stm32407，ADC采集数据DMA搬运数据存到flash里面，在从flash里面读出数据通过DAC输出出来

好的，这个任务可以分成几个步骤来实现：

1. 初始化ADC模块，设置采样率、采样时间等参数，并启动ADC模块；
2. 初始化DMA模块，设置传输数据的起点、终点、数据大小等参数，并启动DMA传输；
3. 在DMA传输完成后，将数据存入Flash中；
4. 从Flash中读取数据，并通过DAC输出。

以下是一个简单的代码示例，供参考：

#include "stm32f4xx.h"
#include "stm32f4xx_hal.h"
#include "stm32f4xx_hal_adc.h"
#include "stm32f4xx_hal_dac.h"
#include "stm32f4xx_hal_flash.h"
#include "stm32f4xx_hal_dma.h"

#define ADC_BUFFER_SIZE 1024
#define FLASH_ADDRESS   0x080E0000

ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;
DAC_HandleTypeDef hdac;
FLASH_EraseInitTypeDef flashErase;
__IO uint32_t ADCBuffer[ADC_BUFFER_SIZE];

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_ADC1_Init(void);
static void MX_DAC_Init(void);
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc);
void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc);
void HAL_DAC_MspInit(DAC_HandleTypeDef* hdac);
void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc);
void HAL_DAC_MspDeInit(DAC_HandleTypeDef* hdac);

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_ADC1_Init();
  MX_DAC_Init();

  HAL_ADC_Start_DMA(&hadc1, (uint32_t*)ADCBuffer, ADC_BUFFER_SIZE);

  while (1)
  {
    // 等待DMA传输完成
    while (!HAL_DMA_GetState(&hdma_adc1));

    // 将数据存入Flash
    HAL_FLASH_Unlock();
    flashErase.TypeErase = FLASH_TYPEERASE_SECTORS;
    flashErase.Sector = FLASH_SECTOR_11;
    flashErase.NbSectors = 1;
    flashErase.VoltageRange = FLASH_VOLTAGE_RANGE_3;
    uint32_t SectorError = 0;
    HAL_FLASHEx_Erase(&flashErase, &SectorError);
    for (uint32_t i = 0; i < ADC_BUFFER_SIZE; i++)
    {
      HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, FLASH_ADDRESS + i * 4, ADCBuffer[i]);
    }
    HAL_FLASH_Lock();

    // 从Flash中读取数据，并通过DAC输出
    for (uint32_t i = 0; i < ADC_BUFFER_SIZE; i++)
    {
      HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_12B_R, *((uint32_t*)(FLASH_ADDRESS + i * 4)));
      HAL_Delay(1);
    }
  }
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage 
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 25;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 7;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                          |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_ADC1_Init(void)
{
  ADC_ChannelConfTypeDef sConfig = {0};

  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.ScanConvMode = ENABLE;
  hadc1.Init.ContinuousConvMode = DISABLE;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.NbrOfConversion = 1;
  hadc1.Init.DMAContinuousRequests = ENABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }

  sConfig.Channel = ADC_CHANNEL_0;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_DAC_Init(void)
{
  DAC_ChannelConfTypeDef sConfig = {0};

  hdac.Instance = DAC;
  if (HAL_DAC_Init(&hdac) != HAL_OK)
  {
    Error_Handler();
  }

  sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
  sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
  if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_DMA_Init(void)
{
  __HAL_RCC_DMA1_CLK_ENABLE();

  hdma_adc1.Instance = DMA2_Stream0;
  hdma_adc1.Init.Channel = DMA_CHANNEL_0;
  hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
  hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
  hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
  hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
  hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
  hdma_adc1.Init.Mode = DMA_CIRCULAR;
  hdma_adc1.Init.Priority = DMA_PRIORITY_HIGH;
  hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
  if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
  {
    Error_Handler();
  }

  __HAL_LINKDMA(&hadc1, DMA_Handle, hdma_adc1);
}

void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(hadc->Instance==ADC1)
  {
    __HAL_RCC_ADC1_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();

    GPIO_InitStruct.Pin = GPIO_PIN_0;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
  }
}

void HAL_DAC_MspInit(DAC_HandleTypeDef* hdac)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(hdac->Instance==DAC)
  {
    __HAL_RCC_DAC_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();

    GPIO_InitStruct.Pin = GPIO_PIN_4;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
  }
}

void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc)
{
  if(hadc->Instance==ADC1)
  {
    __HAL_RCC_ADC1_CLK_DISABLE();

    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_0);
  }
}

void HAL_DAC_MspDeInit(DAC_HandleTypeDef* hdac)
{
  if(hdac->Instance==DAC)
  {
    __HAL_RCC_DAC_CLK_DISABLE();

    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_4);
  }
}

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
  // DMA中断回调函数，不需要额外的处理
}

需要注意的是，这段代码中的Flash操作部分可能会存在问题，因为Flash一般需要先进行擦除操作，才能进行写入操作。在这段代码中，我使用了HAL库提供的擦除函数，但是并没有考虑Flash的耐久性问题，实际使用时还需要根据实际情况进行优化。