/**
* @brief Configure all GPIO's to AN to reduce the power consumption
* @param None
* @retval None
*/
static void GPIO_ConfigAN(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* Configure all GPIO as analog to reduce current consumption on non used IOs */
/* Enable GPIOs clock */
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOC_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
__GPIOE_CLK_ENABLE();
__GPIOF_CLK_ENABLE();
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Pin = GPIO_PIN_All;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/* Disable GPIOs clock */
__GPIOA_CLK_DISABLE();
__GPIOB_CLK_DISABLE();
__GPIOC_CLK_DISABLE();
__GPIOD_CLK_DISABLE();
__GPIOE_CLK_DISABLE();
__GPIOF_CLK_DISABLE();
}
/**
* @brief CEC MSP De-Initialization
* This function disable the Peripheral's clock
* @param hcec: CEC handle pointer
* @retval None
*/
void HAL_CEC_MspDeInit(CEC_HandleTypeDef *hcec)
{
/* Disable CEC clock */
__CEC_CLK_DISABLE();
/* Disable GPIO TX/RX clock */
__GPIOB_CLK_DISABLE();
}
/**
* @brief System Power Configuration
* The system Power is configured as follow :
* + Regulator in LP mode
* + VREFINT OFF, with fast wakeup enabled
* + HSI as SysClk after Wake Up
* + No IWDG
* + Automatic Wakeup using RTC clocked by LSI (after ~4s)
* @param None
* @retval None
*/
static void SystemPower_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable Ultra low power mode */
HAL_PWREx_EnableUltraLowPower();
/* Enable the fast wake up from Ultra low power mode */
HAL_PWREx_EnableFastWakeUp();
/* Select HSI as system clock source after Wake Up from Stop mode */
__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_StopWakeUpClock_HSI);
/* Enable GPIOs clock */
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOC_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
__GPIOH_CLK_ENABLE();
/* Configure all GPIO port pins in Analog Input mode (floating input trigger OFF) */
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(GPIOH, &GPIO_InitStructure);
/* Disable GPIOs clock */
__GPIOA_CLK_DISABLE();
__GPIOB_CLK_DISABLE();
__GPIOC_CLK_DISABLE();
__GPIOD_CLK_DISABLE();
__GPIOH_CLK_DISABLE();
/* Configure RTC */
RTCHandle.Instance = RTC;
/* 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();
}
}
/**
* @brief This function configures the system to enter Sleep mode for
* current consumption measurement purpose.
* Sleep Mode
* ==========
* - System Running at PLL (168MHz)
* - Flash 5 wait state
* - Instruction and Data caches ON
* - Prefetch ON
* - Code running from Internal FLASH
* - All peripherals disabled.
* - Wakeup using EXTI Line (Key Button)
* @param None
* @retval None
*/
void SleepMode_Measure(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* Configure all GPIO as analog to reduce current consumption on non used IOs */
/* Enable GPIOs clock */
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOC_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
__GPIOE_CLK_ENABLE();
__GPIOH_CLK_ENABLE();
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Pin = GPIO_PIN_All;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Disable GPIOs clock */
__GPIOA_CLK_DISABLE();
__GPIOB_CLK_DISABLE();
__GPIOC_CLK_DISABLE();
__GPIOD_CLK_DISABLE();
__GPIOE_CLK_DISABLE();
__GPIOH_CLK_DISABLE();
/* Configure Key Button */
BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_EXTI);
/* Suspend Tick increment to prevent wakeup by Systick interrupt.
Otherwise the Systick interrupt will wake up the device within 1ms (HAL time base) */
HAL_SuspendTick();
/* Request to enter SLEEP mode */
HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
/* Resume Tick interrupt if disabled prior to sleep mode entry */
HAL_ResumeTick();
/* Initialize LED6 */
BSP_LED_Init(LED6);
/* Turn LED6 On */
BSP_LED_On(LED6);
/* Inserted Delay */
HAL_Delay(200);
}
/**
* @brief This function configures the system to enter Sleep mode for
* current consumption measurement purpose.
* Sleep Mode
* ==========
* - System Running at PLL (72 MHz)
* - Flash 2 wait state
* - Prefetch ON
* - Code running from Internal FLASH
* - All peripherals disabled.
* - Wakeup using EXTI Line (User push-button PA.00 pin)
* @param None
* @retval None
*/
void SleepMode_Measure(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* Configure all GPIO as analog to reduce current consumption on non used IOs */
/* Enable GPIOs clock */
/* Warning : Reconfiguring all GPIO will close the connexion with the debugger */
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOC_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
__GPIOE_CLK_ENABLE();
__GPIOF_CLK_ENABLE();
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Pin = GPIO_PIN_All;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/* Disable GPIOs clock */
__GPIOA_CLK_DISABLE();
__GPIOB_CLK_DISABLE();
__GPIOC_CLK_DISABLE();
__GPIOD_CLK_DISABLE();
__GPIOE_CLK_DISABLE();
__GPIOF_CLK_DISABLE();
/* Configure User push-button as external interrupt generator */
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
/*Suspend Tick increment to prevent wakeup by Systick interrupt.
Otherwise the Systick interrupt will wake up the device within 1ms (HAL time base)*/
HAL_SuspendTick();
/* Request to enter SLEEP mode */
HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
/* Resume Tick interrupt if disabled prior to sleep mode entry*/
HAL_ResumeTick();
/* Initialize led */
BSP_LED_Init(LED3);
}
/**
* @brief System Power Configuration
* The system Power is configured as follow :
* + Regulator in LP mode
* + VREFINT OFF, with fast wakeup enabled
* + HSI as SysClk after Wake Up
* + No IWDG
* + Wakeup using EXTI Line (Key Button PC.13)
* @param None
* @retval None
*/
static void SystemPower_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable Ultra low power mode */
HAL_PWREx_EnableUltraLowPower();
/* Enable the fast wake up from Ultra low power mode */
HAL_PWREx_EnableFastWakeUp();
/* Select HSI as system clock source after Wake Up from Stop mode */
__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_StopWakeUpClock_HSI);
/* Enable GPIOs clock */
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOC_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
__GPIOH_CLK_ENABLE();
/* Configure all GPIO port pins in Analog Input mode (floating input trigger OFF) */
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(GPIOH, &GPIO_InitStructure);
/* Disable GPIOs clock */
__GPIOA_CLK_DISABLE();
__GPIOB_CLK_DISABLE();
__GPIOC_CLK_DISABLE();
__GPIOD_CLK_DISABLE();
__GPIOH_CLK_DISABLE();
}
/**
* @brief Configure the system for power optimization
*
* @note This API configures the system to be ready for low power mode
* - Unused GPIO in Analog mode
* - Fast Wakeup
* - Verefint disabled in low power mode
* - FLASH in low power mode
*
* @param None
* @retval None
*/
void SystemPower_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/**
* Disable FLASH in SLEEP Mode
*/
__HAL_FLASH_SLEEP_POWERDOWN_ENABLE();
//SO: TO BE VERIFIED FOR L4
/* Enable Power Clock */
__HAL_RCC_PWR_CLK_ENABLE();
/**
* Enable Ultra low power and Fast wakeup as vrefint is not used in that project
*/
//SO: TO BE VERIFIED FOR L4 (these APIs are not available for L4)
//HAL_PWREx_EnableUltraLowPower();
//HAL_PWREx_EnableFastWakeUp();
/*
* Select HSI as system clock source after Wake Up from Stop mode
*/
//__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_StopWakeUpClock_MSI); //SO: TO BE VERIFIED FOR L4 (why not this?)
__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_StopWakeUpClock_HSI);
/*
* Disable all GPIOs clock in SLEEP mode
*/
#if (JTAG_SUPPORTED == 0)
__GPIOA_CLK_SLEEP_DISABLE();
#endif
__GPIOB_CLK_SLEEP_DISABLE();
__GPIOC_CLK_SLEEP_DISABLE();
__GPIOD_CLK_SLEEP_DISABLE();
__GPIOE_CLK_SLEEP_DISABLE(); //SO: TO BE VERIFIED FOR L4
__GPIOF_CLK_SLEEP_DISABLE(); //SO: TO BE VERIFIED FOR L4
__GPIOG_CLK_SLEEP_DISABLE(); //SO: TO BE VERIFIED FOR L4
__GPIOH_CLK_SLEEP_DISABLE();
/*
* Enable GPIOs clock
*/
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOC_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
__GPIOE_CLK_ENABLE(); //SO: TO BE VERIFIED FOR L4
__GPIOF_CLK_ENABLE(); //SO: TO BE VERIFIED FOR L4
__GPIOG_CLK_ENABLE(); //SO: TO BE VERIFIED FOR L4
__GPIOH_CLK_ENABLE();
/*
* Configure all GPIO port pins in Analog mode with no pull
*/
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
GPIO_InitStructure.Speed = GPIO_SPEED_HIGH; //SO: TO BE VERIFIED FOR L4
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Pin = GPIO_PIN_All;
HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOE, &GPIO_InitStructure); //SO: TO BE VERIFIED FOR L4
HAL_GPIO_Init(GPIOF, &GPIO_InitStructure); //SO: TO BE VERIFIED FOR L4
HAL_GPIO_Init(GPIOG, &GPIO_InitStructure); //SO: TO BE VERIFIED FOR L4
HAL_GPIO_Init(GPIOH, &GPIO_InitStructure);
#if (JTAG_SUPPORTED == 1)
GPIO_InitStructure.Pin = (GPIO_PIN_All ^ (GPIO_PIN_13 | GPIO_PIN_14));
#endif
HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
/*
* Disable GPIOs clock
*/
__GPIOA_CLK_DISABLE();
__GPIOB_CLK_DISABLE();
__GPIOC_CLK_DISABLE();
__GPIOD_CLK_DISABLE();
__GPIOE_CLK_DISABLE(); //SO: TO BE VERIFIED FOR L4
__GPIOF_CLK_DISABLE(); //SO: TO BE VERIFIED FOR L4
__GPIOG_CLK_DISABLE(); //SO: TO BE VERIFIED FOR L4
__GPIOH_CLK_DISABLE();
return;
}
/**
* @brief System Power Configuration
* The system Power is configured as follow :
* + Regulator in LP mode
* + VREFINT OFF, with fast wakeup enabled
* + HSI as SysClk after Wake Up
* + No IWDG
* + Wakeup using EXTI Line (Key Button PC.13)
* @param None
* @retval None
*/
static void SystemPower_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable Ultra low power mode */
HAL_PWREx_EnableUltraLowPower();
/* Enable the fast wake up from Ultra low power mode */
HAL_PWREx_EnableFastWakeUp();
/* Select HSI as system clock source after Wake Up from Stop mode */
__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_StopWakeUpClock_HSI);
/* Enable GPIOs clock */
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOC_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
__GPIOH_CLK_ENABLE();
/* Configure GPIO Pins: PA0,PA1,PA2,PA3,PA4,PA5,PA8,PA9,PA11,PA12,PA13,\
PA14,PA15 in Analog Input mode (floating input trigger OFF) */
/* PA6: SDO, PA7: SDI, PA10 :SDn are not put in analog mode */
GPIO_InitStructure.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | \
GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_11 | \
GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
GPIO_InitStructure.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure GPIO Pins: PB0,PB1,PB2,PB4,PB5,PB7,PB8,PB9,PB10,PB11,PB12,PB13,\
PB14,PB15 in Analog Input mode (floating input trigger OFF) */
/*PB6: CSn, PB3: SCLK are not put in analog mode */
GPIO_InitStructure.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_4 | \
GPIO_PIN_5 | GPIO_PIN_7 | GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | \
GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
GPIO_InitStructure.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
/* Configure GPIO Pins: PC0,PC1,PC2,PC3,PC4,PC5,PC6,PC8,PC9,PC10,PC11,PC12,\
PC13,PC14,PC15 in Analog Input mode (floating input trigger OFF) */
/*PC7: GPIO3, PC13: Push Button are not put in analog mode */
GPIO_InitStructure.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | \
GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_8 | GPIO_PIN_9 | \
GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_14 | GPIO_PIN_15;
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
GPIO_InitStructure.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
/* Configure all GPIO port pins in Analog Input mode (floating input trigger OFF) */
GPIO_InitStructure.Pin = GPIO_PIN_All;
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
GPIO_InitStructure.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOH, &GPIO_InitStructure);
/* Disable GPIOs clock */
__GPIOA_CLK_DISABLE();
__GPIOB_CLK_DISABLE();
__GPIOC_CLK_DISABLE();
__GPIOD_CLK_DISABLE();
__GPIOH_CLK_DISABLE();
}
void GPIO_Clock_Put(GPIO_ClockProviderTypeDef* clk, GPIO_TypeDef* gpiox, uint32_t Pin)
{
int index;
uint16_t prev, curr;
if (gpiox == GPIOA)
{
index = 0;
}
else if (gpiox == GPIOB)
{
index = 1;
}
else if (gpiox == GPIOC)
{
index = 2;
}
else if (gpiox == GPIOD)
{
index = 3;
}
else if (gpiox == GPIOE)
{
index = 4;
}
else if (gpiox == GPIOF)
{
index = 5;
}
else if (gpiox == GPIOG)
{
index = 6;
}
else if (gpiox == GPIOH)
{
index = 7;
}
else
{
return;
}
prev = clk->bits[index];
curr = (clk->bits[index] &= ~Pin);
if (prev != 0 && curr == 0)
{
switch (index)
{
case 0:
__GPIOA_CLK_DISABLE();
break;
case 1:
__GPIOB_CLK_DISABLE();
break;
case 2:
__GPIOC_CLK_DISABLE();
break;
case 3:
__GPIOD_CLK_DISABLE();
break;
case 4:
__GPIOE_CLK_DISABLE();
break;
case 5:
__GPIOF_CLK_DISABLE();
break;
case 6:
__GPIOG_CLK_DISABLE();
break;
case 7:
__GPIOH_CLK_DISABLE();
break;
default:
break;
}
}
}
/**
* @brief This function configures the system to enter Stop mode with RTC
* clocked by LSE or LSI for current consumption measurement purpose.
* STOP Mode with RTC clocked by LSE/LSI
* =====================================
* - RTC Clocked by LSE or LSI
* - Regulator in LP mode
* - HSI, HSE OFF and LSI OFF if not used as RTC Clock source
* - No IWDG
* - Automatic Wakeup using RTC clocked by LSE/LSI (~20s)
* @param None
* @retval None
*/
void StopRTCMode_Measure(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* Configure all GPIO as analog to reduce current consumption on non used IOs */
/* Enable GPIOs clock */
/* Warning : Reconfiguring all GPIO will close the connexion with the debugger */
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOC_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
__GPIOE_CLK_ENABLE();
__GPIOF_CLK_ENABLE();
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Pin = GPIO_PIN_All;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/* Disable GPIOs clock */
__GPIOA_CLK_DISABLE();
__GPIOB_CLK_DISABLE();
__GPIOC_CLK_DISABLE();
__GPIOD_CLK_DISABLE();
__GPIOE_CLK_DISABLE();
__GPIOF_CLK_DISABLE();
RTCHandle.Instance = RTC;
/* Configure RTC prescaler and RTC data registers as follows:
- 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();
}
/*## Configure the Wake up timer ###########################################*/
/* RTC Wakeup Interrupt Generation:
Wakeup Time Base = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSE or LSI))
Wakeup Time = Wakeup Time Base * WakeUpCounter
= (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSE or LSI)) * WakeUpCounter
==> WakeUpCounter = Wakeup Time / Wakeup Time Base
To configure the wake up timer to 20s the WakeUpCounter is set to 0xA017:
RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16
Wakeup Time Base = 16 /(~32.768KHz) = ~0,488 ms
Wakeup Time = ~20s = 0,488ms * WakeUpCounter
==> WakeUpCounter = ~20s/0,488ms = 40983 = 0xA017 */
/* Disable Wake-up timer */
HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, 0xA017, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
/* Configure User push-button as external interrupt generator */
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
/* Enter Stop Mode */
HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
/* Configures 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();
/* Disable Wake-up timer */
HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
}
