STM32G474 Nucleo-64 评测之二 双BankFlash一键切换

  while (1)

  {

    /* Wait for User push-button is released */

    if (BSP_PB_GetState(BUTTON_USER) == SET)

    {

      while (BSP_PB_GetState(BUTTON_USER) == SET);



      /* Allow Access to Flash control registers and user Flash */

      HAL_FLASH_Unlock();



      /* Clear OPTVERR bit set on virgin samples */

      __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPTVERR);



      /* Allow Access to option bytes sector */

      HAL_FLASH_OB_Unlock();



      /* Get the Dual boot configuration status */

      HAL_FLASHEx_OBGetConfig(&OBInit);



      /* Enable/Disable dual boot feature */

      OBInit.OptionType = OPTIONBYTE_USER;   

      OBInit.USERType   = OB_USER_BFB2;



      if (((OBInit.USERConfig) & (OB_BFB2_ENABLE)) == OB_BFB2_ENABLE)

      {

        OBInit.USERConfig = OB_BFB2_DISABLE;

      }

      else

      {

        OBInit.USERConfig = OB_BFB2_ENABLE;

      }



      if(HAL_FLASHEx_OBProgram (&OBInit) != HAL_OK)

      {

        /*

        Error occurred while setting option bytes configuration.

        User can add here some code to deal with this error.

        To know the code error, user can call function 'HAL_FLASH_GetError()'

        */

        /* Infinite loop */

        while (1)

        {

          /* Make LED2 blink (100ms on, 2s off) to indicate error */

          BSP_LED_On(LED2);

          HAL_Delay(100);

          BSP_LED_Off(LED2);

          HAL_Delay(2000);

        }

      }



      /* Start the Option Bytes programming process */

      if (HAL_FLASH_OB_Launch() != HAL_OK)

      {

        /*

        Error occurred while reloading option bytes configuration.

        User can add here some code to deal with this error.

        To know the code error, user can call function 'HAL_FLASH_GetError()'

        */

        /* Infinite loop */

        while (1)

        {

          /* Make LED2 blink (100ms on, 2s off) to indicate error */

          BSP_LED_On(LED2);

          HAL_Delay(100);

          BSP_LED_Off(LED2);

          HAL_Delay(2000);

        }

      }



      /* Prevent Access to option bytes sector */

      HAL_FLASH_OB_Lock();



      /* Disable the Flash option control register access (recommended to protect

      the option Bytes against possible unwanted operations) */

      HAL_FLASH_Lock();



    }

    else

    {

#ifdef FLASH_BANK1

      /* Toggle LED1 */

      BSP_LED_Toggle(LED2);

          HAL_UART_Transmit(&hlpuart1,(uint8_t*)"this is bank1",13,5000);

          HAL_Delay(50);

#else



    /* USER CODE END WHILE */

        

    /* USER CODE BEGIN 3 */

        BSP_LED_Toggle(LED2);

        HAL_UART_Transmit(&hlpuart1,(uint8_t*)"this is bank2",13,5000);

        HAL_Delay(1000);

#endif

        }

  }