hal库基于stm32f407 写出ADC读取语音电信号，内部flash存储10sADC读取的语音信号，后用dac再将flash内部信号输出，实现语音回放掉电存储的代码

以下是基于STM32F407的HAL库的ADC读取语音电信号、内部Flash存储10s ADC读取的语音信号、用DAC将Flash内部信号输出的代码：

#include "stm32f4xx_hal.h"
#include "stm32f4xx_hal_flash.h"
#include "stm32f4xx_hal_dac.h"

#define FLASH_START_ADDR    ((uint32_t)0x080E0000) // Internal flash start address
#define FLASH_SECTOR        FLASH_SECTOR_11       // Internal flash sector for storage
#define AUDIO_SAMPLE_RATE   8000                  // Audio sample rate in Hz
#define AUDIO_SAMPLE_SIZE   16                    // Audio sample size in bits
#define AUDIO_BUFFER_SIZE   (AUDIO_SAMPLE_RATE * 10 * AUDIO_SAMPLE_SIZE / 8) // Audio buffer size in bytes

ADC_HandleTypeDef hadc1;
DAC_HandleTypeDef hdac;
FLASH_EraseInitTypeDef flashErase;
uint8_t audioBuffer[AUDIO_BUFFER_SIZE];

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC1_Init(void);
static void MX_DAC_Init(void);
static void MX_NVIC_Init(void);

int main(void) {
  uint32_t flashAddress = FLASH_START_ADDR;
  uint32_t audioSampleCount = AUDIO_SAMPLE_RATE * 10;
  uint32_t audioSampleSize = AUDIO_SAMPLE_SIZE / 8;
  uint32_t audioBufferSize = audioSampleCount * audioSampleSize;
  uint32_t audioBufferIndex = 0;
  
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_ADC1_Init();
  MX_DAC_Init();
  MX_NVIC_Init();
  
  HAL_ADC_Start(&hadc1);
  HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
  
  while (1) {
    uint32_t adcValue = HAL_ADC_GetValue(&hadc1);
    audioBuffer[audioBufferIndex++] = (uint8_t)(adcValue & 0xFF);
    audioBuffer[audioBufferIndex++] = (uint8_t)(adcValue >> 8);
    
    if (audioBufferIndex >= audioBufferSize) {
      HAL_DAC_Stop(&hdac, DAC_CHANNEL_1);
      
      HAL_FLASH_Unlock();
      flashErase.TypeErase = TYPEERASE_SECTORS;
      flashErase.Sector = FLASH_SECTOR;
      flashErase.NbSectors = 1;
      flashErase.VoltageRange = VOLTAGE_RANGE_3;
      uint32_t sectorError;
      HAL_FLASHEx_Erase(&flashErase, &sectorError);
      
      for (uint32_t i = 0; i < audioBufferSize; i += 4) {
        uint32_t data = *(uint32_t *)(audioBuffer + i);
        HAL_FLASH_Program(TYPEPROGRAM_WORD, flashAddress + i, data);
      }
      
      HAL_FLASH_Lock();
      
      audioBufferIndex = 0;
      HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
    }
  }
}

void SystemClock_Config(void) {
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 16;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
  RCC_OscInitStruct.PLL.PLLQ = 7;
  HAL_RCC_OscConfig(&RCC_OscInitStruct);
  
  RCC_ClkInitStruct.ClockType = 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;
  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
  
  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq() / 1000);
  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
}

static void MX_ADC1_Init(void) {
  ADC_ChannelConfTypeDef sConfig;
  
  __HAL_RCC_ADC1_CLK_ENABLE();
  
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.ScanConvMode = DISABLE;
  hadc1.Init.ContinuousConvMode = ENABLE;
  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;
  HAL_ADC_Init(&hadc1);
  
  sConfig.Channel = ADC_CHANNEL_0;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
  HAL_ADC_ConfigChannel(&hadc1, &sConfig);
}

static void MX_DAC_Init(void) {
  DAC_ChannelConfTypeDef sConfig;
  
  __HAL_RCC_DAC_CLK_ENABLE();
  
  hdac.Instance = DAC;
  HAL_DAC_Init(&hdac);
  
  sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
  sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
  HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1);
}

static void MX_GPIO_Init(void) {
  __HAL_RCC_GPIOA_CLK_ENABLE();
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  
  GPIO_InitStruct.Pin = GPIO_PIN_0;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

static void MX_NVIC_Init(void) {
  HAL_NVIC_SetPriority(DMA1_Stream5_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Stream5_IRQn);
}

void DMA1_Stream5_IRQHandler(void) {
  HAL_DMA_IRQHandler(&hdac);
}

这个代码中，我们使用`HAL_ADC_GetValue()`函数从ADC读取语音信号，并将其存储在一个缓冲区中。当缓冲区被填满时，我们停止DAC并将缓冲区中的数据存储到内部Flash中。然后，我们重置缓冲区并开始DAC以回放存储的语音信号。