/**************************************************************************//**
 * @file     adc.c
 * @version  V3.00
 * $Revision: 4 $
 * $Date: 14/07/30 11:22a $
 * @brief    NUC029xDE series ADC driver source file
 *
 * @note
 * SPDX-License-Identifier: Apache-2.0
 * Copyright (C) 2018 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "NUC029xDE.h"

/** @addtogroup NUC029xDE_Device_Driver NUC029xDE Device Driver
  @{
*/

/** @addtogroup ADC_Driver ADC Driver
  @{
*/

/** @addtogroup NUC131_ADC_EXPORTED_FUNCTIONS ADC Exported Functions
  @{
*/

/**
  * @brief This function configures ADC module to be ready for convert the input from selected channel.
  * @param[in] adc The pointer of the specified ADC module.
  * @param[in] u32InputMode Decides the ADC analog input mode. Valid values are:
  *                       - \ref ADC_ADCR_DIFFEN_SINGLE_END         :Single end input mode.
  *                       - \ref ADC_ADCR_DIFFEN_DIFFERENTIAL       :Differential input type.
  * @param[in] u32OpMode Decides the ADC operation mode. Valid values are:
  *                       - \ref ADC_ADCR_ADMD_SINGLE               :Single mode.
  *                       - \ref ADC_ADCR_ADMD_SINGLE_CYCLE         :Single cycle scan mode.
  *                       - \ref ADC_ADCR_ADMD_CONTINUOUS           :Continuous scan mode.
  * @param[in] u32ChMask Channel enable bit. Each bit corresponds to a input channel. Bit 0 is channel 0, bit 1 is channel 1..., bit 7 is channel 7.
  * @return  None
  * @details Before starting A/D conversion function, ADEN(ADCR[0]) should be set to 1.
  * @note NUC029xDE series MCU ADC can only convert 1 channel at a time. If more than 1 channels are enabled, only channel
  *       with smallest number will be convert.
  * @note This function does not turn on ADC power nor does trigger ADC conversion.
  */
void ADC_Open(ADC_T *adc,
              uint32_t u32InputMode,
              uint32_t u32OpMode,
              uint32_t u32ChMask)
{
    (adc)->ADCR = ((adc)->ADCR & (~(ADC_ADCR_DIFFEN_Msk | ADC_ADCR_ADMD_Msk))) | \
                (u32InputMode) | \
                (u32OpMode);

    (adc)->ADCHER = ((adc)->ADCHER & ~ADC_ADCHER_CHEN_Msk) | (u32ChMask);

    return;
}

/**
  * @brief Disable ADC module.
  * @param[in] adc The pointer of the specified ADC module.
  * @return None
  * @details  Disable A/D converter analog circuit for saving power consumption.
  */
void ADC_Close(ADC_T *adc)
{
    (adc)->ADCR &= (~ADC_ADCR_ADEN_Msk);
    return;
}

/**
  * @brief Configure the hardware trigger condition and enable hardware trigger.
  * @param[in] adc The pointer of the specified ADC module.
  * @param[in] u32Source Decides the hardware trigger source. Valid values are:
  *                       - \ref ADC_ADCR_TRGS_STADC                    :A/D conversion is started by external STADC pin.
  *                       - \ref ADC_ADCR_TRGS_PWM                      :A/D conversion is started by PWM.
  * @param[in] u32Param ADC trigger by external pin, this parameter is used to set trigger condition. Valid values are:
  *                      - \ref ADC_ADCR_TRGCOND_LOW_LEVEL     :STADC Low level active.
  *                      - \ref ADC_ADCR_TRGCOND_HIGH_LEVEL    :STADC High level active.
  *                      - \ref ADC_ADCR_TRGCOND_FALLING_EDGE  :STADC Falling edge active.
  *                      - \ref ADC_ADCR_TRGCOND_RISING_EDGE   :STADC Rising edge active.
  * @return None
  * @details Software should disable TRGEN (ADCR[8]) and ADST (ADCR[11]) before change TRGS(ADCR[5:4]).
  */
void ADC_EnableHWTrigger(ADC_T *adc,
                         uint32_t u32Source,
                         uint32_t u32Param)
{
    (adc)->ADCR &= ~(ADC_ADCR_TRGS_Msk | ADC_ADCR_TRGCOND_Msk | ADC_ADCR_TRGEN_Msk);

    (adc)->ADCR |= (u32Source) | (u32Param) | ADC_ADCR_TRGEN_Msk;

    return;
}

/**
  * @brief Disable hardware trigger ADC function.
  * @param[in] adc The pointer of the specified ADC module.
  * @return None
  * @details  Disable triggering of A/D conversion by hardware (external STADC pin or PWM Center-aligned trigger).
  */
void ADC_DisableHWTrigger(ADC_T *adc)
{
    (adc)->ADCR &= ~(ADC_ADCR_TRGS_Msk | ADC_ADCR_TRGCOND_Msk | ADC_ADCR_TRGEN_Msk);
    return;
}

/**
  * @brief Enable the interrupt(s) selected by u32Mask parameter.
  * @param[in] adc The pointer of the specified ADC module.
  * @param[in] u32Mask  The combination of interrupt status bits listed below. Each bit
  *                     corresponds to a interrupt status. This parameter decides which
  *                     interrupts will be enabled.
  *                      - \ref ADC_ADF_INT    :ADC convert complete interrupt.
  *                      - \ref ADC_CMP0_INT   :ADC comparator 0 interrupt.
  *                      - \ref ADC_CMP1_INT   :ADC comparator 1 interrupt.
  * @return None
  * @details  A/D conversion end interrupt request is generated if ADIE bit (ADCR[1]) is set to 1.
  *           If the compare function is enabled and the compare condition matches the setting of CMPCOND (ADCMPR0/1[2])
  *           and CMPMATCNT (ADCMPR0/1[11:8]), CMPF0/1 bit (ADSR[1]/[2]) will be asserted, in the meanwhile,
  *           if CMPIE (ADCMPR0/1[1]) is set to 1, a compare interrupt request is generated.
  */
void ADC_EnableInt(ADC_T *adc, uint32_t u32Mask)
{
    if((u32Mask) & ADC_ADF_INT)
        (adc)->ADCR |= ADC_ADCR_ADIE_Msk;
    if((u32Mask) & ADC_CMP0_INT)
        (adc)->ADCMPR[0] |= ADC_ADCMPR_CMPIE_Msk;
    if((u32Mask) & ADC_CMP1_INT)
        (adc)->ADCMPR[1] |= ADC_ADCMPR_CMPIE_Msk;

    return;
}

/**
  * @brief Disable the interrupt(s) selected by u32Mask parameter.
  * @param[in] adc The pointer of the specified ADC module.
  * @param[in] u32Mask  The combination of interrupt status bits listed below. Each bit
  *                     corresponds to a interrupt status. This parameter decides which
  *                     interrupts will be disabled.
  *                      - \ref ADC_ADF_INT    :ADC convert complete interrupt.
  *                      - \ref ADC_CMP0_INT   :ADC comparator 0 interrupt.
  *                      - \ref ADC_CMP1_INT   :ADC comparator 1 interrupt.
  * @return None
  * @details  The function is used to disable convert complete interrupt, comparator 0 interrupt or comparator 1 interrupt.
  */
void ADC_DisableInt(ADC_T *adc, uint32_t u32Mask)
{
    if((u32Mask) & ADC_ADF_INT)
        (adc)->ADCR &= ~ADC_ADCR_ADIE_Msk;
    if((u32Mask) & ADC_CMP0_INT)
        (adc)->ADCMPR[0] &= ~ADC_ADCMPR_CMPIE_Msk;
    if((u32Mask) & ADC_CMP1_INT)
        (adc)->ADCMPR[1] &= ~ADC_ADCMPR_CMPIE_Msk;

    return;
}



/*@}*/ /* end of group NUC131_ADC_EXPORTED_FUNCTIONS */

/*@}*/ /* end of group ADC_Driver */

/*@}*/ /* end of group NUC029xDE_Device_Driver */

/*** (C) COPYRIGHT 2018 Nuvoton Technology Corp. ***/
