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targets/TARGET_NORDIC/TARGET_NRF5/TARGET_SDK11/drivers_nrf/hal/nrf_adc.c@180:d79f997829d6, 2017-12-18 (annotated)

Committer:
Anythingconnected
Date:
Mon Dec 18 10:14:27 2017 +0000
Revision:
180:d79f997829d6
Parent:
165:e614a9f1c9e2 
Getting byte by byte read to work

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /*
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2014 Nordic Semiconductor ASA
<> 144:ef7eb2e8f9f7 3 * All rights reserved.
<> 144:ef7eb2e8f9f7 4 *
<> 144:ef7eb2e8f9f7 5 * Redistribution and use in source and binary forms, with or without modification,
<> 144:ef7eb2e8f9f7 6 * are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * 1. Redistributions of source code must retain the above copyright notice, this list
<> 144:ef7eb2e8f9f7 9 * of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 10 *
<> 144:ef7eb2e8f9f7 11 * 2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA
<> 144:ef7eb2e8f9f7 12 * integrated circuit in a product or a software update for such product, must reproduce
<> 144:ef7eb2e8f9f7 13 * the above copyright notice, this list of conditions and the following disclaimer in
<> 144:ef7eb2e8f9f7 14 * the documentation and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 15 *
<> 144:ef7eb2e8f9f7 16 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be
<> 144:ef7eb2e8f9f7 17 * used to endorse or promote products derived from this software without specific prior
<> 144:ef7eb2e8f9f7 18 * written permission.
<> 144:ef7eb2e8f9f7 19 *
<> 144:ef7eb2e8f9f7 20 * 4. This software, with or without modification, must only be used with a
<> 144:ef7eb2e8f9f7 21 * Nordic Semiconductor ASA integrated circuit.
<> 144:ef7eb2e8f9f7 22 *
<> 144:ef7eb2e8f9f7 23 * 5. Any software provided in binary or object form under this license must not be reverse
<> 144:ef7eb2e8f9f7 24 * engineered, decompiled, modified and/or disassembled.
<> 144:ef7eb2e8f9f7 25 *
<> 144:ef7eb2e8f9f7 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
<> 144:ef7eb2e8f9f7 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
<> 144:ef7eb2e8f9f7 28 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 29 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
<> 144:ef7eb2e8f9f7 30 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
<> 144:ef7eb2e8f9f7 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
<> 144:ef7eb2e8f9f7 32 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
<> 144:ef7eb2e8f9f7 33 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
<> 144:ef7eb2e8f9f7 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
<> 144:ef7eb2e8f9f7 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 36 *
<> 144:ef7eb2e8f9f7 37 */
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39
<> 144:ef7eb2e8f9f7 40 /**
<> 144:ef7eb2e8f9f7 41 * @file
<> 144:ef7eb2e8f9f7 42 * @brief ADC HAL implementation
<> 144:ef7eb2e8f9f7 43 */
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 #include "nrf_adc.h"
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47 #ifndef NRF52
<> 144:ef7eb2e8f9f7 48
<> 144:ef7eb2e8f9f7 49 /**
<> 144:ef7eb2e8f9f7 50 * @brief Function for configuring ADC.
<> 144:ef7eb2e8f9f7 51 *
<> 144:ef7eb2e8f9f7 52 * This function powers on ADC and configures it. ADC is in DISABLE state after configuration,
<> 144:ef7eb2e8f9f7 53 * so it should be enabled before using it.
<> 144:ef7eb2e8f9f7 54 *
<> 144:ef7eb2e8f9f7 55 * @param[in] config Requested configuration.
<> 144:ef7eb2e8f9f7 56 */
<> 144:ef7eb2e8f9f7 57 void nrf_adc_configure(nrf_adc_config_t * config)
<> 144:ef7eb2e8f9f7 58 {
<> 144:ef7eb2e8f9f7 59 uint32_t config_reg = 0;
<> 144:ef7eb2e8f9f7 60
<> 144:ef7eb2e8f9f7 61 config_reg |= ((uint32_t)config->resolution << ADC_CONFIG_RES_Pos) & ADC_CONFIG_RES_Msk;
<> 144:ef7eb2e8f9f7 62 config_reg |= ((uint32_t)config->scaling << ADC_CONFIG_INPSEL_Pos) & ADC_CONFIG_INPSEL_Msk;
<> 144:ef7eb2e8f9f7 63 config_reg |= ((uint32_t)config->reference << ADC_CONFIG_REFSEL_Pos) & ADC_CONFIG_REFSEL_Msk;
<> 144:ef7eb2e8f9f7 64
<> 144:ef7eb2e8f9f7 65 if (config->reference & ADC_CONFIG_EXTREFSEL_Msk)
<> 144:ef7eb2e8f9f7 66 {
<> 144:ef7eb2e8f9f7 67 config_reg |= config->reference & ADC_CONFIG_EXTREFSEL_Msk;
<> 144:ef7eb2e8f9f7 68 }
<> 144:ef7eb2e8f9f7 69
<> 144:ef7eb2e8f9f7 70 /* select input */
<> 144:ef7eb2e8f9f7 71 nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_DISABLED);
<> 144:ef7eb2e8f9f7 72
<> 144:ef7eb2e8f9f7 73 /* set new configuration keeping selected input */
<> 144:ef7eb2e8f9f7 74 NRF_ADC->CONFIG = config_reg | (NRF_ADC->CONFIG & ADC_CONFIG_PSEL_Msk);
<> 144:ef7eb2e8f9f7 75 }
<> 144:ef7eb2e8f9f7 76
<> 144:ef7eb2e8f9f7 77
<> 144:ef7eb2e8f9f7 78 /**
<> 144:ef7eb2e8f9f7 79 * @brief Blocking function for executing single ADC conversion.
<> 144:ef7eb2e8f9f7 80 *
<> 144:ef7eb2e8f9f7 81 * This function selects the desired input, starts a single conversion,
<> 144:ef7eb2e8f9f7 82 * waits for it to finish, and returns the result.
<> 144:ef7eb2e8f9f7 83 * ADC is left in STOP state, the given input is selected.
<> 144:ef7eb2e8f9f7 84 * This function does not check if ADC is initialized and powered.
<> 144:ef7eb2e8f9f7 85 *
<> 144:ef7eb2e8f9f7 86 * @param[in] input Requested input to be selected.
<> 144:ef7eb2e8f9f7 87 *
<> 144:ef7eb2e8f9f7 88 * @return Conversion result
<> 144:ef7eb2e8f9f7 89 */
<> 144:ef7eb2e8f9f7 90 int32_t nrf_adc_convert_single(nrf_adc_config_input_t input)
<> 144:ef7eb2e8f9f7 91 {
<> 144:ef7eb2e8f9f7 92 int32_t val;
<> 144:ef7eb2e8f9f7 93
<> 144:ef7eb2e8f9f7 94 nrf_adc_input_select(input);
<> 144:ef7eb2e8f9f7 95 nrf_adc_start();
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97 while (!nrf_adc_conversion_finished())
<> 144:ef7eb2e8f9f7 98 {
<> 144:ef7eb2e8f9f7 99 }
<> 144:ef7eb2e8f9f7 100 nrf_adc_conversion_event_clean();
<> 144:ef7eb2e8f9f7 101 val = nrf_adc_result_get();
<> 144:ef7eb2e8f9f7 102 nrf_adc_stop();
<> 144:ef7eb2e8f9f7 103 return val;
<> 144:ef7eb2e8f9f7 104 }
<> 144:ef7eb2e8f9f7 105 #endif