Exiting StopMode on Nucleo STM32H7

[JC Lebreton]

Posted on May 15, 2018 at 15:32

Hi, 

i'm having an issue using Stop mode on my nucelo board.

At the moment i program my StopMode to do this : 

- Wakeup on RTC counter

- Do not remove / change the states on the GPIO (I need this functionnality on my project)

My goal is to preheat a sensor before I read the value on it. It's a Co2 sensor from Telaire.

My issue is that i can't enter twice in StopMode nor enter StandBy mode after reading the value on the sensor.

I thinking my main issue is setting back the clocks correctly after the StopMode wakeup.

Here is my systeme clock generated by the Cube :

void SystemClock_Config(void)

{

RCC_OscInitTypeDef RCC_OscInitStruct;

RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;

/**Supply configuration update enable

*/ MODIFY_REG(PWR->CR3, PWR_CR3_SCUEN, 0);

/**Configure the main internal regulator output voltage

*/ __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

while ((PWR->D3CR & (PWR_D3CR_VOSRDY)) != PWR_D3CR_VOSRDY)

{ } /**Macro to configure the PLL clock source */ __HAL_RCC_PLL_PLLSOURCE_CONFIG(RCC_PLLSOURCE_HSI);

/**Initializes the CPU, AHB and APB busses clocks

*/ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_LSI; RCC_OscInitStruct.HSIState = RCC_HSI_DIV1; RCC_OscInitStruct.HSICalibrationValue = 16; RCC_OscInitStruct.LSIState = RCC_LSI_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; RCC_OscInitStruct.PLL.PLLM = 4; RCC_OscInitStruct.PLL.PLLN = 10; RCC_OscInitStruct.PLL.PLLP = 2; RCC_OscInitStruct.PLL.PLLQ = 32; RCC_OscInitStruct.PLL.PLLR = 2; RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3; RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOMEDIUM; RCC_OscInitStruct.PLL.PLLFRACN = 0; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }

/**Initializes the CPU, AHB and APB busses clocks

*/ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2 |RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1; RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV1; RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV1; RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV1;

if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)

{ _Error_Handler(__FILE__, __LINE__); }

PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC|RCC_PERIPHCLK_USART3

|RCC_PERIPHCLK_SDMMC|RCC_PERIPHCLK_I2C1; PeriphClkInitStruct.PLL2.PLL2M = 4; PeriphClkInitStruct.PLL2.PLL2N = 12; PeriphClkInitStruct.PLL2.PLL2P = 2; PeriphClkInitStruct.PLL2.PLL2Q = 2; PeriphClkInitStruct.PLL2.PLL2R = 8; PeriphClkInitStruct.PLL2.PLL2RGE = RCC_PLL2VCIRANGE_3; PeriphClkInitStruct.PLL2.PLL2VCOSEL = RCC_PLL2VCOWIDE; PeriphClkInitStruct.PLL2.PLL2FRACN = 0; PeriphClkInitStruct.SdmmcClockSelection = RCC_SDMMCCLKSOURCE_PLL2; PeriphClkInitStruct.Usart234578ClockSelection = RCC_USART234578CLKSOURCE_D2PCLK1; PeriphClkInitStruct.I2c123ClockSelection = RCC_I2C123CLKSOURCE_D2PCLK1; PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI; if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }

/**Configure the Systick interrupt time

*/ HAL_SYSTICK_Config(SystemCoreClock/1000);

/**Configure the Systick

*/ HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

/* SysTick_IRQn interrupt configuration */

HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);}

I try to use the 'SYSCLKConfig_STOP' function from the example without succes. And i even try to change some lines and still no results...

If someone can help me it will be awesome! Thanks for reading !JC