA_InitStructure.DMA_Channel = DMA_Channel_1;
  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC2_DR_ADDRESS;
  DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&adc_buffer2;
  DMA_Init(DMA1_Stream0, &DMA_InitStructure);

  // 配置定时器触发 ADC1 和 ADC2
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
  TIM_DeInit(TIM2);
  TIM_TimeBaseStructure.TIM_Period = 1000 - 1; // 定时器溢出时间
  TIM_TimeBaseStructure.TIM_Prescaler = (84 - 1); // 定时器预分频系数
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  // 配置 ADC1 和 ADC2 的外部触发源为定时器触发
  ADC_ExternalTrigConvCmd(ADC1, ENABLE);
  ADC_ExternalTrigConvCmd(ADC2, ENABLE);
  ADC_ExternalTrigConvEdgeConfig(ADC1, ADC_ExternalTrigConvEdge_Rising);
  ADC_ExternalTrigConvEdgeConfig(ADC2, ADC_ExternalTrigConvEdge_Rising);

  // 配置 DMA1_Stream0 和 DMA2_Stream0 的传输完成中断
  NVIC_InitStructure.NVIC_IRQChannel = DMA1_Stream0_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  // 使能 DMA1_Stream0 和 DMA2_Stream0 的传输完成中断
  DMA_ITConfig(DMA1_Stream0, DMA_IT_TC, ENABLE);
  DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);

  // 启动 DMA1_Stream0 和 DMA2_Stream0
  DMA_Cmd(DMA1_Stream0, ENABLE);
  DMA_Cmd(DMA2_Stream0, ENABLE);

  // 启动定时器
  TIM_Cmd(TIM2, ENABLE);

  // 启动 ADC1 和 ADC2 的转换
  ADC_Cmd(ADC1, ENABLE);
  ADC_Cmd(ADC2, ENABLE);

  // 启动 ADC1 和 ADC2 的 DMA 传输
  ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
  ADC_DMARequestAfterLastTransferCmd(ADC2, ENABLE);
  ADC_DMACmd(ADC1, ENABLE);
  ADC_DMACmd(ADC2, ENABLE);
}

void DMA1_Stream0_IRQHandler(void)
{
  if (DMA_GetITStatus(DMA1_Stream0, DMA_IT_TCIF0))
  {
    // 处理 DMA1_Stream0 的传输完成中断
    DMA_ClearITPendingBit(DMA1_Stream0, DMA_IT_TCIF0);
  }
}

void DMA2_Stream0_IRQHandler(void)
{
  if (DMA_GetITStatus(DMA2_Stream0, DMA_IT_TCIF0))
  {
    // 处理 DMA2_Stream0 的传输完成中断
    DMA_ClearITPendingBit(DMA2_Stream0, DMA_IT_TCIF0);
  }
}

int main(void)
{
  ADC_DMA_Config();

  while (1)
  {
    // 等待 ADC 转换完成
    while (DMA_GetFlagStatus(DMA1_Stream0, DMA_FLAG_TCIF0) == RESET)
    {
    }

    // 处理 ADC 数据
    for (int i = 0; i < ADC_BUFFER_SIZE; i++)
    {
      printf("ADC1: %d, ADC2: %d\n", adc_buffer1[i], adc_buffer2[i]);
    }

    // 清除标志位
    DMA_ClearFlag(DMA1_Stream0, DMA_FLAG_TCIF0);
  }
}

这段代码配置了 ADC1 和 ADC2 以及相关的 DMA 和定时器，当 DMA 的转换完成中断触发时，可以处理 ADC 数据。你可以根据自己的需要进行修改和扩展。注意，这只是一个示例代码，可能需要根据你的具体硬件和需求进行调整。