Management functions. More...

Functions
HAL_StatusTypeDef	HAL_COMP_Lock (COMP_HandleTypeDef *hcomp)
	Lock the selected comparator configuration. More...

uint32_t	HAL_COMP_GetOutputLevel (COMP_HandleTypeDef *hcomp)
	Return the output level (high or low) of the selected comparator. The output level depends on the selected polarity. If the polarity is not inverted: More...

void	HAL_COMP_TriggerCallback (COMP_HandleTypeDef *hcomp)
	Comparator trigger callback. More...

Detailed Description

Management functions.

 ===============================================================================
                      ##### Peripheral Control functions #####
 ===============================================================================
    [..]
    This subsection provides a set of functions allowing to control the comparators.

Function Documentation

◆ HAL_COMP_GetOutputLevel()

uint32_t HAL_COMP_GetOutputLevel ( COMP_HandleTypeDef * hcomp )

Return the output level (high or low) of the selected comparator. The output level depends on the selected polarity. If the polarity is not inverted:

Comparator output is low when the input plus is at a lower voltage than the input minus
Comparator output is high when the input plus is at a higher voltage than the input minus If the polarity is inverted:
Comparator output is high when the input plus is at a lower voltage than the input minus
Comparator output is low when the input plus is at a higher voltage than the input minus
Parameters

hcomp COMP handle
Return values
Returns the selected comparator output level:

COMP_OUTPUT_LEVEL_LOW

COMP_OUTPUT_LEVEL_HIGH

Definition at line 956 of file stm32l4xx_hal_comp.c.

 {
   /* Check the parameter */
   assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance));
 
   return (uint32_t)(READ_BIT(hcomp->Instance->CSR, COMP_CSR_VALUE)
                     >> COMP_OUTPUT_LEVEL_BITOFFSET_POS);
 }

◆ HAL_COMP_Lock()

HAL_StatusTypeDef HAL_COMP_Lock ( COMP_HandleTypeDef * hcomp )

Lock the selected comparator configuration.

Note: A system reset is required to unlock the comparator configuration.; Locking the comparator from reset state is possible if __HAL_RCC_SYSCFG_CLK_ENABLE() is being called before.

Parameters

hcomp COMP handle

Return values

HAL status

Definition at line 895 of file stm32l4xx_hal_comp.c.

 {
   HAL_StatusTypeDef status = HAL_OK;
 
   /* Check the COMP handle allocation and lock status */
   if(hcomp == NULL)
   {
     status = HAL_ERROR;
   }
   else if(__HAL_COMP_IS_LOCKED(hcomp))
   {
     status = HAL_ERROR;
   }
   else
   {
     /* Check the parameter */
     assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance));
 
     /* Set HAL COMP handle state */
     switch(hcomp->State)
     {
       case HAL_COMP_STATE_RESET:
         hcomp->State = HAL_COMP_STATE_RESET_LOCKED;
         break;
       case HAL_COMP_STATE_READY:
         hcomp->State = HAL_COMP_STATE_READY_LOCKED;
         break;
       default: /* HAL_COMP_STATE_BUSY */
         hcomp->State = HAL_COMP_STATE_BUSY_LOCKED;
         break;
     }
   }
 
   if(status == HAL_OK)
   {
     /* Set the lock bit corresponding to selected comparator */
     __HAL_COMP_LOCK(hcomp);
   }
 
   return status;
 }

◆ HAL_COMP_TriggerCallback()

__weak void HAL_COMP_TriggerCallback ( COMP_HandleTypeDef * hcomp )

Comparator trigger callback.