Solved
STM32H743 RTC Wakeup
Im trying to configure RTC for periodic autowakeup, and have no clue why it is now working properly. RTC_WKUP_IRQHandler called immediately and again and again, even though wakeup flag is cleared, resulting 2.4 MHz at LED2 (LED2_GPIO_Port->ODR ^= LED2_Pin;)
void RTC_Init(void)
{
RTCHandle.Instance = RTC;
RTCHandle.Init.HourFormat = RTC_HOURFORMAT_24;
RTCHandle.Init.AsynchPrediv = 127;
RTCHandle.Init.SynchPrediv = 255;
RTCHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
RTCHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
RTCHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
RTCHandle.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE;
HAL_RTC_Init(&RTCHandle);
HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, 1, RTC_WAKEUPCLOCK_CK_SPRE_16BITS);
}
void RTC_WKUP_IRQHandler(void)
{
LED2_GPIO_Port->ODR ^= LED2_Pin;
if (__HAL_RTC_WAKEUPTIMER_GET_FLAG(&RTCHandle, RTC_FLAG_WUTF) != 0U)
{
__HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(&RTCHandle, RTC_FLAG_WUTF);
}
}
void SystemPeripheryInit(void)
{
HAL_Init();
SystemClock_Config();
SCB_InvalidateICache();
SCB_EnableICache();
SCB_InvalidateDCache();
SCB_DisableDCache(); // for correct DMA operation
MX_GPIO_Init();
RTC_Init();
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);
while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY))
{
}
__HAL_RCC_PLL_PLLSOURCE_CONFIG(RCC_PLLSOURCE_HSE);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 1;
RCC_OscInitStruct.PLL.PLLN = 80;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
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_DIV2;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
{
Error_Handler();
}
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USART3|RCC_PERIPHCLK_USART2
|RCC_PERIPHCLK_UART4|RCC_PERIPHCLK_UART7
|RCC_PERIPHCLK_FDCAN|RCC_PERIPHCLK_USART1
|RCC_PERIPHCLK_UART8|RCC_PERIPHCLK_UART5
|RCC_PERIPHCLK_SPI4|RCC_PERIPHCLK_ADC
|RCC_PERIPHCLK_I2C1|RCC_PERIPHCLK_USB;
PeriphClkInitStruct.PLL2.PLL2M = 1;
PeriphClkInitStruct.PLL2.PLL2N = 80;
PeriphClkInitStruct.PLL2.PLL2P = 2;
PeriphClkInitStruct.PLL2.PLL2Q = 12;
PeriphClkInitStruct.PLL2.PLL2R = 2;
PeriphClkInitStruct.PLL2.PLL2RGE = RCC_PLL2VCIRANGE_3;
PeriphClkInitStruct.PLL2.PLL2VCOSEL = RCC_PLL2VCOWIDE;
PeriphClkInitStruct.PLL2.PLL2FRACN = 0;
PeriphClkInitStruct.PLL3.PLL3M = 1;
PeriphClkInitStruct.PLL3.PLL3N = 80;
PeriphClkInitStruct.PLL3.PLL3P = 2;
PeriphClkInitStruct.PLL3.PLL3Q = 20;
PeriphClkInitStruct.PLL3.PLL3R = 2;
PeriphClkInitStruct.PLL3.PLL3RGE = RCC_PLL3VCIRANGE_3;
PeriphClkInitStruct.PLL3.PLL3VCOSEL = RCC_PLL3VCOWIDE;
PeriphClkInitStruct.PLL3.PLL3FRACN = 0;
PeriphClkInitStruct.Spi45ClockSelection = RCC_SPI45CLKSOURCE_D2PCLK1;
PeriphClkInitStruct.FdcanClockSelection = RCC_FDCANCLKSOURCE_PLL2;
PeriphClkInitStruct.Usart234578ClockSelection = RCC_USART234578CLKSOURCE_D2PCLK1;
PeriphClkInitStruct.Usart16ClockSelection = RCC_USART16CLKSOURCE_D2PCLK2;
PeriphClkInitStruct.I2c123ClockSelection = RCC_I2C123CLKSOURCE_D2PCLK1;
PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_PLL3;
PeriphClkInitStruct.AdcClockSelection = RCC_ADCCLKSOURCE_PLL2;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
Error_Handler();
}
HAL_PWREx_EnableUSBVoltageDetector();
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI;
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
HAL_RCC_EnableCSS();
}
