kopia lustrzana https://github.com/micropython/micropython
109 wiersze
3.1 KiB
C
109 wiersze
3.1 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2024 NXP
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "board.h"
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#include "fsl_lpadc.h"
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#include "fsl_spc.h"
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#include "fsl_vref.h"
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#include "drv_adc.h"
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int drv_adc_init(drv_adc_t *adc, uint8_t id) {
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adc->instance = MCX_BoardGetADCInstance(id);
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if (adc->instance == NULL) {
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return -EINVAL;
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}
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adc->id = id;
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int adc_inputfreq = MCX_BoardConfigureADCClock(id);
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if (adc_inputfreq <= 0) {
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return -EINVAL;
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}
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ADC_Type *lpadc = adc->instance;
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SPC_EnableActiveModeAnalogModules(SPC0, kSPC_controlVref);
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vref_config_t vref_cfg;
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VREF_GetDefaultConfig(&vref_cfg);
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vref_cfg.bufferMode = kVREF_ModeBandgapOnly;
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VREF_Init(VREF0, &vref_cfg);
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lpadc_config_t adc_cfg;
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LPADC_GetDefaultConfig(&adc_cfg);
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adc_cfg.enableAnalogPreliminary = true;
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adc_cfg.referenceVoltageSource = kLPADC_ReferenceVoltageAlt3;
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LPADC_Init(lpadc, &adc_cfg);
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LPADC_DoOffsetCalibration(lpadc);
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LPADC_DoAutoCalibration(lpadc);
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return 0;
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}
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int drv_adc_measure(drv_adc_t *adc, drv_adc_side_t side, uint8_t ch, uint16_t *result) {
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ADC_Type *lpadc = adc->instance;
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lpadc_conv_command_config_t cmd_cfg;
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LPADC_GetDefaultConvCommandConfig(&cmd_cfg);
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cmd_cfg.channelNumber = ch;
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cmd_cfg.conversionResolutionMode = kLPADC_ConversionResolutionHigh;
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if (side == DRV_ADCSideA) {
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cmd_cfg.sampleChannelMode = kLPADC_SampleChannelSingleEndSideA;
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} else {
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cmd_cfg.sampleChannelMode = kLPADC_SampleChannelSingleEndSideB;
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}
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LPADC_SetConvCommandConfig(lpadc, 15, &cmd_cfg);
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lpadc_conv_trigger_config_t trig_cfg;
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LPADC_GetDefaultConvTriggerConfig(&trig_cfg);
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trig_cfg.targetCommandId = 15;
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trig_cfg.enableHardwareTrigger = false;
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LPADC_SetConvTriggerConfig(lpadc, 0U, &trig_cfg);
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LPADC_DoSoftwareTrigger(lpadc, 1U << 0U);
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lpadc_conv_result_t rs;
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while (!LPADC_GetConvResult(lpadc, &rs, 0U)) {
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;
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}
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*result = rs.convValue;
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return 0;
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}
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