98 lines
3.3 KiB
C
98 lines
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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*
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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 <stdio.h>
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#include "esp_log.h"
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#include "driver/gpio.h"
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#include "driver/dac.h"
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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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typedef struct _mdac_obj_t {
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mp_obj_base_t base;
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gpio_num_t gpio_id;
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dac_channel_t dac_id;
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} mdac_obj_t;
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STATIC const mdac_obj_t mdac_obj[] = {
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{{&machine_dac_type}, GPIO_NUM_25, DAC_CHANNEL_1},
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{{&machine_dac_type}, GPIO_NUM_26, DAC_CHANNEL_2},
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};
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STATIC mp_obj_t mdac_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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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 mdac_obj_t *self = NULL;
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for (int i = 0; i < MP_ARRAY_SIZE(mdac_obj); i++) {
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if (pin_id == mdac_obj[i].gpio_id) { self = &mdac_obj[i]; break; }
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}
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if (!self) mp_raise_ValueError("invalid Pin for DAC");
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esp_err_t err = dac_output_enable(self->dac_id);
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if (err == ESP_OK) {
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err = dac_output_voltage(self->dac_id, 0);
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}
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if (err == ESP_OK) return MP_OBJ_FROM_PTR(self);
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mp_raise_ValueError("Parameter Error");
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}
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STATIC void mdac_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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mdac_obj_t *self = self_in;
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mp_printf(print, "DAC(Pin(%u))", self->gpio_id);
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}
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STATIC mp_obj_t mdac_write(mp_obj_t self_in, mp_obj_t value_in) {
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mdac_obj_t *self = self_in;
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int value = mp_obj_get_int(value_in);
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if (value < 0 || value > 255) mp_raise_ValueError("Value out of range");
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esp_err_t err = dac_output_voltage(self->dac_id, value);
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if (err == ESP_OK) return mp_const_none;
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mp_raise_ValueError("Parameter Error");
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}
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MP_DEFINE_CONST_FUN_OBJ_2(mdac_write_obj, mdac_write);
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STATIC const mp_rom_map_elem_t mdac_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mdac_write_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(mdac_locals_dict, mdac_locals_dict_table);
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const mp_obj_type_t machine_dac_type = {
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{ &mp_type_type },
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.name = MP_QSTR_DAC,
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.print = mdac_print,
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.make_new = mdac_make_new,
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.locals_dict = (mp_obj_t)&mdac_locals_dict,
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};
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