kopia lustrzana https://github.com/micropython/micropython
93 wiersze
3.3 KiB
C
93 wiersze
3.3 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) 2017 Nick Moore
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* Copyright (c) 2021 Jonathan Hogg
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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 "py/mphal.h"
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#include "adc.h"
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#include "driver/adc.h"
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#define DEFAULT_VREF 1100
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void madcblock_bits_helper(machine_adc_block_obj_t *self, mp_int_t bits) {
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switch (bits) {
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#if CONFIG_IDF_TARGET_ESP32
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case 9:
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self->width = ADC_WIDTH_BIT_9;
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break;
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case 10:
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self->width = ADC_WIDTH_BIT_10;
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break;
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case 11:
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self->width = ADC_WIDTH_BIT_11;
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break;
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#endif
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#if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
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case 12:
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self->width = ADC_WIDTH_BIT_12;
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break;
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#endif
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#if CONFIG_IDF_TARGET_ESP32S2
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case 13:
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self->width = ADC_WIDTH_BIT_13;
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break;
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#endif
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default:
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mp_raise_ValueError(MP_ERROR_TEXT("invalid bits"));
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}
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self->bits = bits;
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if (self->unit_id == ADC_UNIT_1) {
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adc1_config_width(self->width);
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}
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for (adc_atten_t atten = ADC_ATTEN_DB_0; atten < ADC_ATTEN_MAX; atten++) {
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if (self->characteristics[atten] != NULL) {
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esp_adc_cal_characterize(self->unit_id, atten, self->width, DEFAULT_VREF, self->characteristics[atten]);
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}
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}
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}
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mp_int_t madcblock_read_helper(machine_adc_block_obj_t *self, adc_channel_t channel_id) {
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int raw;
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if (self->unit_id == ADC_UNIT_1) {
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raw = adc1_get_raw(channel_id);
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} else {
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check_esp_err(adc2_get_raw(channel_id, self->width, &raw));
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}
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return raw;
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}
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mp_int_t madcblock_read_uv_helper(machine_adc_block_obj_t *self, adc_channel_t channel_id, adc_atten_t atten) {
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int raw = madcblock_read_helper(self, channel_id);
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esp_adc_cal_characteristics_t *adc_chars = self->characteristics[atten];
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if (adc_chars == NULL) {
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adc_chars = malloc(sizeof(esp_adc_cal_characteristics_t));
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esp_adc_cal_characterize(self->unit_id, atten, self->width, DEFAULT_VREF, adc_chars);
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self->characteristics[atten] = adc_chars;
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}
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mp_int_t uv = esp_adc_cal_raw_to_voltage(raw, adc_chars) * 1000;
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return uv;
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}
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