rt-thread/bsp/nuvoton_nuc472/Libraries/StdDriver/src/acmp.c

/**************************************************************************//**
 * @file     acmp.c
 * @version  V1.00
 * $Revision: 4 $
 * $Date: 15/11/04 7:32p $
 * @brief    NUC472/NUC442 Analog Comparator(ACMP) driver source file
 *
 * @note
 * Copyright (C) 2014 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/

#include "NUC472_442.h"

#ifdef __cplusplus
extern "C"
{
#endif

/** @addtogroup NUC472_442_Device_Driver NUC472/NUC442 Device Driver
  @{
*/

/** @addtogroup NUC472_442_ACMP_Driver ACMP Driver
  @{
*/


/** @addtogroup NUC472_442_ACMP_EXPORTED_FUNCTIONS ACMP Exported Functions
  @{
*/


/**
  * @brief  Configure the specified ACMP module
  *
  * @param[in]  acmp The base address of ACMP module
  * @param[in]  u32ChNum comparator number, could be 0, 1, 2
  * @param[in]  u32NegSrc is comparator negative input selection.  Including:
  *                  - \ref ACMP_VNEG_PIN
  *                  - \ref ACMP_VNEG_BANDGAP
  *                  - \ref ACMP_VNEG_4_OVER_24_VDD
  *                  - \ref ACMP_VNEG_5_OVER_24_VDD
  *                  - \ref ACMP_VNEG_6_OVER_24_VDD
  *                  - \ref ACMP_VNEG_7_OVER_24_VDD
  *                  - \ref ACMP_VNEG_8_OVER_24_VDD
  *                  - \ref ACMP_VNEG_9_OVER_24_VDD
  *                  - \ref ACMP_VNEG_10_OVER_24_VDD
  *                  - \ref ACMP_VNEG_11_OVER_24_VDD
  *                  - \ref ACMP_VNEG_12_OVER_24_VDD
  *                  - \ref ACMP_VNEG_13_OVER_24_VDD
  *                  - \ref ACMP_VNEG_14_OVER_24_VDD
  *                  - \ref ACMP_VNEG_15_OVER_24_VDD
  *                  - \ref ACMP_VNEG_16_OVER_24_VDD
  *                  - \ref ACMP_VNEG_17_OVER_24_VDD
  *                  - \ref ACMP_VNEG_18_OVER_24_VDD
  *                  - \ref ACMP_VNEG_19_OVER_24_VDD
  *                  - \ref ACMP_VNEG_4_OVER_24_IREF
  *                  - \ref ACMP_VNEG_5_OVER_24_IREF
  *                  - \ref ACMP_VNEG_6_OVER_24_IREF
  *                  - \ref ACMP_VNEG_7_OVER_24_IREF
  *                  - \ref ACMP_VNEG_8_OVER_24_IREF
  *                  - \ref ACMP_VNEG_9_OVER_24_IREF
  *                  - \ref ACMP_VNEG_10_OVER_24_IREF
  *                  - \ref ACMP_VNEG_11_OVER_24_IREF
  *                  - \ref ACMP_VNEG_12_OVER_24_IREF
  *                  - \ref ACMP_VNEG_13_OVER_24_IREF
  *                  - \ref ACMP_VNEG_14_OVER_24_IREF
  *                  - \ref ACMP_VNEG_15_OVER_24_IREF
  *                  - \ref ACMP_VNEG_16_OVER_24_IREF
  *                  - \ref ACMP_VNEG_17_OVER_24_IREF
  *                  - \ref ACMP_VNEG_18_OVER_24_IREF
  *                  - \ref ACMP_VNEG_19_OVER_24_IREF
  *
  * @param[in]  u32HysteresisEn is the hysteresis function option. Including:
  *                  - \ref ACMP_HYSTERESIS_ENABLE
  *                  - \ref ACMP_HYSTERESIS_DISABLE
  * @return None
  */
void ACMP_Open(ACMP_T *acmp, uint32_t u32ChNum, uint32_t u32NegSrc, uint32_t u32HysteresisEn)
{
    if((u32NegSrc != ACMP_VNEG_PIN) && (u32NegSrc != ACMP_VNEG_BANDGAP))
        ACMP->VREF = u32NegSrc | ACMP_VREF_IREFSEL_Msk;
    ACMP->CTL[u32ChNum] = (ACMP->CTL[u32ChNum] & (~(ACMP_CTL_NEGSEL_Msk | ACMP_CTL_HYSEN_Msk))) |
                          ((u32NegSrc != ACMP_VNEG_PIN ? ACMP_CTL_NEGSEL_Msk : 0) | u32HysteresisEn | ACMP_CTL_ACMPEN_Msk);
}

/**
  * @brief  This function close comparator
  *
  * @param[in]  acmp The base address of ACMP module
  * @param[in]  u32ChNum comparator number.
  *
  * @return None
  */
void ACMP_Close(ACMP_T *acmp, uint32_t u32ChNum)
{
    ACMP->CTL[u32ChNum] &= (~ACMP_CTL_ACMPEN_Msk);
}



/*@}*/ /* end of group NUC472_442_ACMP_EXPORTED_FUNCTIONS */

/*@}*/ /* end of group NUC472_442_ACMP_Driver */

/*@}*/ /* end of group NUC472_442_Device_Driver */

#ifdef __cplusplus
}
#endif

/*** (C) COPYRIGHT 2014 Nuvoton Technology Corp. ***/