main.c

main.c

#include "main.h"


void SystemClock_Config(void);

int main(void)
{

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

	SystemClock_Config();

	//Unlocks the flash
	HAL_FLASH_Unlock();

	//Instantiate the FLASH_EraseInitTypeDef struct needed for the HAL_FLASHEx_Erase() function
	FLASH_EraseInitTypeDef FLASH_EraseInitStruct = {0};

	FLASH_EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;    //Erase type set to erase pages( Available other type is mass erase)
	FLASH_EraseInitStruct.PageAddress = 0x0801FC00;            //Starting address of flash page (0x0800 0000 - 0x0801 FC00)
	FLASH_EraseInitStruct.NbPages = 1;                    //The number of pages to be erased


	uint32_t  errorStatus = 0;

	HAL_FLASHEx_Erase(&FLASH_EraseInitStruct,&errorStatus); //Call the HAL function to erase one page from the flash memory

	uint64_t FData = 0x1A2B3C4D5E6F1234;		// Initialize the data to be written into the flash memory

	HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD,0x0801FC00, FData);  // Calling the HAL function to write the at data at the given memory address
	//Make sure that you have erased the flash memory page which the memory address belongs. Otherwise the data written can have errors.
	



	uint64_t * RDAddr = (uint64_t *)  0x0801FC00;	
	uint64_t RData = *RDAddr;

	while (1){}

}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** 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();
  }
}



/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{ 
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/