88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
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/**************************************************************************//**
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* @file adc.c
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* @brief ADC driver source file
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*
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* SPDX-License-Identifier: Apache-2.0
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* @copyright(C) 2020 Nuvoton Technology Corp. All rights reserved.
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*****************************************************************************/
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#include "NuMicro.h"
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/** @addtogroup Standard_Driver Standard Driver
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@{
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*/
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/** @addtogroup ADC_Driver ADC Driver
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@{
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*/
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/** @addtogroup ADC_EXPORTED_FUNCTIONS ADC Exported Functions
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@{
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*/
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/**
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* @brief This API configures ADC module to be ready for convert the input from selected channel
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* @param[in] adc Base address of ADC module
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* @param[in] u32InputMode Input mode. Valid values are:
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* - \ref ADC_INPUT_MODE_NORMAL_CONV
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* - \ref ADC_INPUT_MODE_4WIRE_TOUCH
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* - \ref ADC_INPUT_MODE_5WIRE_TOUCH
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* @param[in] u32OpMode Could be
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* - \ref ADC_HIGH_SPEED_MODE
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* - \ref ADC_NORMAL_SPEED_MODE
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* @param[in] u32ChMask Channel enable bit. Each bit corresponds to a input channel. Bit 0 is channel 0, bit 1 is channel 1...
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* This parameter is only used while u32InputMode set to ADC_INPUT_MODE_NORMAL_CONV.
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* @return None
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* @note ADC can only convert 1 channel at a time. If more than 1 channels are enabled, only channel
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* with smallest number will be convert.
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* @note This API does not turn on ADC power nor does trigger ADC conversion
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*/
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void ADC_Open(ADC_T *adc,
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uint32_t u32InputMode,
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uint32_t u32OpMode,
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uint32_t u32ChMask)
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{
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uint32_t u32Ch = 0, i;
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if (u32InputMode == ADC_INPUT_MODE_NORMAL_CONV)
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{
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for (i = 0; i < ADC_CH_NUM; i++)
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{
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if (u32ChMask & (1 << i))
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{
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u32Ch = i;
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break;
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}
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}
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adc->CONF = (u32Ch << ADC_CONF_CHSEL_Pos) | u32OpMode | ADC_CONF_NACEN_Msk;
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}
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else if (u32InputMode == ADC_INPUT_MODE_4WIRE_TOUCH)
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{
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adc->CONF = 0;
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}
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else // 5-wire mode
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{
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adc->CTL |= ADC_CTL_WMSWCH_Msk;
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adc->CONF = 0;
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}
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}
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/**
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* @brief Disable ADC module
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* @param[in] adc Base address of ADC module
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* @return None
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*/
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void ADC_Close(ADC_T *adc)
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{
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adc->CTL = 0;
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adc->CONF = 0;
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adc->IER = 0;
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adc->ISR = adc->ISR;
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}
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/*@}*/ /* end of group ADC_EXPORTED_FUNCTIONS */
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/*@}*/ /* end of group ADC_Driver */
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/*@}*/ /* end of group Standard_Driver */
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