LPTIM

Modules
	LPTIM Private Macros
	LPTIM Exported Init structure
	LPTIM Exported Constants
	LPTIM Exported Macros
	LPTIM Exported Functions
	LPTIM Private Functions

Functions
void	LL_LPTIM_Disable (LPTIM_TypeDef *LPTIMx)
	Disable the LPTIM instance CR ENABLE LL_LPTIM_Disable. More...

Detailed Description

Function Documentation

LL_LPTIM_Disable()

void LL_LPTIM_Disable

(

LPTIM_TypeDef *

LPTIMx

)

Disable the LPTIM instance CR ENABLE LL_LPTIM_Disable.

Parameters

LPTIMx

Low-Power Timer instance

Note

The following sequence is required to solve LPTIM disable HW limitation. Please check Errata Sheet ES0335 for more details under "MCU may remain stuck in LPTIM interrupt when entering Stop mode" section.

Return values

None

Definition at line 199 of file stm32l4xx_ll_lptim.c.

{
  LL_RCC_ClocksTypeDef rcc_clock;
  uint32_t tmpclksource = 0;
  uint32_t tmpIER;
  uint32_t tmpCFGR;
  uint32_t tmpCMP;
  uint32_t tmpARR;
  uint32_t tmpOR;
#if defined(LPTIM_RCR_REP)
  uint32_t tmpRCR;
#endif

  /* Check the parameters */
  assert_param(IS_LPTIM_INSTANCE(LPTIMx));

  __disable_irq();

  /********** Save LPTIM Config *********/
  /* Save LPTIM source clock */
  switch ((uint32_t)LPTIMx)
  {
     case LPTIM1_BASE:
       tmpclksource = LL_RCC_GetLPTIMClockSource(LL_RCC_LPTIM1_CLKSOURCE);
       break;
#if defined(LPTIM2)
     case LPTIM2_BASE:
       tmpclksource = LL_RCC_GetLPTIMClockSource(LL_RCC_LPTIM2_CLKSOURCE);
       break;
#endif /* LPTIM2 */
     default:
       break;
  }

  /* Save LPTIM configuration registers */
  tmpIER = LPTIMx->IER;
  tmpCFGR = LPTIMx->CFGR;
  tmpCMP = LPTIMx->CMP;
  tmpARR = LPTIMx->ARR;
  tmpOR = LPTIMx->OR;
#if defined(LPTIM_RCR_REP)
  tmpRCR = LPTIMx->RCR;
#endif

  /************* Reset LPTIM ************/
  (void)LL_LPTIM_DeInit(LPTIMx);

  /********* Restore LPTIM Config *******/
  LL_RCC_GetSystemClocksFreq(&rcc_clock);

#if defined(LPTIM_RCR_REP)
  if ((tmpCMP != 0UL) || (tmpARR != 0UL) || (tmpRCR != 0UL))
#else
  if ((tmpCMP != 0UL) || (tmpARR != 0UL))
#endif
  {
    /* Force LPTIM source kernel clock from APB */
    switch ((uint32_t)LPTIMx)
    {
       case LPTIM1_BASE:
         LL_RCC_SetLPTIMClockSource(LL_RCC_LPTIM1_CLKSOURCE_PCLK1);
         break;
#if defined(LPTIM2)
       case LPTIM2_BASE:
         LL_RCC_SetLPTIMClockSource(LL_RCC_LPTIM2_CLKSOURCE_PCLK1);
         break;
#endif /* LPTIM2 */
       default:
         break;
    }

    if (tmpCMP != 0UL)
    {
      /* Restore CMP and ARR registers (LPTIM should be enabled first) */
      LPTIMx->CR |= LPTIM_CR_ENABLE;
      LPTIMx->CMP = tmpCMP;

      /* Polling on CMP write ok status after above restore operation */
      do
      {
        rcc_clock.SYSCLK_Frequency--; /* Used for timeout */
      } while (((LL_LPTIM_IsActiveFlag_CMPOK(LPTIMx) != 1UL)) && ((rcc_clock.SYSCLK_Frequency) > 0UL));

      LL_LPTIM_ClearFlag_CMPOK(LPTIMx);
    }

    if (tmpARR != 0UL)
    {
      LPTIMx->CR |= LPTIM_CR_ENABLE;
      LPTIMx->ARR = tmpARR;

      LL_RCC_GetSystemClocksFreq(&rcc_clock);
      /* Polling on ARR write ok status after above restore operation */
      do
      {
        rcc_clock.SYSCLK_Frequency--; /* Used for timeout */
      } while (((LL_LPTIM_IsActiveFlag_ARROK(LPTIMx) != 1UL)) && ((rcc_clock.SYSCLK_Frequency) > 0UL));

      LL_LPTIM_ClearFlag_ARROK(LPTIMx);
    }

#if defined(LPTIM_RCR_REP)
    if (tmpRCR != 0UL)
    {
      LPTIMx->CR |= LPTIM_CR_ENABLE;
      LPTIMx->RCR = tmpRCR;

      LL_RCC_GetSystemClocksFreq(&rcc_clock);
      /* Polling on RCR write ok status after above restore operation */
      do
      {
        rcc_clock.SYSCLK_Frequency--; /* Used for timeout */
      } while (((LL_LPTIM_IsActiveFlag_REPOK(LPTIMx) != 1UL)) && ((rcc_clock.SYSCLK_Frequency) > 0UL));

      LL_LPTIM_ClearFlag_REPOK(LPTIMx);
    }
#endif

    /* Restore LPTIM source kernel clock */
    LL_RCC_SetLPTIMClockSource(tmpclksource);
  }

  /* Restore configuration registers (LPTIM should be disabled first) */
  LPTIMx->CR &= ~(LPTIM_CR_ENABLE);
  LPTIMx->IER = tmpIER;
  LPTIMx->CFGR = tmpCFGR;
  LPTIMx->OR = tmpOR;

  __enable_irq();
}