【ST测评】STM32H7A NUCLEO开发板上进行低功耗测试

/**

  * [url=home.php?mod=space&uid=247401]@brief[/url]  Main program

  * @param  None

  * @retval None

  */

int main(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;

  

  

  /* Enable the CPU Cache */

  CPU_CACHE_Enable();



  /* STM32H7xx HAL library initialization:

       - Systick timer is configured by default as source of time base, but user

         can eventually implement his proper time base source (a general purpose

         timer for example or other time source), keeping in mind that Time base

         duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and

         handled in milliseconds basis.

       - Set NVIC Group Priority to 4

       - Low Level Initialization

     */

  HAL_Init();



  /* Configure LED1, and LED3 */

  BSP_LED_Init(LED1);

  BSP_LED_Init(LED3);



  /* Configure the system clock to 280 MHz */

  SystemClock_Config();

  

  /* Configure the RTC */

  RTC_Config();



  while (1)

  {

    fail_number = 0;



    /* Fill AXISRAM1 Memory */

    for (int count = 0; count < (CD_AXISRAM1_SIZE / CD_AXI_DATAWIDTH); count++)

    {

      *(uint64_t *)(CD_AXISRAM1_BASE + (count * CD_AXI_DATAWIDTH)) = Data64;

    }



    /* Insert 5 second delay */

    HAL_Delay(5000);

    



      /* Enable GPIOs clock */

  __HAL_RCC_GPIOA_CLK_ENABLE();

  __HAL_RCC_GPIOB_CLK_ENABLE();

  __HAL_RCC_GPIOC_CLK_ENABLE();

  __HAL_RCC_GPIOD_CLK_ENABLE();

  __HAL_RCC_GPIOE_CLK_ENABLE();

  __HAL_RCC_GPIOF_CLK_ENABLE();

  __HAL_RCC_GPIOG_CLK_ENABLE();        

  __HAL_RCC_GPIOH_CLK_ENABLE();



  /* Configure all GPIO port pins in Analog Input mode (floating input trigger OFF) */

  /* Note: Debug using ST-Link is not possible during the execution of this   */

  /*       example because communication between ST-link and the device       */

  /*       under test is done through UART. All GPIO pins are disabled (set   */

  /*       to analog input mode) including  UART I/O pins.           */

  GPIO_InitStructure.Pin = GPIO_PIN_All;

  GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;

  GPIO_InitStructure.Pull = GPIO_NOPULL;



  HAL_GPIO_Init(GPIOA, &GPIO_InitStructure); 

  HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);

  HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);

  HAL_GPIO_Init(GPIOD, &GPIO_InitStructure); 

  HAL_GPIO_Init(GPIOE, &GPIO_InitStructure);

  HAL_GPIO_Init(GPIOF, &GPIO_InitStructure); 

  HAL_GPIO_Init(GPIOG, &GPIO_InitStructure);    

  HAL_GPIO_Init(GPIOH, &GPIO_InitStructure);



  /* Disable GPIOs clock */

  __HAL_RCC_GPIOA_CLK_DISABLE();

  __HAL_RCC_GPIOB_CLK_DISABLE();

  __HAL_RCC_GPIOC_CLK_DISABLE();

  __HAL_RCC_GPIOD_CLK_DISABLE();

  __HAL_RCC_GPIOE_CLK_DISABLE();

  __HAL_RCC_GPIOF_CLK_DISABLE();  

  __HAL_RCC_GPIOG_CLK_DISABLE();  

  __HAL_RCC_GPIOH_CLK_DISABLE();



    /* Disable all used wakeup source */

    HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);

  

  /* Re-enable wakeup source */

  /* ## Setting the Wake up time ############################################*/

  /* RTC Wakeup Interrupt Generation: 

    the wake-up counter is set to its maximum value to yield the longest

    stop time to let the current reach its lowest operating point.

    The maximum value is 0xFFFF, corresponding to about 33 sec. when 

    RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16  */



  /* Wakeup Time Base = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSI))

     Wakeup Time = Wakeup Time Base * WakeUpCounter 

       = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSI)) * WakeUpCounter

       ==> WakeUpCounter = Wakeup Time / Wakeup Time Base   */



  /* To configure the wake up timer to 33s the WakeUpCounter is set to 0xFFFF:

     Wakeup Time Base = 16 /(~32 kHz RC) = ~0.5 ms

     Wakeup Time = 0.5 ms  * WakeUpCounter

     Therefore, with wake-up counter =  0xFFFF  = 65,535 

        Wakeup Time =  0.5 ms *  65,535 = ~ 33 sec. */

  HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, 0xFFFF, RTC_WAKEUPCLOCK_RTCCLK_DIV16);

  

  /*  Enable AXI MEMORY block shut-off in DStop2 modes */

  HAL_PWREx_EnableMemoryShutOff(PWR_RAM1_AXI_MEMORY_BLOCK);



  /* Clear STOP flag */

  __HAL_PWR_CLEAR_FLAG(PWR_CPU_FLAGS);



  /* Enter CD to DStop2 mode and SRD to DStop mode */

  if(__HAL_PWR_GET_FLAG(PWR_FLAG_STOP) == RESET)

  {

    /* Turn LED1 OFF  */

    BSP_LED_Off(LED1);

    /* Enter the system to STOP mode with main domain in DSTOP2 */

    HAL_PWREx_EnterSTOP2Mode(PWR_MAINREGULATOR_ON, PWR_STOPENTRY_WFI);

  }

    /* ... STOP2 mode ... */



  if (HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle) != HAL_OK)

  {

    Error_Handler();

  }

    /* Configure system clock after wake-up from STOP: enable HSE, PLL and select

    PLL as system clock source (HSE and PLL are disabled in STOP mode) */

    SYSCLKConfig_STOP();

        

    /* Check AXISRAM1 content */

    for (int count = 0; count < (CD_AXISRAM1_SIZE / CD_AXI_DATAWIDTH); count++)

    {

      if (*(uint64_t *)(CD_AXISRAM1_BASE + (count * CD_AXI_DATAWIDTH)) != Data64)

      {

        fail_number++;

      }

    }

    /* Check fail number */

    if (fail_number == 0U)

    {

      Error_Handler();

    }

    /* Re-configure and turn on LED1  */

    BSP_LED_Init(LED1 ); 

    BSP_LED_On(LED1 );   

  }

}