void HAL_Core_Enter_Stop_Mode(uint16_t wakeUpPin, uint16_t edgeTriggerMode, long seconds)
{
if (seconds > 0) {
HAL_RTC_Cancel_UnixAlarm();
HAL_RTC_Set_UnixAlarm((time_t) seconds);
}
if ((wakeUpPin < TOTAL_PINS) && (edgeTriggerMode <= FALLING))
{
uint16_t BKP_DR9_Data = wakeUpPin;//set wakeup pin mumber
BKP_DR9_Data |= (edgeTriggerMode << 8);//set edge trigger mode
BKP_DR9_Data |= (0xA << 12);//set stop mode flag
/*************************************************/
//BKP_DR9_Data: 0xAXXX
// ||||
// ||----- octet wakeUpPin number
// |------ nibble edgeTriggerMode
// ------- nibble stop mode flag
/*************************************************/
/* Execute Stop mode on next system reset */
BKP_WriteBackupRegister(BKP_DR9, BKP_DR9_Data);
/* Reset System */
NVIC_SystemReset();
}
}
void HAL_Core_Enter_Standby_Mode(uint32_t seconds, void* reserved)
{
// Configure RTC wake-up
if (seconds > 0) {
HAL_RTC_Cancel_UnixAlarm();
HAL_RTC_Set_UnixAlarm((time_t) seconds);
}
/* Execute Standby mode on next system reset */
BKP_WriteBackupRegister(BKP_DR9, 0xA5A5);
/* Reset System */
NVIC_SystemReset();
}
int HAL_Core_Enter_Standby_Mode(uint32_t seconds, uint32_t flags)
{
// Configure RTC wake-up
if (seconds > 0) {
HAL_RTC_Cancel_UnixAlarm();
HAL_RTC_Set_UnixAlarm((time_t) seconds);
}
/* Execute Standby mode on next system reset */
BKP_WriteBackupRegister(BKP_DR9, 0xA5A5);
/* Reset System */
NVIC_SystemReset();
// This will never get reached
return 0;
}
void HAL_Core_Execute_Stop_Mode(void)
{
int32_t state = HAL_disable_irq();
if((BKP_ReadBackupRegister(BKP_DR9) >> 12) == 0xA)
{
uint16_t wakeUpPin = BKP_ReadBackupRegister(BKP_DR9) & 0xFF;
InterruptMode edgeTriggerMode = (InterruptMode)((BKP_ReadBackupRegister(BKP_DR9) >> 8) & 0x0F);
/* Clear Stop mode system flag */
BKP_WriteBackupRegister(BKP_DR9, 0xFFFF);
if ((wakeUpPin < TOTAL_PINS) && (edgeTriggerMode <= FALLING))
{
PinMode wakeUpPinMode = INPUT;
/* Set required pinMode based on edgeTriggerMode */
switch(edgeTriggerMode)
{
case CHANGE:
wakeUpPinMode = INPUT;
break;
case RISING:
wakeUpPinMode = INPUT_PULLDOWN;
break;
case FALLING:
wakeUpPinMode = INPUT_PULLUP;
break;
}
HAL_Pin_Mode(wakeUpPin, wakeUpPinMode);
/* Configure EXTI Interrupt : wake-up from stop mode using pin interrupt */
HAL_Interrupts_Attach(wakeUpPin, NULL, NULL, edgeTriggerMode, NULL);
/* Request to enter STOP mode with regulator in low power mode */
PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
/* Detach the Interrupt pin */
HAL_Interrupts_Detach(wakeUpPin);
/* Disable RTC Alarm */
HAL_RTC_Cancel_UnixAlarm();
/* At this stage the system has resumed from STOP mode */
/* Enable HSE, PLL and select PLL as system clock source after wake-up from STOP */
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready */
if(RCC_WaitForHSEStartUp() != SUCCESS)
{
/* If HSE startup fails try to recover by system reset */
NVIC_SystemReset();
}
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08);
}
}
HAL_enable_irq(state);
}
