stm32407，ADC采集数据10秒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 的程序

以下是基于STM32CubeIDE的示例代码，实现了ADC采集数据、DMA搬运数据存储到Flash、从Flash读取数据通过DAC输出。需要注意的是，Flash的写入和擦除操作需要在特定的范围内进行，否则会破坏其他数据。

#include "main.h"
#include "stm32f4xx_hal.h"

/* ADC相关宏定义 */
#define ADC_CHANNEL           ADC_CHANNEL_0
#define ADC_SAMPLE_TIME       ADC_SAMPLETIME_480CYCLES
#define ADC_PRESCALER         ADC_CLOCK_SYNC_PCLK_DIV2
#define ADC_RESOLUTION        ADC_RESOLUTION_12B

/* DMA相关宏定义 */
#define DMA_STREAM            DMA2_Stream0
#define DMA_CHANNEL           DMA_CHANNEL_0

/* Flash相关宏定义 */
#define FLASH_START_ADDR      ((uint32_t)0x08080000)
#define FLASH_END_ADDR        ((uint32_t)0x080FFFFF)
#define FLASH_PAGE_SIZE       ((uint32_t)0x400)

/* DAC相关宏定义 */
#define DAC_CHANNEL           DAC_CHANNEL_1
#define DAC_TRIGGER           DAC_TRIGGER_T6_TRGO

/* 定义变量 */
ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;
DAC_HandleTypeDef hdac;
TIM_HandleTypeDef htim6;

uint16_t adc_data[100];
uint32_t flash_addr = FLASH_START_ADDR;

/* 函数声明 */
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);
static void MX_TIM6_Init(void);

int main(void)
{
  /* 初始化HAL库 */
  HAL_Init();

  /* 配置系统时钟 */
  SystemClock_Config();

  /* 初始化GPIO */
  MX_GPIO_Init();

  /* 初始化DMA */
  MX_DMA_Init();

  /* 初始化ADC */
  MX_ADC1_Init();

  /* 初始化DAC */
  MX_DAC_Init();

  /* 初始化定时器 */
  MX_TIM6_Init();

  /* 启动定时器 */
  HAL_TIM_Base_Start(&htim6);

  /* 启动ADC转换 */
  HAL_ADC_Start_DMA(&hadc1, (uint32_t *)adc_data, 100);

  /* 主循环 */
  while (1)
  {
    /* 等待ADC采样完成 */
    HAL_Delay(10000);

    /* 关闭ADC转换 */
    HAL_ADC_Stop_DMA(&hadc1);

    /* 擦除Flash扇区 */
    HAL_FLASH_Unlock();
    FLASH_Erase_Sector(FLASH_SECTOR_7, VOLTAGE_RANGE_3);
    HAL_FLASH_Lock();

    /* 将采样数据写入Flash */
    for (uint32_t i = 0; i < 100; i++)
    {
      HAL_FLASH_Unlock();
      HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, flash_addr, adc_data[i]);
      HAL_FLASH_Lock();
      flash_addr += 2;
    }
    flash_addr = FLASH_START_ADDR;

    /* 读取Flash中的数据并输出 */
    for (uint32_t i = 0; i < 100; i++)
    {
      uint16_t data = *(uint16_t *)flash_addr;
      HAL_DAC_SetValue(&hdac, DAC_CHANNEL, DAC_ALIGN_12B_R, data);
      flash_addr += 2;
      HAL_Delay(1);
    }
    flash_addr = FLASH_START_ADDR;

    /* 启动ADC转换 */
    HAL_ADC_Start_DMA(&hadc1, (uint32_t *)adc_data, 100);
  }
}

/* GPIO初始化函数 */
void MX_GPIO_Init(void)
{
  /* GPIO初始化结构体定义 */
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* 打开GPIO时钟 */
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /* 配置PA4为DAC输出引脚 */
  GPIO_InitStruct.Pin = GPIO_PIN_4;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* 配置PA0为ADC采样引脚 */
  GPIO_InitStruct.Pin = GPIO_PIN_0;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

/* DMA初始化函数 */
void MX_DMA_Init(void)
{
  /* DMA初始化结构体定义 */
  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_HALFWORD;
  hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
  hdma_adc1.Init.Mode = DMA_CIRCULAR;
  hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;
  hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
  HAL_DMA_Init(&hdma_adc1);

  __HAL_LINKDMA(&hadc1, DMA_Handle, hdma_adc1);

  /* 启动DMA传输 */
  HAL_DMA_Start(&hdma_adc1, (uint32_t)&hadc1.Instance->DR, (uint32_t)adc_data, 100);
}

/* ADC初始化函数 */
void MX_ADC1_Init(void)
{
  /* ADC初始化结构体定义 */
  ADC_ChannelConfTypeDef sConfig = {0};
  ADC_MultiModeTypeDef multimode = {0};

  /* 打开ADC时钟 */
  __HAL_RCC_ADC1_CLK_ENABLE();

  /* 配置ADC参数 */
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_PRESCALER;
  hadc1.Init.Resolution = ADC_RESOLUTION;
  hadc1.Init.ScanConvMode = ENABLE;
  hadc1.Init.ContinuousConvMode = DISABLE;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.NbrOfDiscConversion = 0;
  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;
  hadc1.Init.LowPowerAutoWait = DISABLE;
  hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
  HAL_ADC_Init(&hadc1);

  /* 配置ADC通道 */
  sConfig.Channel = ADC_CHANNEL;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLE_TIME;
  sConfig.SingleDiff = ADC_SINGLE_ENDED;
  sConfig.OffsetNumber = ADC_OFFSET_NONE;
  sConfig.Offset = 0;
  HAL_ADC_ConfigChannel(&hadc1, &sConfig);

  /* 配置ADC多通道模式 */
  multimode.Mode = ADC_MODE_INDEPENDENT;
  HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode);
}

/* DAC初始化函数 */
void MX_DAC_Init(void)
{
  /* DAC初始化结构体定义 */
  DAC_ChannelConfTypeDef sConfig = {0};

  /* 打开DAC时钟 */
  __HAL_RCC_DAC_CLK_ENABLE();

  /* 配置DAC参数 */
  hdac.Instance = DAC;
  HAL_DAC_Init(&hdac);

  /* 配置DAC通道 */
  sConfig.DAC_Trigger = DAC_TRIGGER;
  sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
  HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL);
}

/* 定时器初始化函数 */
void MX_TIM6_Init(void)
{
  /* 定时器初始化结构体定义 */
  TIM_MasterConfigTypeDef sMasterConfig = {0};

  /* 打开定时器时钟 */
  __HAL_RCC_TIM6_CLK_ENABLE();

  /* 配置定时器参数 */
  htim6.Instance = TIM6;
  htim6.Init.Prescaler = 83;
  htim6.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim6.Init.Period = 999;
  HAL_TIM_Base_Init(&htim6);

  /* 配置定时器触发DAC转换 */
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  HAL_TIMEx_MasterConfigSynchronization(&htim6, &sMasterConfig);
}

/* 系统时钟配置函数 */
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 CPU, AHB and APB busses clocks 
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /**Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
      | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}

/* 错误处理函数 */
void Error_Handler(void)
{
  while (1)
  {
  }
}

/* 系统初始化函数 */
void System_Init(void)
{
  /* 初始化HAL库 */
  HAL_Init();

  /* 配置系统时钟 */
  SystemClock_Config();

  /* 初始化GPIO */
  MX_GPIO_Init();

  /* 初始化DMA */
  MX_DMA_Init();

  /* 初始化ADC */
  MX_ADC1_Init();

  /* 初始化DAC */
  MX_DAC_Init();

  /* 初始化定时器 */
  MX_TIM6_Init();

  /* 启动定时器 */
  HAL_TIM_Base_Start(&htim6);

  /* 启动ADC转换 */
  HAL_ADC_Start_DMA(&hadc1, (uint32_t *)adc_data, 100);
}

该代码实现了以下功能：

1. 配置ADC采样引脚PA0和DAC输出引脚PA4。
2. 配置ADC和DMA，启动ADC转换并将采样数据存储在数组中。
3. 关闭ADC转换，擦除Flash扇区，将采样数据写入Flash中。
4. 从Flash中读取采样数据并通过DAC输出。