esp32/machine_adcblock: Add new machine.ADCBlock class and update ADC.
Rework the ADC implementation to follow the improved ADC/ADCBlock API. This adds support for calibrated voltage readings and the ADC2 block. The ADC API is backwards compatible with what it was before this change. Resolves #6219.
This commit is contained in:
Jonathan Hogg
committed by
Damien George
Damien George
parent
3300d6d337
commit
63438a31bb
@@ -4,6 +4,7 @@
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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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@@ -24,7 +25,6 @@
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include "esp_log.h"
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@@ -35,176 +35,213 @@
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "modmachine.h"
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#include "machine_adc.h"
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typedef struct _madc_obj_t {
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mp_obj_base_t base;
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gpio_num_t gpio_id;
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adc1_channel_t adc1_id;
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} madc_obj_t;
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#define ADCBLOCK1 (&madcblock_obj[0])
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#define ADCBLOCK2 (&madcblock_obj[1])
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STATIC const madc_obj_t madc_obj[] = {
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#if CONFIG_IDF_TARGET_ESP32
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{{&machine_adc_type}, GPIO_NUM_36, ADC1_CHANNEL_0},
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{{&machine_adc_type}, GPIO_NUM_37, ADC1_CHANNEL_1},
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{{&machine_adc_type}, GPIO_NUM_38, ADC1_CHANNEL_2},
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{{&machine_adc_type}, GPIO_NUM_39, ADC1_CHANNEL_3},
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{{&machine_adc_type}, GPIO_NUM_32, ADC1_CHANNEL_4},
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{{&machine_adc_type}, GPIO_NUM_33, ADC1_CHANNEL_5},
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{{&machine_adc_type}, GPIO_NUM_34, ADC1_CHANNEL_6},
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{{&machine_adc_type}, GPIO_NUM_35, ADC1_CHANNEL_7},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_0, GPIO_NUM_36},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_1, GPIO_NUM_37},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_2, GPIO_NUM_38},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_3, GPIO_NUM_39},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_4, GPIO_NUM_32},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_5, GPIO_NUM_33},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_6, GPIO_NUM_34},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_7, GPIO_NUM_35},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_0, GPIO_NUM_0},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_1, GPIO_NUM_2},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_2, GPIO_NUM_4},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_3, GPIO_NUM_12},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_4, GPIO_NUM_13},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_5, GPIO_NUM_14},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_6, GPIO_NUM_15},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_7, GPIO_NUM_25},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_8, GPIO_NUM_26},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_9, GPIO_NUM_27},
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#elif CONFIG_IDF_TARGET_ESP32C3
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{{&machine_adc_type}, GPIO_NUM_0, ADC1_CHANNEL_0},
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{{&machine_adc_type}, GPIO_NUM_1, ADC1_CHANNEL_1},
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{{&machine_adc_type}, GPIO_NUM_2, ADC1_CHANNEL_2},
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{{&machine_adc_type}, GPIO_NUM_3, ADC1_CHANNEL_3},
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{{&machine_adc_type}, GPIO_NUM_4, ADC1_CHANNEL_4},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_0, GPIO_NUM_0},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_1, GPIO_NUM_1},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_2, GPIO_NUM_2},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_3, GPIO_NUM_3},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_4, GPIO_NUM_4},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_0, GPIO_NUM_5},
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#elif CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3
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{{&machine_adc_type}, GPIO_NUM_1, ADC1_CHANNEL_0},
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{{&machine_adc_type}, GPIO_NUM_2, ADC1_CHANNEL_1},
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{{&machine_adc_type}, GPIO_NUM_3, ADC1_CHANNEL_2},
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{{&machine_adc_type}, GPIO_NUM_4, ADC1_CHANNEL_3},
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{{&machine_adc_type}, GPIO_NUM_5, ADC1_CHANNEL_4},
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{{&machine_adc_type}, GPIO_NUM_6, ADC1_CHANNEL_5},
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{{&machine_adc_type}, GPIO_NUM_7, ADC1_CHANNEL_6},
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{{&machine_adc_type}, GPIO_NUM_8, ADC1_CHANNEL_7},
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{{&machine_adc_type}, GPIO_NUM_9, ADC1_CHANNEL_8},
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{{&machine_adc_type}, GPIO_NUM_10, ADC1_CHANNEL_9},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_0, GPIO_NUM_1},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_1, GPIO_NUM_2},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_2, GPIO_NUM_3},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_3, GPIO_NUM_4},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_4, GPIO_NUM_5},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_5, GPIO_NUM_6},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_6, GPIO_NUM_7},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_7, GPIO_NUM_8},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_8, GPIO_NUM_9},
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{{&machine_adc_type}, ADCBLOCK1, ADC_CHANNEL_9, GPIO_NUM_10},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_0, GPIO_NUM_11},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_1, GPIO_NUM_12},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_2, GPIO_NUM_13},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_3, GPIO_NUM_14},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_4, GPIO_NUM_15},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_5, GPIO_NUM_16},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_6, GPIO_NUM_17},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_7, GPIO_NUM_18},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_8, GPIO_NUM_19},
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{{&machine_adc_type}, ADCBLOCK2, ADC_CHANNEL_9, GPIO_NUM_20},
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#endif
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};
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STATIC uint8_t adc_bit_width;
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STATIC adc_atten_t madc_obj_atten[MP_ARRAY_SIZE(madc_obj)];
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STATIC mp_obj_t madc_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw,
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const mp_obj_t *args) {
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static int initialized = 0;
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if (!initialized) {
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#if CONFIG_IDF_TARGET_ESP32S2
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adc1_config_width(ADC_WIDTH_BIT_13);
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#else
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adc1_config_width(ADC_WIDTH_BIT_12);
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#endif
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adc_bit_width = 12;
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initialized = 1;
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}
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mp_arg_check_num(n_args, n_kw, 1, 1, true);
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gpio_num_t pin_id = machine_pin_get_id(args[0]);
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const madc_obj_t *self = NULL;
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const madc_obj_t *madc_search_helper(madcblock_obj_t *block, adc_channel_t channel_id, gpio_num_t gpio_id) {
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for (int i = 0; i < MP_ARRAY_SIZE(madc_obj); i++) {
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if (pin_id == madc_obj[i].gpio_id) {
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self = &madc_obj[i];
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break;
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const madc_obj_t *adc = &madc_obj[i];
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if ((block == NULL || block == adc->block) && (channel_id == -1 || channel_id == adc->channel_id) && (gpio_id == -1 || gpio_id == adc->gpio_id)) {
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return adc;
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}
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}
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if (!self) {
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mp_raise_ValueError(MP_ERROR_TEXT("invalid Pin for ADC"));
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}
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esp_err_t err = adc1_config_channel_atten(self->adc1_id, ADC_ATTEN_0db);
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if (err == ESP_OK) {
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return MP_OBJ_FROM_PTR(self);
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}
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mp_raise_ValueError(MP_ERROR_TEXT("parameter error"));
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return NULL;
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}
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STATIC void madc_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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madc_obj_t *self = self_in;
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mp_printf(print, "ADC(Pin(%u))", self->gpio_id);
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const madc_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_printf(print, "ADC(Pin(%u), atten=%u)", self->gpio_id, madc_obj_atten[self - madc_obj]);
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}
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// read_u16()
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STATIC void madc_atten_helper(const madc_obj_t *self, mp_int_t atten) {
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esp_err_t err;
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if (self->block->unit_id == ADC_UNIT_1) {
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err = adc1_config_channel_atten(self->channel_id, atten);
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} else {
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err = adc2_config_channel_atten(self->channel_id, atten);
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}
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if (err != ESP_OK) {
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mp_raise_ValueError(MP_ERROR_TEXT("invalid atten"));
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}
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madc_obj_atten[self - madc_obj] = atten;
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}
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void madc_init_helper(const madc_obj_t *self, size_t n_pos_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum {
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ARG_atten,
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};
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_atten, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_pos_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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mp_int_t atten = args[ARG_atten].u_int;
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if (atten != -1) {
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madc_atten_helper(self, atten);
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} else if (madc_obj_atten[self - madc_obj] == -1) {
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madc_atten_helper(self, ADC_ATTEN_DB_0);
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}
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}
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STATIC mp_obj_t madc_make_new(const mp_obj_type_t *type, size_t n_pos_args, size_t n_kw_args, const mp_obj_t *args) {
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mp_arg_check_num(n_pos_args, n_kw_args, 1, MP_OBJ_FUN_ARGS_MAX, true);
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gpio_num_t gpio_id = machine_pin_get_id(args[0]);
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const madc_obj_t *self = madc_search_helper(NULL, -1, gpio_id);
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if (!self) {
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mp_raise_ValueError(MP_ERROR_TEXT("invalid pin"));
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}
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if (self->block->width == -1) {
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madcblock_bits_helper(self->block, self->block->bits);
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}
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mp_map_t kw_args;
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mp_map_init_fixed_table(&kw_args, n_kw_args, args + n_pos_args);
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madc_init_helper(self, n_pos_args - 1, args + 1, &kw_args);
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return MP_OBJ_FROM_PTR(self);
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}
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STATIC mp_obj_t madc_init(size_t n_pos_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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const madc_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
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madc_init_helper(self, n_pos_args - 1, pos_args + 1, kw_args);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_KW(madc_init_obj, 1, madc_init);
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STATIC mp_obj_t madc_block(mp_obj_t self_in) {
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const madc_obj_t *self = MP_OBJ_TO_PTR(self_in);
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return MP_OBJ_FROM_PTR(self->block);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(madc_block_obj, madc_block);
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STATIC mp_obj_t madc_read(mp_obj_t self_in) {
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const madc_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_int_t raw = madcblock_read_helper(self->block, self->channel_id);
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return MP_OBJ_NEW_SMALL_INT(raw);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(madc_read_obj, madc_read);
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STATIC mp_obj_t madc_read_u16(mp_obj_t self_in) {
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madc_obj_t *self = MP_OBJ_TO_PTR(self_in);
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uint32_t raw = adc1_get_raw(self->adc1_id);
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const madc_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_uint_t raw = madcblock_read_helper(self->block, self->channel_id);
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// Scale raw reading to 16 bit value using a Taylor expansion (for 8 <= bits <= 16)
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uint32_t u16 = raw << (16 - adc_bit_width) | raw >> (2 * adc_bit_width - 16);
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mp_int_t bits = self->block->bits;
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mp_uint_t u16 = raw << (16 - bits) | raw >> (2 * bits - 16);
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return MP_OBJ_NEW_SMALL_INT(u16);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(madc_read_u16_obj, madc_read_u16);
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// Legacy method
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STATIC mp_obj_t madc_read(mp_obj_t self_in) {
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madc_obj_t *self = self_in;
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int val = adc1_get_raw(self->adc1_id);
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if (val == -1) {
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mp_raise_ValueError(MP_ERROR_TEXT("parameter error"));
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}
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return MP_OBJ_NEW_SMALL_INT(val);
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STATIC mp_obj_t madc_read_uv(mp_obj_t self_in) {
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const madc_obj_t *self = MP_OBJ_TO_PTR(self_in);
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adc_atten_t atten = madc_obj_atten[self - madc_obj];
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return MP_OBJ_NEW_SMALL_INT(madcblock_read_uv_helper(self->block, self->channel_id, atten));
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}
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MP_DEFINE_CONST_FUN_OBJ_1(madc_read_obj, madc_read);
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(madc_read_uv_obj, madc_read_uv);
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STATIC mp_obj_t madc_atten(mp_obj_t self_in, mp_obj_t atten_in) {
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madc_obj_t *self = self_in;
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adc_atten_t atten = mp_obj_get_int(atten_in);
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esp_err_t err = adc1_config_channel_atten(self->adc1_id, atten);
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if (err == ESP_OK) {
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return mp_const_none;
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}
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mp_raise_ValueError(MP_ERROR_TEXT("parameter error"));
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const madc_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_int_t atten = mp_obj_get_int(atten_in);
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madc_atten_helper(self, atten);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(madc_atten_obj, madc_atten);
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STATIC mp_obj_t madc_width(mp_obj_t cls_in, mp_obj_t width_in) {
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adc_bits_width_t width = mp_obj_get_int(width_in);
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esp_err_t err = adc1_config_width(width);
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if (err != ESP_OK) {
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mp_raise_ValueError(MP_ERROR_TEXT("parameter error"));
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}
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switch (width) {
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#if CONFIG_IDF_TARGET_ESP32
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case ADC_WIDTH_9Bit:
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adc_bit_width = 9;
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break;
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case ADC_WIDTH_10Bit:
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adc_bit_width = 10;
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break;
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case ADC_WIDTH_11Bit:
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adc_bit_width = 11;
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break;
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case ADC_WIDTH_12Bit:
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adc_bit_width = 12;
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break;
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#elif CONFIG_IDF_TARGET_ESP32S2
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case ADC_WIDTH_BIT_13:
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adc_bit_width = 13;
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break;
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#elif CONFIG_IDF_TARGET_ESP32S3
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case ADC_WIDTH_BIT_12:
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adc_bit_width = 12;
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break;
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#endif
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default:
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break;
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}
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STATIC mp_obj_t madc_width(mp_obj_t self_in, mp_obj_t bits_in) {
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const madc_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_int_t bits = mp_obj_get_int(bits_in);
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madcblock_bits_helper(self->block, bits);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(madc_width_fun_obj, madc_width);
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MP_DEFINE_CONST_CLASSMETHOD_OBJ(madc_width_obj, MP_ROM_PTR(&madc_width_fun_obj));
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MP_DEFINE_CONST_FUN_OBJ_2(madc_width_obj, madc_width);
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STATIC const mp_rom_map_elem_t madc_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_read_u16), MP_ROM_PTR(&madc_read_u16_obj) },
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{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&madc_init_obj) },
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{ MP_ROM_QSTR(MP_QSTR_block), MP_ROM_PTR(&madc_block_obj) },
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{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&madc_read_obj) },
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{ MP_ROM_QSTR(MP_QSTR_read_u16), MP_ROM_PTR(&madc_read_u16_obj) },
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{ MP_ROM_QSTR(MP_QSTR_read_uv), MP_ROM_PTR(&madc_read_uv_obj) },
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// Legacy API methods:
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{ MP_ROM_QSTR(MP_QSTR_atten), MP_ROM_PTR(&madc_atten_obj) },
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{ MP_ROM_QSTR(MP_QSTR_width), MP_ROM_PTR(&madc_width_obj) },
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{ MP_ROM_QSTR(MP_QSTR_ATTN_0DB), MP_ROM_INT(ADC_ATTEN_0db) },
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{ MP_ROM_QSTR(MP_QSTR_ATTN_2_5DB), MP_ROM_INT(ADC_ATTEN_2_5db) },
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{ MP_ROM_QSTR(MP_QSTR_ATTN_6DB), MP_ROM_INT(ADC_ATTEN_6db) },
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{ MP_ROM_QSTR(MP_QSTR_ATTN_11DB), MP_ROM_INT(ADC_ATTEN_11db) },
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{ MP_ROM_QSTR(MP_QSTR_ATTN_0DB), MP_ROM_INT(ADC_ATTEN_DB_0) },
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{ MP_ROM_QSTR(MP_QSTR_ATTN_2_5DB), MP_ROM_INT(ADC_ATTEN_DB_2_5) },
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{ MP_ROM_QSTR(MP_QSTR_ATTN_6DB), MP_ROM_INT(ADC_ATTEN_DB_6) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_ATTN_11DB), MP_ROM_INT(ADC_ATTEN_DB_11) },
|
||||
|
||||
#if CONFIG_IDF_TARGET_ESP32
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_9BIT), MP_ROM_INT(ADC_WIDTH_9Bit) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_10BIT), MP_ROM_INT(ADC_WIDTH_10Bit) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_11BIT), MP_ROM_INT(ADC_WIDTH_11Bit) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_12BIT), MP_ROM_INT(ADC_WIDTH_12Bit) },
|
||||
#elif CONFIG_IDF_TARGET_ESP32S2
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_13BIT), MP_ROM_INT(ADC_WIDTH_BIT_13) },
|
||||
#elif CONFIG_IDF_TARGET_ESP32S3
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_12BIT), MP_ROM_INT(ADC_WIDTH_BIT_12) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_9BIT), MP_ROM_INT(9) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_10BIT), MP_ROM_INT(10) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_11BIT), MP_ROM_INT(11) },
|
||||
#endif
|
||||
#if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_12BIT), MP_ROM_INT(12) },
|
||||
#endif
|
||||
#if CONFIG_IDF_TARGET_ESP32S2
|
||||
{ MP_ROM_QSTR(MP_QSTR_WIDTH_13BIT), MP_ROM_INT(13) },
|
||||
#endif
|
||||
};
|
||||
|
||||
};
|
||||
STATIC MP_DEFINE_CONST_DICT(madc_locals_dict, madc_locals_dict_table);
|
||||
|
||||
const mp_obj_type_t machine_adc_type = {
|
||||
|
||||
Reference in New Issue
Block a user