stm32 dma 传输adc代码

下面是一个基于STM32的DMA传输ADC数据的示例代码，供参考：

#include "stm32f10x.h"

#define ADC1_DR_Address ((u32)0x4001244C) // ADC1 data register address
#define ADC_CHANNEL_NUM 1 // ADC channel number
#define ADC_SAMPLE_NUM 10 // ADC sample number
#define ADC_DMA_BUF_SIZE (ADC_CHANNEL_NUM * ADC_SAMPLE_NUM) // ADC DMA buffer size

uint16_t adc_data[ADC_DMA_BUF_SIZE]; // ADC DMA buffer

void ADC1_GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  // Enable ADC1 and GPIOA clock
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);

  // Configure PA0 as analog input
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void ADC1_DMA_Configuration(void)
{
  DMA_InitTypeDef DMA_InitStructure;

  // Enable DMA1 clock
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

  // Configure DMA1 Channel1
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&adc_data;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = ADC_DMA_BUF_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_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel1, &DMA_InitStructure);

  // Enable DMA1 Channel1
  DMA_Cmd(DMA1_Channel1, ENABLE);
}

void ADC1_Configuration(void)
{
  ADC_InitTypeDef ADC_InitStructure;

  // Enable ADC1 clock
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

  // ADC1 configuration
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = ADC_CHANNEL_NUM;
  ADC_Init(ADC1, &ADC_InitStructure);

  // ADC1 regular channel configuration
  ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_28Cycles5);

  // Enable ADC1 DMA
  ADC_DMACmd(ADC1, ENABLE);

  // Enable ADC1
  ADC_Cmd(ADC1, ENABLE);

  // Start ADC1 Software Conversion
  ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}

int main(void)
{
  // Configure ADC1 GPIO
  ADC1_GPIO_Configuration();

  // Configure ADC1 DMA
  ADC1_DMA_Configuration();

  // Configure ADC1
  ADC1_Configuration();

  while (1)
  {
    // Do something with the ADC data
  }
}

上述代码中，我们首先定义了一个ADC DMA缓冲区`adc_data`，其大小为`ADC_DMA_BUF_SIZE`。然后在`ADC1_Configuration`函数中，我们使能了ADC1，并配置了ADC1的扫描模式、转换通道和采样时间。同时，我们还使能了ADC1的DMA功能，并开启了ADC1的软件转换。

在`main`函数中，我们可以通过访问`adc_data`数组来获取DMA传输的ADC数据。