mirror of
https://github.com/jam422470459/EPD-nRF52-hema213.git
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107 lines
3.7 KiB
C
107 lines
3.7 KiB
C
/**
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* Copyright (c) 2014 - 2017, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* @file
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* @brief ADC HAL implementation
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*/
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#include "nrf_adc.h"
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#ifdef ADC_PRESENT
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/**
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* @brief Function for configuring ADC.
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*
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* This function powers on ADC and configures it. ADC is in DISABLE state after configuration,
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* so it should be enabled before using it.
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*
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* @param[in] config Requested configuration.
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*/
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void nrf_adc_configure(nrf_adc_config_t * config)
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{
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uint32_t config_reg = 0;
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config_reg |= ((uint32_t)config->resolution << ADC_CONFIG_RES_Pos) & ADC_CONFIG_RES_Msk;
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config_reg |= ((uint32_t)config->scaling << ADC_CONFIG_INPSEL_Pos) & ADC_CONFIG_INPSEL_Msk;
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config_reg |= ((uint32_t)config->reference << ADC_CONFIG_REFSEL_Pos) & ADC_CONFIG_REFSEL_Msk;
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if (config->reference & ADC_CONFIG_EXTREFSEL_Msk)
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{
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config_reg |= config->reference & ADC_CONFIG_EXTREFSEL_Msk;
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}
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/* select input */
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nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_DISABLED);
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/* set new configuration keeping selected input */
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NRF_ADC->CONFIG = config_reg | (NRF_ADC->CONFIG & ADC_CONFIG_PSEL_Msk);
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}
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/**
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* @brief Blocking function for executing single ADC conversion.
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*
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* This function selects the desired input, starts a single conversion,
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* waits for it to finish, and returns the result.
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* ADC is left in STOP state, the given input is selected.
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* This function does not check if ADC is initialized and powered.
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*
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* @param[in] input Requested input to be selected.
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*
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* @return Conversion result
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*/
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int32_t nrf_adc_convert_single(nrf_adc_config_input_t input)
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{
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int32_t val;
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nrf_adc_input_select(input);
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nrf_adc_start();
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while (!nrf_adc_conversion_finished())
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{
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}
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nrf_adc_conversion_event_clean();
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val = nrf_adc_result_get();
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nrf_adc_stop();
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return val;
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}
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#endif
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