예제 #1
0
/**
  * @brief  Initialize some features of COMP instance.
  * @note   This function configures features of the selected COMP instance.
  *         Some features are also available at scope COMP common instance
  *         (common to several COMP instances).
  *         Refer to functions having argument "COMPxy_COMMON" as parameter.
  * @param  COMPx COMP instance
  * @param  COMP_InitStruct Pointer to a @ref LL_COMP_InitTypeDef structure
  * @retval An ErrorStatus enumeration value:
  *          - SUCCESS: COMP registers are initialized
  *          - ERROR: COMP registers are not initialized
  */
ErrorStatus LL_COMP_Init(COMP_TypeDef *COMPx, LL_COMP_InitTypeDef *COMP_InitStruct)
{
  ErrorStatus status = SUCCESS;
  
  /* Check the parameters */
  assert_param(IS_COMP_ALL_INSTANCE(COMPx));
  assert_param(IS_LL_COMP_POWER_MODE(COMP_InitStruct->PowerMode));
  assert_param(IS_LL_COMP_INPUT_MINUS(COMPx, COMP_InitStruct->InputMinus));
  assert_param(IS_LL_COMP_INPUT_PLUS(COMPx, COMP_InitStruct->InputPlus));
  assert_param(IS_LL_COMP_INPUT_HYSTERESIS(COMP_InitStruct->InputHysteresis));
  assert_param(IS_LL_COMP_OUTPUT_POLARITY(COMP_InitStruct->OutputPolarity));
  assert_param(IS_LL_COMP_OUTPUT_BLANKING_SOURCE(COMP_InitStruct->OutputBlankingSource));
  
  /* Note: Hardware constraint (refer to description of this function)        */
  /*       COMP instance must not be locked.                                  */
  if(LL_COMP_IsLocked(COMPx) == 0)
  {
    /* Configuration of comparator instance :                                 */
    /*  - PowerMode                                                           */
    /*  - InputPlus                                                           */
    /*  - InputMinus                                                          */
    /*  - InputHysteresis                                                     */
    /*  - OutputPolarity                                                      */
    /*  - OutputBlankingSource                                                */
    MODIFY_REG(COMPx->CSR,
                 COMP_CSR_PWRMODE
               | COMP_CSR_INPSEL
               | COMP_CSR_SCALEN
               | COMP_CSR_BRGEN
               | COMP_CSR_INMSEL
               | COMP_CSR_HYST
               | COMP_CSR_POLARITY
               | COMP_CSR_BLANKING
              ,
                 COMP_InitStruct->PowerMode
               | COMP_InitStruct->InputPlus
               | COMP_InitStruct->InputMinus
               | COMP_InitStruct->InputHysteresis
               | COMP_InitStruct->OutputPolarity
               | COMP_InitStruct->OutputBlankingSource
              );

  }
  else
  {
    /* Initialization error: COMP instance is locked.                         */
    status = ERROR;
  }
  return status;
}
/**
  * @brief  Initialize some features of COMP instance.
  * @note   This function configures features of the selected COMP instance.
  *         Some features are also available at scope COMP common instance
  *         (common to several COMP instances).
  *         Refer to functions having argument "COMPxy_COMMON" as parameter.
  * @param  COMPx COMP instance
  * @param  COMP_InitStruct Pointer to a @ref LL_COMP_InitTypeDef structure
  * @retval An ErrorStatus enumeration value:
  *          - SUCCESS: COMP registers are initialized
  *          - ERROR: COMP registers are not initialized
  */
ErrorStatus LL_COMP_Init(COMP_TypeDef *COMPx, LL_COMP_InitTypeDef *COMP_InitStruct)
{
  ErrorStatus status = SUCCESS;
  
  /* Check the parameters */
  assert_param(IS_COMP_ALL_INSTANCE(COMPx));
  assert_param(IS_LL_COMP_POWER_MODE(COMP_InitStruct->PowerMode));
  assert_param(IS_LL_COMP_INPUT_PLUS(COMPx, COMP_InitStruct->InputPlus));
  assert_param(IS_LL_COMP_INPUT_MINUS(COMPx, COMP_InitStruct->InputMinus));
  assert_param(IS_LL_COMP_INPUT_HYSTERESIS(COMP_InitStruct->InputHysteresis));
  assert_param(IS_LL_COMP_OUTPUT_SELECTION(COMP_InitStruct->OutputSelection));
  assert_param(IS_LL_COMP_OUTPUT_POLARITY(COMP_InitStruct->OutputPolarity));
  
  /* Note: Hardware constraint (refer to description of this function)        */
  /*       COMP instance must not be locked.                                  */
  if(LL_COMP_IsLocked(COMPx) == 0U)
  {
    /* Configuration of comparator instance :                                 */
    /*  - PowerMode                                                           */
    /*  - InputPlus                                                           */
    /*  - InputMinus                                                          */
    /*  - InputHysteresis                                                     */
    /*  - OutputSelection                                                     */
    /*  - OutputPolarity                                                      */
    /* Note: Connection switch is applicable only to COMP instance COMP1,     */
    /*       therefore is COMP2 is selected the equivalent bit is             */
    /*       kept unmodified.                                                 */
    if(COMPx == COMP1)
    {
      MODIFY_REG(COMP->CSR,
                 (  COMP_CSR_COMP1MODE
                  | COMP_CSR_COMP1INSEL
                  | COMP_CSR_COMP1SW1
                  | COMP_CSR_COMP1OUTSEL
                  | COMP_CSR_COMP1HYST
                  | COMP_CSR_COMP1POL
                 ) << __COMP_BITOFFSET_INSTANCE(COMPx)
                ,
                 (  COMP_InitStruct->PowerMode
                  | COMP_InitStruct->InputPlus
                  | COMP_InitStruct->InputMinus
                  | COMP_InitStruct->InputHysteresis
                  | COMP_InitStruct->OutputSelection
                  | COMP_InitStruct->OutputPolarity
                 ) << __COMP_BITOFFSET_INSTANCE(COMPx)
                );
    }
    else
    {
      MODIFY_REG(COMP->CSR,
                 (  COMP_CSR_COMP1MODE
                  | COMP_CSR_COMP1INSEL
                  | COMP_CSR_COMP1OUTSEL
                  | COMP_CSR_COMP1HYST
                  | COMP_CSR_COMP1POL
                 ) << __COMP_BITOFFSET_INSTANCE(COMPx)
                ,
                 (  COMP_InitStruct->PowerMode
                  | COMP_InitStruct->InputPlus
                  | COMP_InitStruct->InputMinus
                  | COMP_InitStruct->InputHysteresis
                  | COMP_InitStruct->OutputSelection
                  | COMP_InitStruct->OutputPolarity
                 ) << __COMP_BITOFFSET_INSTANCE(COMPx)
                );
    }
    
  }
  else
  {
    /* Initialization error: COMP instance is locked.                         */
    status = ERROR;
  }
  
  return status;
}