stm32hal库编写flash程序例程

以下是一个使用STM32Cube HAL库编写的Flash编程示例。该示例演示了如何在STM32F4系列MCU上使用HAL库编程来擦除和编程Flash存储器。

#include "stm32f4xx_hal.h"

/* Private variables ---------------------------------------------------------*/
FLASH_EraseInitTypeDef EraseInitStruct;
uint32_t SectorError = 0;

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Error_Handler(void);

int main(void)
{
  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Enable Flash access */
  __HAL_FLASH_UNLOCK();

  /* Erase the user Flash area
    (area defined by FLASH_USER_START_ADDR and FLASH_USER_END_ADDR) */
  /* Fill EraseInit structure*/
  EraseInitStruct.TypeErase = FLASH_TYPEERASE_SECTORS;
  EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;
  EraseInitStruct.Sector = FLASH_SECTOR_5;
  EraseInitStruct.NbSectors = 4;
  if (HAL_FLASHEx_Erase(&EraseInitStruct, &SectorError) != HAL_OK)
  {
    /*
      Error occurred while sector erase.
      User can add here some code to deal with this error.
      SectorError will contain the faulty sector and then to know the code error on this sector,
      user can call function 'HAL_FLASH_GetError()'
    */
    Error_Handler();
  }

  /* Program the user Flash area word by word 
    (area defined by FLASH_USER_START_ADDR and FLASH_USER_END_ADDR) ***********/

  uint32_t flash_address = FLASH_USER_START_ADDR;
  uint32_t data[3] = {0x12345678, 0x87654321, 0xDEADBEEF};

  for (int i=0; i<3; i++)
  {
    if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, flash_address, data[i]) != HAL_OK)
    {
      /*
        Error occurred while writing.
        User can add here some code to deal with this error.
      */
      Error_Handler();
    }
    flash_address += 4;
  }

  /* Lock the Flash to disable the flash control register access (recommended
     to protect the FLASH memory against possible unwanted operation) *********/
  __HAL_FLASH_LOCK();

  /* Infinite loop */
  while (1)
  {
  }
}

/**
  * @brief  System Clock Configuration
  * @retval None
  */
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_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 buses 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();
  }
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* User can add his own implementation to report the HAL error return state */
  while(1)
  {
  }
}

此示例程序假定您已经定义了以下宏：

#define FLASH_USER_START_ADDR   ADDR_FLASH_SECTOR_5   /* Start @ of user Flash area */
#define FLASH_USER_END_ADDR     ADDR_FLASH_SECTOR_9   /* End @ of user Flash area */

此外，您还需要在链接器脚本（例如，在使用Keil MDK时的“scatter file”）中定义以下符号：

FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 512K

这样可以确保程序不会覆盖Flash中的任何其他部分。