/**************************************************************************//**
 * @file     adc.c
 * @version  V3.00
 * $Revision: 5 $
 * $Date: 14/02/10 2:47p $
 * @brief    M051 series ADC driver source file
 *
 * @note
 * Copyright (C) 2014 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "M051Series.h"

/** @addtogroup M051_Device_Driver M051 Device Driver
  @{
*/

/** @addtogroup M051_ADC_Driver ADC Driver
  @{
*/

/** @addtogroup M051_ADC_EXPORTED_FUNCTIONS ADC Exported Functions
  @{
*/

/**
  * @brief This API configures ADC module to be ready for convert the input from selected channel
  * @param[in] adc Base address of 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_BURST                :Burst 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
  * @note M051 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 API 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 Base address of ADC module
  * @return None
  */
void ADC_Close(ADC_T *adc)
{
    SYS->IPRSTC2 |= SYS_IPRSTC2_ADC_RST_Msk;
    SYS->IPRSTC2 &= ~SYS_IPRSTC2_ADC_RST_Msk;
    return;

}

/**
  * @brief Configure the hardware trigger condition and enable hardware trigger
  * @param[in] adc Base address of 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 While ADC trigger by PWM, this parameter is used to set the delay between PWM
  *                     trigger and ADC conversion. Valid values are from 0 ~ 0xFF, and actual delay
  *                     time is (4 * u32Param * HCLK). While 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
  * @note ADC hardware trigger source does not support PWM trigger (M05xxBN only).
  */
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);
    if(u32Source == ADC_ADCR_TRGS_STADC)
    {
        ADC->ADCR |= u32Source | u32Param | ADC_ADCR_TRGEN_Msk;
    }
    else
    {
        ADC->ADTDCR = (ADC->ADTDCR & ~ADC_ADTDCR_PTDT_Msk) | u32Param;
        ADC->ADCR |= u32Source | ADC_ADCR_TRGEN_Msk;
    }
    return;
}

/**
  * @brief Disable hardware trigger ADC function.
  * @param[in] adc Base address of ADC module
  * @return None
  */
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 Base address of 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
  */
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 Base address of 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
  */
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 M051_ADC_EXPORTED_FUNCTIONS */

/*@}*/ /* end of group M051_ADC_Driver */

/*@}*/ /* end of group M051_Device_Driver */

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