Src/main.c (PWR_STANDBY)

Outline

Includes

#include "main.h"

Private define

#define LED_TOGGLE_DELAY

Private variables

RTCHandle

RTC_TimeStructure

RTC_DateStructure

RTC_AlarmStructure

TimingDelay

AuthorizeToggle

MfxExtiReceived

Private function prototypes

main()

SystemClock_Config()

RTC_Config()

Error_Handler()

HAL_SYSTICK_Callback()

HAL_GPIO_EXTI_Callback(uint16_t)

Files

SourceVuSTM32 Libraries and SamplesPWR_STANDBYSrc/main.c

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/** ****************************************************************************** * @file PWR/PWR_STANDBY/Src/main.c * @author MCD Application Team * @brief This sample code shows how to use STM32F4xx PWR HAL API to enter * and exit the Standby mode. ****************************************************************************** * @attention * * Copyright (c) 2017 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "main.h" /** @addtogroup STM32F4xx_HAL_Examples * @{ */ /** @addtogroup PWR_STANDBY * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define LED_TOGGLE_DELAY 100 /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* RTC handler declaration */ RTC_HandleTypeDef RTCHandle; RTC_TimeTypeDef RTC_TimeStructure; RTC_DateTypeDef RTC_DateStructure; RTC_AlarmTypeDef RTC_AlarmStructure; static __IO uint32_t TimingDelay = 0; static __IO uint32_t AuthorizeToggle = 0; static __IO uint32_t MfxExtiReceived = 0; /* Private function prototypes -----------------------------------------------*/ static void SystemClock_Config(void); static void RTC_Config(void); /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None */ int main(void) { /* STM32F4xx HAL library initialization: - Configure the Flash prefetch, instruction and Data caches - Configure the Systick to generate an interrupt each 1 msec - Set NVIC Group Priority to 4 - Global MSP (MCU Support Package) initialization */ HAL_Init(); /* Configure the system clock to 180 MHz */ SystemClock_Config(); /* Configure LED1 and LED3 */ BSP_LED_Init(LED1); BSP_LED_Init(LED3); /* Configure Key Button */ BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_EXTI); /* Configure Joystick using MFX in IT mode in order to wakeup system after standby */ BSP_JOY_Init(JOY_MODE_EXTI); /* RTC configuration */ RTC_Config(); /* Turn on LED1 */ BSP_LED_On(LED1); /* Enable WKUP pin */ HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1); /* Infinite loop */ while (1) { if (AuthorizeToggle) { /* Toggle LED1 */ BSP_LED_Toggle(LED1); AuthorizeToggle = 0; } if (MfxExtiReceived) { /* Clear MFX IT */ BSP_IO_ITClear(); MfxExtiReceived = 0; } } } /** * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 180000000 * HCLK(Hz) = 180000000 * AHB Prescaler = 1 * APB1 Prescaler = 4 * APB2 Prescaler = 2 * HSE Frequency(Hz) = 8000000 * PLL_M = 8 * PLL_N = 360 * PLL_P = 2 * PLL_Q = 7 * PLL_R = 2 * VDD(V) = 3.3 * Main regulator output voltage = Scale1 mode * Flash Latency(WS) = 5 * @param None * @retval None */ static void SystemClock_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; HAL_StatusTypeDef ret = HAL_OK; /* Enable Power Control clock */ __HAL_RCC_PWR_CLK_ENABLE(); /* The voltage scaling allows optimizing the power consumption when the device is clocked below the maximum system frequency, to update the voltage scaling value regarding system frequency refer to product datasheet. */ __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); /* Enable HSE Oscillator and activate PLL with HSE as source */ 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 = 8; RCC_OscInitStruct.PLL.PLLN = 360; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 7; RCC_OscInitStruct.PLL.PLLR = 2; ret = HAL_RCC_OscConfig(&RCC_OscInitStruct); if(ret != HAL_OK) { while(1) { ; } } /* Activate the OverDrive to reach the 180 MHz Frequency */ ret = HAL_PWREx_EnableOverDrive(); if(ret != HAL_OK) { while(1) { ; } } /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */ RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5); if(ret != HAL_OK) { while(1) { ; } } } /** * @brief Configures the RTC. * @param None * @retval None */ static void RTC_Config(void) { RTCHandle.Instance = RTC; /* Set the RTC time base to 1s */ /* Configure RTC prescaler and RTC data registers as follow: - Hour Format = Format 24 - Asynch Prediv = Value according to source clock - Synch Prediv = Value according to source clock - OutPut = Output Disable - OutPutPolarity = High Polarity - OutPutType = Open Drain */ RTCHandle.Init.HourFormat = RTC_HOURFORMAT_24; RTCHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV; RTCHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV; RTCHandle.Init.OutPut = RTC_OUTPUT_DISABLE; RTCHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; RTCHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; if(HAL_RTC_Init(&RTCHandle) != HAL_OK) { /* Initialization Error */ Error_Handler(); } /* Check and Clear the Wakeup flag */ if(__HAL_PWR_GET_FLAG(PWR_FLAG_WU) != RESET) { __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); } /* Check if the system was resumed from StandBy mode */ if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET) { /* Clear StandBy flag */ __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB); /* Disable the write protection for RTC registers */ __HAL_RTC_WRITEPROTECTION_DISABLE(&RTCHandle); /* Wait for RTC APB registers synchronisation (needed after start-up from Reset)*/ if(HAL_RTC_WaitForSynchro(&RTCHandle) != HAL_OK) { /* Initialization Error */ Error_Handler(); } /* Enable the write protection for RTC registers */ __HAL_RTC_WRITEPROTECTION_ENABLE(&RTCHandle); /* No need to configure the RTC as the RTC config(clock source, enable, prescaler,...) are kept after wake-up from STANDBY */ } else { /* Set the time to 01h 00mn 00s AM */ RTC_TimeStructure.TimeFormat = RTC_HOURFORMAT12_AM; RTC_TimeStructure.Hours = 0x01; RTC_TimeStructure.Minutes = 0x00; RTC_TimeStructure.Seconds = 0x00; if(HAL_RTC_SetTime(&RTCHandle, &RTC_TimeStructure, RTC_FORMAT_BCD) == HAL_ERROR) { /* Initialization Error */ Error_Handler(); } } } /** * @brief This function is executed in case of error occurrence. * @param None * @retval None */ void Error_Handler(void) { /* Turn LED3 on */ BSP_LED_On(LED3); while(1) { } } /** * @brief SYSTICK callback * @param None * @retval None */ void HAL_SYSTICK_Callback(void) { HAL_IncTick(); if (TimingDelay != 0) { TimingDelay--; } else { TimingDelay = LED_TOGGLE_DELAY; AuthorizeToggle = 1; } } /** * @brief EXTI line detection callbacks * @param GPIO_Pin: Specifies the pins connected EXTI line * @retval None */ void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) { if(GPIO_Pin == TAMPER_BUTTON_PIN) { HAL_RTC_GetTime(&RTCHandle, &RTC_TimeStructure, RTC_FORMAT_BIN); HAL_RTC_GetDate(&RTCHandle, &RTC_DateStructure, RTC_FORMAT_BIN); /* Set the alarm to current time + 5s */ RTC_AlarmStructure.Alarm = RTC_ALARM_A; RTC_AlarmStructure.AlarmTime.TimeFormat = RTC_TimeStructure.TimeFormat; RTC_AlarmStructure.AlarmTime.Hours = RTC_TimeStructure.Hours; RTC_AlarmStructure.AlarmTime.Minutes = RTC_TimeStructure.Minutes; RTC_AlarmStructure.AlarmTime.Seconds = (RTC_TimeStructure.Seconds + 0x05) % 60; RTC_AlarmStructure.AlarmDateWeekDay = 0x31; RTC_AlarmStructure.AlarmDateWeekDaySel = RTC_ALARMDATEWEEKDAYSEL_DATE; RTC_AlarmStructure.AlarmMask = RTC_ALARMMASK_DATEWEEKDAY | RTC_ALARMMASK_HOURS | RTC_ALARMMASK_MINUTES; RTC_AlarmStructure.AlarmSubSecondMask = RTC_ALARMSUBSECONDMASK_NONE; /* The Following Wakeup sequence is highly recommended prior to each Standby mode entry mainly when using more than one wakeup source this is to not miss any wakeup event: - Disable all used wakeup sources, - Clear all related wakeup flags, - Re-enable all used wakeup sources, - Enter the Standby mode. */ /*## Disable all used wakeup sources #####################################*/ /* Disable Wake-up timer */ HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1); /* Disable RTC Alarm */ HAL_RTC_DeactivateAlarm(&RTCHandle, RTC_ALARM_A); /*## Clear all related wakeup flags ######################################*/ /* Clear PWR wake up Flag */ __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); /* Clear the Alarm Flag */ __HAL_RTC_ALARM_CLEAR_FLAG(&RTCHandle, RTC_FLAG_ALRAF); /*## Re-enable all used wakeup sources ###################################*/ /* Set RTC alarm */ if(HAL_RTC_SetAlarm_IT(&RTCHandle, &RTC_AlarmStructure, RTC_FORMAT_BIN) != HAL_OK) { /* Initialization Error */ Error_Handler(); } /* Enable WKUP pin */ HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1); /* Turn LED1 off */ BSP_LED_Off(LED1); /*## Enter Standby Mode ##################################################*/ HAL_PWR_EnterSTANDBYMode(); } if(GPIO_Pin == MFX_IRQOUT_PIN) { /* The different functionalities of MFX (TS, Joystick, SD detection, etc. ) can be configured in exti mode to generate an IRQ on given events. The MFX IRQ_OUT pin is unique and common to all functionalities, so if several functionalities are configured in exit mode, the MCU has to enquire MFX about the IRQ source (see BSP_IO_ITGetStatus). Communication with Mfx is done by I2C. Often the sw requires ISRs (irq service routines) to be quick while communication with I2C can be considered relatively long (hundreds of usec depending on I2C clk). Considering that the features for human interaction like TS, Joystick, SD detection don�t need immediate reaction, it is suggested to use POLLING instead of EXTI mode, in order to avoid "blocking I2C communication" on interrupt service routines */ /* Here an example of implementation is proposed: mix between pooling and exit: On ISR a flag is set (MfxIrqReceived), the main loop polls on the flag; Mcu communicates with Mfx only when the flag has been set. This is just an example: the users should choose they strategy depending on their application needs.*/ MfxExtiReceived = 1; } } #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) { /* User can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ /* Infinite loop */ while (1) { } } #endif /** * @} */ /** * @} */

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