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74d04c0262
Replaces the deprecated ESP32 calibration API with the "line" method instead. This work was funded through GitHub Sponsors. Signed-off-by: Angus Gratton <angus@redyak.com.au>
111 lines
3.6 KiB
C
111 lines
3.6 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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#include "esp_adc/adc_cali_scheme.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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}
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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 = 0;
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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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#if (SOC_ADC_PERIPH_NUM >= 2)
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check_esp_err(adc2_get_raw(channel_id, self->width, &raw));
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#endif
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}
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return raw;
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}
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static esp_err_t ensure_adc_calibration(machine_adc_block_obj_t *self, adc_atten_t atten) {
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if (self->handle[atten] != NULL) {
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return ESP_OK;
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}
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#if ADC_CALI_SCHEME_CURVE_FITTING_SUPPORTED
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adc_cali_curve_fitting_config_t cali_config = {
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.unit_id = self->unit_id,
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.atten = atten,
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.bitwidth = self->width,
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};
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return adc_cali_create_scheme_curve_fitting(&cali_config, &self->handle[atten]);
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#else
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adc_cali_line_fitting_config_t cali_config = {
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.unit_id = self->unit_id,
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.atten = atten,
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.bitwidth = self->width,
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};
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return adc_cali_create_scheme_line_fitting(&cali_config, &self->handle[atten]);
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#endif
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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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int uv;
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check_esp_err(ensure_adc_calibration(self, atten));
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check_esp_err(adc_cali_raw_to_voltage(self->handle[atten], raw, &uv));
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return (mp_int_t)uv * 1000;
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}
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