/**
  * @brief  Initializes the COMP peripheral according to the specified parameters
  *         in COMP_InitStruct
  * @note   If the selected comparator is locked, initialization can't be performed.
  *         To unlock the configuration, perform a system reset.
  * @note   By default, PA1 is selected as COMP1 non inverting input.
  *         To use PA4 as COMP1 non inverting input call COMP_SwitchCmd() after COMP_Init()
  * @param  COMP_Selection: the selected comparator. 
  *          This parameter can be one of the following values:
  *            @arg COMP_Selection_COMP1: COMP1 selected
  *            @arg COMP_Selection_COMP2: COMP2 selected
  * @param  COMP_InitStruct: pointer to an COMP_InitTypeDef structure that contains 
  *         the configuration information for the specified COMP peripheral.
  * @retval None
  */
void COMP_Init(uint32_t COMP_Selection, COMP_InitTypeDef* COMP_InitStruct)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_COMP_ALL_PERIPH(COMP_Selection));
  assert_param(IS_COMP_INVERTING_INPUT(COMP_InitStruct->COMP_InvertingInput));
  assert_param(IS_COMP_OUTPUT(COMP_InitStruct->COMP_Output));
  assert_param(IS_COMP_OUTPUT_POL(COMP_InitStruct->COMP_OutputPol));
  assert_param(IS_COMP_HYSTERESIS(COMP_InitStruct->COMP_Hysteresis));
  assert_param(IS_COMP_MODE(COMP_InitStruct->COMP_Mode));

  /*!< Get the COMP_CSR register value */
  tmpreg = COMP->CSR;

  /*!< Clear the COMP1SW1, COMPx_IN_SEL, COMPx_OUT_TIM_SEL, COMPx_POL, COMPx_HYST and COMPx_PWR_MODE bits */ 
  tmpreg &= (uint32_t) ~(COMP_CSR_CLEAR_MASK<<COMP_Selection);

  /*!< Configure COMP: inverting input, output redirection, hysteresis value and power mode */
  /*!< Set COMPxINSEL bits according to COMP_InitStruct->COMP_InvertingInput value */
  /*!< Set COMPxOUTSEL bits according to COMP_InitStruct->COMP_Output value */
  /*!< Set COMPxPOL bit according to COMP_InitStruct->COMP_OutputPol value */
  /*!< Set COMPxHYST bits according to COMP_InitStruct->COMP_Hysteresis value */
  /*!< Set COMPxMODE bits according to COMP_InitStruct->COMP_Mode value */   
  tmpreg |= (uint32_t)((COMP_InitStruct->COMP_InvertingInput | COMP_InitStruct->COMP_Output |
                       COMP_InitStruct->COMP_OutputPol | COMP_InitStruct->COMP_Hysteresis |
                       COMP_InitStruct->COMP_Mode)<<COMP_Selection);

  /*!< Write to COMP_CSR register */
  COMP->CSR = tmpreg;  
}
Example #2
0
/**
  * @brief  Initializes the COMP peripheral according to the specified parameters
  *         in COMP_InitStruct
  * @note   If the selected comparator is locked, initialization can't be performed.
  *         To unlock the configuration, perform a system reset.
  * @note   By default, PA1 is selected as COMP1 non inverting input.
  *         To use PA4 as COMP1 non inverting input call COMP_SwitchCmd() after COMP_Init()
  * @param  COMP_Selection: the selected comparator. 
  *          This parameter can be COMP_Selection_COMPx where x can be 1 to 7
  *          to select the COMP peripheral.
  * @param  COMP_InitStruct: pointer to an COMP_InitTypeDef structure that contains 
  *         the configuration information for the specified COMP peripheral.
  *           - COMP_InvertingInput specifies the inverting input of COMP
  *           - COMP_NonInvertingInput specifies the non inverting input of COMP
  *           - COMP_Output connect COMP output to selected timer
  *             input (Input capture / Output Compare Reference Clear / Break Input)
  *           - COMP_BlankingSrce specifies the blanking source of COMP
  *           - COMP_OutputPol select output polarity
  *           - COMP_Hysteresis configures COMP hysteresis value
  *           - COMP_Mode configures COMP power mode
  * @note    COMP_Hysteresis must be configured only for STM32F303xC. Otherwise, COMP_Hysteresis
  *          must be kept at reset value(COMP_Hysteresis_No).
  * @note    COMP_Mode field is only applicable for STM32F303xC devices.
  * @retval None
  */
void COMP_Init(uint32_t COMP_Selection, COMP_InitTypeDef* COMP_InitStruct)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_COMP_ALL_PERIPH(COMP_Selection));
  assert_param(IS_COMP_INVERTING_INPUT(COMP_InitStruct->COMP_InvertingInput));
  assert_param(IS_COMP_NONINVERTING_INPUT(COMP_InitStruct->COMP_NonInvertingInput));
  assert_param(IS_COMP_OUTPUT(COMP_InitStruct->COMP_Output));
  assert_param(IS_COMP_BLANKING_SOURCE(COMP_InitStruct->COMP_BlankingSrce));
  assert_param(IS_COMP_OUTPUT_POL(COMP_InitStruct->COMP_OutputPol));
  assert_param(IS_COMP_HYSTERESIS(COMP_InitStruct->COMP_Hysteresis));
  assert_param(IS_COMP_MODE(COMP_InitStruct->COMP_Mode));

  /*!< Get the COMPx_CSR register value */
  tmpreg = *(__IO uint32_t *) (COMP_BASE + COMP_Selection);

  /*!< Clear the COMP1SW1, COMPxINSEL, COMPxOUTSEL, COMPxPOL, COMPxHYST and COMPxMODE bits */
  tmpreg &= (uint32_t) (COMP_CSR_CLEAR_MASK);

  /*!< Configure COMP: inverting input, output redirection, hysteresis value and power mode */
  /*!< Set COMPxINSEL bits according to COMP_InitStruct->COMP_InvertingInput value */
  /*!< Set COMPxNONINSEL bits according to COMP_InitStruct->COMP_NonInvertingInput value */
  /*!< Set COMPxBLANKING bits according to COMP_InitStruct->COMP_BlankingSrce value */
  /*!< Set COMPxOUTSEL bits according to COMP_InitStruct->COMP_Output value */
  /*!< Set COMPxPOL bit according to COMP_InitStruct->COMP_OutputPol value */
  /*!< Set COMPxHYST bits according to COMP_InitStruct->COMP_Hysteresis value */
  /*!< Set COMPxMODE bits according to COMP_InitStruct->COMP_Mode value */
  tmpreg |= (uint32_t)(COMP_InitStruct->COMP_InvertingInput | COMP_InitStruct->COMP_NonInvertingInput |
                        COMP_InitStruct->COMP_Output | COMP_InitStruct->COMP_OutputPol | COMP_InitStruct->COMP_BlankingSrce |
                        COMP_InitStruct->COMP_Hysteresis | COMP_InitStruct->COMP_Mode);

  /*!< Write to COMPx_CSR register */
  *(__IO uint32_t *) (COMP_BASE + COMP_Selection) = tmpreg;
}
Example #3
0
/**
  * @brief  Initialize the COMP peripheral according to the specified
  *         parameters in the COMP_InitTypeDef and initialize the associated handle.
  * @note   If the selected comparator is locked, initialization cannot be performed.
  *         To unlock the configuration, perform a system reset.
  * @param  hcomp  COMP handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the COMP handle allocation and lock status */
  if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET))
  {
    status = HAL_ERROR;
  }
  else
  {
    /* Check the parameters */
    assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance));
    assert_param(IS_COMP_INVERTINGINPUT(hcomp->Init.InvertingInput));
    assert_param(IS_COMP_NONINVERTINGINPUT(hcomp->Init.NonInvertingInput));
    assert_param(IS_COMP_NONINVERTINGINPUT_INSTANCE(hcomp->Instance, hcomp->Init.NonInvertingInput));
    assert_param(IS_COMP_OUTPUT(hcomp->Init.Output));
    assert_param(IS_COMP_OUTPUT_INSTANCE(hcomp->Instance, hcomp->Init.Output));
    assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol));
    assert_param(IS_COMP_HYSTERESIS(hcomp->Init.Hysteresis));
    assert_param(IS_COMP_MODE(hcomp->Init.Mode));
    assert_param(IS_COMP_BLANKINGSRCE(hcomp->Init.BlankingSrce)); 
    assert_param(IS_COMP_BLANKINGSRCE_INSTANCE(hcomp->Instance, hcomp->Init.BlankingSrce)); 
    assert_param(IS_COMP_TRIGGERMODE(hcomp->Init.TriggerMode));

    if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLE)
    {
      assert_param(IS_COMP_WINDOWMODE_INSTANCE(hcomp->Instance));
      assert_param(IS_COMP_WINDOWMODE(hcomp->Init.WindowMode));
    }

    /* Init SYSCFG and the low level hardware to access comparators */
    __HAL_RCC_SYSCFG_CLK_ENABLE();
    /* Init the low level hardware : SYSCFG to access comparators */
    HAL_COMP_MspInit(hcomp);
    
    if(hcomp->State == HAL_COMP_STATE_RESET)
    {
      /* Allocate lock resource and initialize it */
      hcomp->Lock = HAL_UNLOCKED;
    }

    /* Set COMP parameters */
    /*     Set COMPxINSEL bits according to hcomp->Init.InvertingInput value        */
    /*     Set COMPxNONINSEL bits according to hcomp->Init.NonInvertingInput value  */
    /*     Set COMPxBLANKING bits according to hcomp->Init.BlankingSrce value       */
    /*     Set COMPxOUTSEL bits according to hcomp->Init.Output value               */
    /*     Set COMPxPOL bit according to hcomp->Init.OutputPol value                */
    /*     Set COMPxHYST bits according to hcomp->Init.Hysteresis value             */
    /*     Set COMPxMODE bits according to hcomp->Init.Mode value                   */
    COMP_INIT(hcomp);

    /* Initialize the COMP state*/
    hcomp->State = HAL_COMP_STATE_READY;
  }
  
  return status;
}
Example #4
0
/**
  * @brief  Initialize the COMP according to the specified
  *         parameters in the COMP_InitTypeDef and initialize the associated handle.
  * @note   If the selected comparator is locked, initialization can't be performed.
  *         To unlock the configuration, perform a system reset.
  * @param  hcomp  COMP handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp)
{
  uint32_t          tmpcsr = 0;
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the COMP handle allocation and lock status */
  if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET))
  {
    status = HAL_ERROR;
  }
  else
  {
    /* Check the parameters */
    assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance));
    assert_param(IS_COMP_INVERTINGINPUT(hcomp->Init.InvertingInput));
    assert_param(IS_COMP_NONINVERTINGINPUT(hcomp->Init.NonInvertingInput));
    assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol));
    assert_param(IS_COMP_MODE(hcomp->Init.Mode));
    assert_param(IS_COMP_HYSTERESIS(hcomp->Init.Hysteresis));
    assert_param(IS_COMP_BLANKINGSRCE(hcomp->Init.BlankingSrce)); 
    assert_param(IS_COMP_BLANKINGSRCE_INSTANCE(hcomp->Instance, hcomp->Init.BlankingSrce)); 
    assert_param(IS_COMP_TRIGGERMODE(hcomp->Init.TriggerMode));

    if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLE)
    {
      assert_param(IS_COMP_WINDOWMODE_INSTANCE(hcomp->Instance));
      assert_param(IS_COMP_WINDOWMODE(hcomp->Init.WindowMode));
    }

    /* Init SYSCFG and the low level hardware to access comparators */
    __HAL_RCC_SYSCFG_CLK_ENABLE();
    /* Init the low level hardware : SYSCFG to access comparators */
    HAL_COMP_MspInit(hcomp);
    
    if(hcomp->State == HAL_COMP_STATE_RESET)
    {
      /* Allocate lock resource and initialize it */
      hcomp->Lock = HAL_UNLOCKED;
    }

    /* Change COMP peripheral state */
    hcomp->State = HAL_COMP_STATE_BUSY;

    /* Set COMP parameters */
    /*     Set INMSEL bits according to hcomp->Init.InvertingInput value       */
    /*     Set INPSEL bits according to hcomp->Init.NonInvertingInput value    */
    /*     Set BLANKING bits according to hcomp->Init.BlankingSrce value       */
    /*     Set HYST bits according to hcomp->Init.Hysteresis value             */
    /*     Set POLARITY bit according to hcomp->Init.OutputPol value           */
    /*     Set POWERMODE bits according to hcomp->Init.Mode value              */
    /*     Set WINMODE bit according to hcomp->Init.WindowMode value           */
    tmpcsr = hcomp->Init.InvertingInput    |  \
             hcomp->Init.NonInvertingInput |  \
             hcomp->Init.BlankingSrce      |  \
             hcomp->Init.Hysteresis        |  \
             hcomp->Init.OutputPol         |  \
             hcomp->Init.Mode              |  \
             hcomp->Init.WindowMode;
    
    /* Check VREFINT use for NonInvertingInput */
    if(hcomp->Init.InvertingInput == COMP_INVERTINGINPUT_VREFINT)
    {
      /* Enable voltage scaler to output VREFINT */
      tmpcsr |= COMP_CSR_SCALEN;
    }
    else
    {
      if((hcomp->Init.InvertingInput == COMP_INVERTINGINPUT_1_4VREFINT) ||
         (hcomp->Init.InvertingInput == COMP_INVERTINGINPUT_1_2VREFINT) ||
         (hcomp->Init.InvertingInput == COMP_INVERTINGINPUT_3_4VREFINT))
      {
        /* Enable voltage & bandgap scaler to output VREFINT */
        tmpcsr |= (COMP_CSR_BRGEN | COMP_CSR_SCALEN);
      }
    }
    
    MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_UPDATE_PARAMETERS_MASK, tmpcsr);

    /* Initialize the COMP state*/
    hcomp->State = HAL_COMP_STATE_READY;
  }
  
  return status;
}
/**
  * @brief  Initializes the COMP according to the specified
  *         parameters in the COMP_InitTypeDef and create the associated handle.
  * @note   If the selected comparator is locked, initialization can't be performed.
  *         To unlock the configuration, perform a system reset.
  * @note   When the LPTIM connection is enabled, the following pins LPTIM_IN1(PB5, PC0)
            and LPTIM_IN2(PB7, PC2) should not be configured in AF. 
  * @param  hcomp: COMP handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp)
{
 HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the COMP handle allocation and lock status */
  if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != 0x00))
  {
    status = HAL_ERROR;
  }
  else
  {
    /* Check the parameter */
    assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance));
    assert_param(IS_COMP_INVERTINGINPUT(hcomp->Init.InvertingInput));
    assert_param(IS_COMP_NONINVERTINGINPUT(hcomp->Init.NonInvertingInput));
    assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol));
    assert_param(IS_COMP_MODE(hcomp->Init.Mode));
    
    if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLE)
    {
      assert_param(IS_COMP_WINDOWMODE_INSTANCE(hcomp->Instance));
      assert_param(IS_COMP_WINDOWMODE(hcomp->Init.WindowMode));
    }
    
    if(hcomp->State == HAL_COMP_STATE_RESET)
    {
      /* Allocate lock resource and initialize it */
      hcomp->Lock = HAL_UNLOCKED;
      /* Init SYSCFG and the low level hardware to access comparators */
     __HAL_RCC_SYSCFG_CLK_ENABLE();
      /* Init the low level hardware : SYSCFG to access comparators */
      HAL_COMP_MspInit(hcomp);
    }
    
    /* Change COMP peripheral state */
    hcomp->State = HAL_COMP_STATE_BUSY;
  
    /* Set COMP parameters                                                              */
    /*     Set COMPxINSEL bits according to hcomp->Init.InvertingInput value            */
    /*     Set COMPxNONINSEL bits according to hcomp->Init.NonInvertingInput value      */
    /*     Set COMPxLPTIMCONNECTION bits according to hcomp->Init.LPTIMConnection value */
    /*     Set COMPxPOL bit according to hcomp->Init.OutputPol value                    */
    /*     Set COMPxMODE bits according to hcomp->Init.Mode value                       */
    /*     Set COMP1WM bit according to hcomp->Init.WindowMode value                    */

    /* No LPTIM connexion requested */
    if (hcomp->Init.LPTIMConnection == COMP_LPTIMCONNECTION_DISABLED)
    {
         MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_UPDATE_PARAMETERS_MASK, \
                                       hcomp->Init.InvertingInput    |  \
                                       hcomp->Init.NonInvertingInput |  \
                                       hcomp->Init.OutputPol         |  \
                                       hcomp->Init.Mode              |  \
                                       hcomp->Init.WindowMode);
    }
    else
    {
      /* LPTIM connexion requested on COMP2*/
      if ((hcomp->Instance) == COMP2)
      {
        /* Check the MCU_ID in order to allow or not the COMP2 connection to LPTIM-input2 */
        if (((HAL_GetDEVID() == C_DEV_ID_L073) && (HAL_GetREVID() == C_REV_ID_A))
                          ||
            ((HAL_GetDEVID() == C_DEV_ID_L053) && (HAL_GetREVID() == C_REV_ID_A))
                          ||
            ((HAL_GetDEVID() == C_DEV_ID_L053) && (HAL_GetREVID() == C_REV_ID_Z)))
        {
          /* Note : COMP2 can be connected only to input 1 of LPTIM if requested */
          assert_param(IS_COMP2_LPTIMCONNECTION_RESTRICTED(hcomp->Init.LPTIMConnection));
          MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_UPDATE_PARAMETERS_MASK, \
                                       hcomp->Init.InvertingInput    |  \
                                       hcomp->Init.NonInvertingInput |  \
                                       COMP_CSR_COMP2LPTIM1IN1       |  \
                                       hcomp->Init.OutputPol         |  \
                                       hcomp->Init.Mode              |  \
                                       hcomp->Init.WindowMode);
        }
        else
        {
           /* Note : COMP2 can be connected to input 1 or input2  of LPTIM if requested */
          assert_param(IS_COMP2_LPTIMCONNECTION(hcomp->Init.LPTIMConnection));
          switch (hcomp->Init.LPTIMConnection)
          {
          case  COMP_LPTIMCONNECTION_IN1_ENABLED :
              MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_UPDATE_PARAMETERS_MASK, \
                                         hcomp->Init.InvertingInput    |  \
                                         hcomp->Init.NonInvertingInput |  \
                                         COMP_CSR_COMP2LPTIM1IN1       |  \
                                         hcomp->Init.OutputPol         |  \
                                         hcomp->Init.Mode              |  \
                                         hcomp->Init.WindowMode);
              break;
          case  COMP_LPTIMCONNECTION_IN2_ENABLED :
              MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_UPDATE_PARAMETERS_MASK, \
                                         hcomp->Init.InvertingInput    |  \
                                         hcomp->Init.NonInvertingInput |  \
                                         COMP_CSR_COMP2LPTIM1IN2       |  \
                                         hcomp->Init.OutputPol         |  \
                                         hcomp->Init.Mode              |  \
                                         hcomp->Init.WindowMode);
              break;
          default :
              MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_UPDATE_PARAMETERS_MASK, \
                                         hcomp->Init.InvertingInput    |  \
                                         hcomp->Init.NonInvertingInput |  \
                                         hcomp->Init.OutputPol         |  \
                                         hcomp->Init.Mode              |  \
                                         hcomp->Init.WindowMode);
              break;
          }
        }
      }
      else
      /* LPTIM connexion requested on COMP1 */
      {
        /* Note : COMP1 can be connected to the input 1 of LPTIM if requested */
        assert_param(IS_COMP1_LPTIMCONNECTION(hcomp->Init.LPTIMConnection));
        if (hcomp->Init.LPTIMConnection == COMP_LPTIMCONNECTION_IN1_ENABLED)
            MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_UPDATE_PARAMETERS_MASK, \
                                         hcomp->Init.InvertingInput    |      \
                                         hcomp->Init.NonInvertingInput |      \
                                         COMP_CSR_COMP1LPTIM1IN1       |      \
                                         hcomp->Init.OutputPol         |      \
                                         hcomp->Init.Mode              |      \
                                         hcomp->Init.WindowMode);
        else
            MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_UPDATE_PARAMETERS_MASK, \
                                         hcomp->Init.InvertingInput    |      \
                                         hcomp->Init.NonInvertingInput |      \
                                         hcomp->Init.OutputPol         |      \
                                         hcomp->Init.Mode              |      \
                                         hcomp->Init.WindowMode);
      }
    }
    /* Initialize the COMP state*/
    hcomp->State = HAL_COMP_STATE_READY;

  }
  
  return status;
}
/**
  * @brief  Initializes the COMP according to the specified
  *         parameters in the COMP_InitTypeDef and create the associated handle.
  * @note   If the selected comparator is locked, initialization can't be performed.
  *         To unlock the configuration, perform a system reset.
  * @param  hcomp: COMP handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp)
{ 
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the COMP handle allocation and lock status */
  if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET))
  {
    status = HAL_ERROR;
  }
  else
  {
    /* Check the parameter */
    assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance));

    if (hcomp->Instance == COMP1)
    {
      assert_param(IS_COMP_NONINVERTINGINPUTPULL(hcomp->Init.NonInvertingInputPull));
    }
    else /* if (hcomp->Instance == COMP2) */
    {
      assert_param(IS_COMP_INVERTINGINPUT(hcomp->Init.InvertingInput));
      assert_param(IS_COMP_OUTPUT(hcomp->Init.Output));
      assert_param(IS_COMP_MODE(hcomp->Init.Mode));
      assert_param(IS_COMP_WINDOWMODE(hcomp->Init.WindowMode));
    }
  
    /* In window mode, non-inverting inputs of the 2 comparators are          */
    /* connected together and are using inputs of COMP2 only. If COMP1 is     */
    /* selected, this parameter is discarded.                                 */
    if ((hcomp->Init.WindowMode == COMP_WINDOWMODE_DISABLE) ||
        (hcomp->Instance == COMP2)                            )
    {
      assert_param(IS_COMP_NONINVERTINGINPUT(hcomp->Init.NonInvertingInput));
    }
    
      
    /* Enable SYSCFG clock and the low level hardware to access comparators */
    if(hcomp->State == HAL_COMP_STATE_RESET)
    {
      /* Allocate lock resource and initialize it */
      hcomp->Lock = HAL_UNLOCKED;

      /* Enable SYSCFG clock to control the routing Interface (RI) */
      __HAL_RCC_SYSCFG_CLK_ENABLE();
      
      /* Init the low level hardware */
      HAL_COMP_MspInit(hcomp);
    }
  
    /* Configuration of comparator:                                           */
    /*  - Output selection                                                    */
    /*  - Inverting input selection                                           */
    /*  - Window mode                                                         */
    /*  - Mode fast/slow speed                                                */
    /*  - Inverting input pull-up/down resistors                              */
    
    /* Configuration depending on comparator instance */
    if (hcomp->Instance == COMP1)
    {
      MODIFY_REG(COMP->CSR, COMP_CSR_400KPD | COMP_CSR_10KPD | COMP_CSR_400KPU | COMP_CSR_10KPU,
                            hcomp->Init.NonInvertingInputPull                                   );
    }
    else /* if (hcomp->Instance == COMP2) */
    {
      /* Note: If comparator 2 is not enabled, inverting input (parameter     */
      /*       "hcomp->Init.InvertingInput") is configured into function      */
      /*       "HAL_COMP_Start()" since inverting  input selection also       */
      /*       enables the comparator 2.                                      */
      /*       If comparator 2 is already enabled, inverting input is         */
      /*       reconfigured on the fly.                                       */
      if (__COMP_IS_ENABLED(hcomp) == RESET)
      {
        MODIFY_REG(COMP->CSR, COMP_CSR_OUTSEL  |
                              COMP_CSR_WNDWE   |
                              COMP_CSR_SPEED          ,
                              hcomp->Init.Output     |
                              hcomp->Init.WindowMode |
                              hcomp->Init.Mode        );
      }
      else
      {
        MODIFY_REG(COMP->CSR, COMP_CSR_OUTSEL  |
                              COMP_CSR_INSEL   |
                              COMP_CSR_WNDWE   |
                              COMP_CSR_SPEED              ,
                              hcomp->Init.Output         |
                              hcomp->Init.InvertingInput |
                              hcomp->Init.WindowMode     |
                              hcomp->Init.Mode            );
      }
    }
    
    /* Configure Routing Interface (RI) switches for comparator non-inverting */
    /* input.                                                                 */
    /* Except in 2 cases:                                                     */
    /* - if non-inverting input has no selection: it can be the case for      */
    /*   COMP1 in window mode.                                                */
    /* - particular case for PC3: if switch COMP1_SW1 is closed               */
    /*   (by macro "__HAL_OPAMP_OPAMP3OUT_CONNECT_ADC_COMP1()" or             */
    /*   "__HAL_RI_SWITCH_COMP1_SW1_CLOSE()"), connection between pin PC3     */
    /*    (or OPAMP3, if available) and COMP1 is done directly, without going */
    /*    through ADC switch matrix.                                          */
    if (__COMP_ROUTING_INTERFACE_TOBECONFIGURED(hcomp))
    {
      if (hcomp->Instance == COMP1)
      {
        /* Enable the switch control mode */
        __HAL_RI_SWITCHCONTROLMODE_ENABLE();

        /* Close the analog switch of ADC switch matrix to COMP1 (ADC         */
        /* channel 26: Vcomp)                                                 */
        __HAL_RI_IOSWITCH_CLOSE(RI_IOSWITCH_VCOMP);
      }

      /* Close the I/O analog switch corresponding to comparator              */
      /* non-inverting input selected.                                        */
      __HAL_RI_IOSWITCH_CLOSE(hcomp->Init.NonInvertingInput);
    }

    
    /* Initialize the COMP state*/
    if(hcomp->State == HAL_COMP_STATE_RESET)
    {
      hcomp->State = HAL_COMP_STATE_READY;
    }
  }
  
  return status;
}
Example #7
0
/**
  * @brief  Initializes the COMP according to the specified
  *         parameters in the COMP_InitTypeDef and create the associated handle.
  * @note   If the selected comparator is locked, initialization can't be performed.
  *         To unlock the configuration, perform a system reset.
  * @param  hcomp: COMP handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp)
{ 
  HAL_StatusTypeDef status = HAL_OK;
  uint32_t regshift = COMP_CSR_COMP1_SHIFT;
  
  /* Check the COMP handle allocation and lock status */
  if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET))
  {
    status = HAL_ERROR;
  }
  else
  {
    /* Check the parameter */
    assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance));
    assert_param(IS_COMP_INVERTINGINPUT(hcomp->Init.InvertingInput));
    assert_param(IS_COMP_NONINVERTINGINPUT(hcomp->Init.NonInvertingInput));
    assert_param(IS_COMP_OUTPUT(hcomp->Init.Output));
    assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol));
    assert_param(IS_COMP_HYSTERESIS(hcomp->Init.Hysteresis));
    assert_param(IS_COMP_MODE(hcomp->Init.Mode));
    
    if(hcomp->Init.NonInvertingInput == COMP_NONINVERTINGINPUT_DAC1SWITCHCLOSED)
    {
      assert_param(IS_COMP_DAC1SWITCH_INSTANCE(hcomp->Instance));
    }
  
    if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLED)
    {
      assert_param(IS_COMP_WINDOWMODE_INSTANCE(hcomp->Instance));
    }
  
    if(hcomp->State == HAL_COMP_STATE_RESET)
    {
      /* Init SYSCFG and the low level hardware to access comparators */
      __SYSCFG_CLK_ENABLE();

      HAL_COMP_MspInit(hcomp);
    }
  
    /* Set COMP parameters */
    /*     Set COMPxINSEL bits according to hcomp->Init.InvertingInput value        */
    /*     Set COMPxOUTSEL bits according to hcomp->Init.Output value               */
    /*     Set COMPxPOL bit according to hcomp->Init.OutputPol value                */
    /*     Set COMPxHYST bits according to hcomp->Init.Hysteresis value             */
    /*     Set COMPxMODE bits according to hcomp->Init.Mode value                   */
    if(hcomp->Instance == COMP2)
    {
      regshift = COMP_CSR_COMP2_SHIFT;
    }
    MODIFY_REG(COMP->CSR, 
               (uint32_t)(COMP_CSR_COMPxINSEL  | COMP_CSR_COMPxNONINSEL_MASK | \
                COMP_CSR_COMPxOUTSEL | COMP_CSR_COMPxPOL           | \
                COMP_CSR_COMPxHYST   | COMP_CSR_COMPxMODE) << regshift,
               (hcomp->Init.InvertingInput    | \
                hcomp->Init.NonInvertingInput | \
                hcomp->Init.Output            | \
                hcomp->Init.OutputPol         | \
                hcomp->Init.Hysteresis        | \
                hcomp->Init.Mode) << regshift);   
    
    if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLED)
    {
      COMP->CSR |= COMP_CSR_WNDWEN;
    }

    /* Initialize the COMP state*/
    if(hcomp->State == HAL_COMP_STATE_RESET)
    {
      hcomp->State = HAL_COMP_STATE_READY;
    }
  }
  
  return status;
}