Example #1
0
/**-----------------------------------------------------------------------------
 * @brief	Entree en mode Stop.
 */
void STOP_MODE() {

	EXTI_InitTypeDef EXTI_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;

	// Config IT
	SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);	// Connect EXTI Line0 to PA0 pin

	// Configure EXTI Line0
	EXTI_InitStructure.EXTI_Line = EXTI_Line0;
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitStructure);

	// Enable and set EXTI Line0 Interrupt to the lowest priority
	NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);

	// Config Mode Stop
	PWR_WakeUpPinCmd(ENABLE);
	PWR_BackupRegulatorCmd(DISABLE);
	PWR_FlashPowerDownCmd(ENABLE);

	/* Enable PWR and BKP clock */
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);

	// Entree Mode Stop
	PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
}
Example #2
0
/**
  * @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
  *           - FLASH in deep power down mode
  *           - Automatic Wakeup using RTC clocked by LSE/LSI (~20s)
  * @param  None
  * @retval None
  */
void StopMode_Measure(void)
{
  __IO uint32_t index = 0;
  GPIO_InitTypeDef GPIO_InitStructure;
  NVIC_InitTypeDef  NVIC_InitStructure;
  EXTI_InitTypeDef  EXTI_InitStructure;
  
  /* Allow access to RTC */
  PWR_BackupAccessCmd(ENABLE);

#if defined (RTC_CLOCK_SOURCE_LSI)  /* LSI used as RTC source clock*/
/* The RTC Clock may varies due to LSI frequency dispersion. */   
  /* Enable the LSI OSC */ 
  RCC_LSICmd(ENABLE);

  /* Wait till LSI is ready */  
  while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
  {
  }

  /* Select the RTC Clock Source */
  RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);

#elif defined (RTC_CLOCK_SOURCE_LSE) /* LSE used as RTC source clock */
  /* Enable the LSE OSC */
  RCC_LSEConfig(RCC_LSE_ON);

  /* Wait till LSE is ready */  
  while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
  {
  }

  /* Select the RTC Clock Source */
  RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
  
#else
  #error Please select the RTC Clock source inside the main.c file
#endif /* RTC_CLOCK_SOURCE_LSI */


  /* Enable the RTC Clock */
  RCC_RTCCLKCmd(ENABLE);

  /* Wait for RTC APB registers synchronisation */
  RTC_WaitForSynchro();

  /* Configure all GPIO as analog to reduce current consumption on non used IOs */
  /* Enable GPIOs clock */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOC |
                         RCC_AHB1Periph_GPIOD | RCC_AHB1Periph_GPIOE | RCC_AHB1Periph_GPIOF |
                         RCC_AHB1Periph_GPIOG | RCC_AHB1Periph_GPIOH | RCC_AHB1Periph_GPIOI, ENABLE);

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  GPIO_Init(GPIOD, &GPIO_InitStructure);
  GPIO_Init(GPIOE, &GPIO_InitStructure);
  GPIO_Init(GPIOF, &GPIO_InitStructure);
  GPIO_Init(GPIOG, &GPIO_InitStructure);
  GPIO_Init(GPIOH, &GPIO_InitStructure);
  GPIO_Init(GPIOI, &GPIO_InitStructure);
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /* Disable GPIOs clock */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOC |
                         RCC_AHB1Periph_GPIOD | RCC_AHB1Periph_GPIOE | RCC_AHB1Periph_GPIOF |
                         RCC_AHB1Periph_GPIOG | RCC_AHB1Periph_GPIOH | RCC_AHB1Periph_GPIOI, DISABLE);
 
  /* EXTI configuration *******************************************************/
  EXTI_ClearITPendingBit(EXTI_Line22);
  EXTI_InitStructure.EXTI_Line = EXTI_Line22;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);
  
  /* Enable the RTC Wakeup Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = RTC_WKUP_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
  /* RTC Wakeup Interrupt Generation: Clock Source: RTCCLK_Div16, Wakeup Time Base: ~20s
     RTC Clock Source LSE 32.768KHz or LSI ~32KHz  

     Wakeup Time Base = (16 / (LSE or LSI)) * WakeUpCounter
  */
  RTC_WakeUpClockConfig(RTC_WakeUpClock_RTCCLK_Div16);
  RTC_SetWakeUpCounter(0xA000-1);

  /* Enable the Wakeup Interrupt */
  RTC_ITConfig(RTC_IT_WUT, ENABLE);

  /* Enable Wakeup Counter */
  RTC_WakeUpCmd(ENABLE);

  /* FLASH Deep Power Down Mode enabled */
  PWR_FlashPowerDownCmd(ENABLE);

  /* Enter Stop Mode */
  PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);

  /* Initialize LED1 on EVAL board */
  STM_EVAL_LEDInit(LED1);

  /* Infinite loop */
  while (1)
  {
    /* Toggle The LED1 */
    STM_EVAL_LEDToggle(LED1);

    /* Inserted Delay */
    for(index = 0; index < 0x5FF; index++);
  }
}