114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2017 Nick Moore
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "esp_log.h"
|
|
|
|
#include "driver/gpio.h"
|
|
#include "driver/dac.h"
|
|
|
|
#include "py/runtime.h"
|
|
#include "py/mphal.h"
|
|
#include "modmachine.h"
|
|
|
|
typedef struct _mdac_obj_t {
|
|
mp_obj_base_t base;
|
|
gpio_num_t gpio_id;
|
|
dac_channel_t dac_id;
|
|
} mdac_obj_t;
|
|
|
|
STATIC const mdac_obj_t mdac_obj[] = {
|
|
#if CONFIG_IDF_TARGET_ESP32
|
|
{{&machine_dac_type}, GPIO_NUM_25, DAC_CHANNEL_1},
|
|
{{&machine_dac_type}, GPIO_NUM_26, DAC_CHANNEL_2},
|
|
#else
|
|
{{&machine_dac_type}, GPIO_NUM_17, DAC_CHANNEL_1},
|
|
{{&machine_dac_type}, GPIO_NUM_18, DAC_CHANNEL_2},
|
|
#endif
|
|
};
|
|
|
|
STATIC mp_obj_t mdac_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw,
|
|
const mp_obj_t *args) {
|
|
|
|
mp_arg_check_num(n_args, n_kw, 1, 1, true);
|
|
gpio_num_t pin_id = machine_pin_get_id(args[0]);
|
|
const mdac_obj_t *self = NULL;
|
|
for (int i = 0; i < MP_ARRAY_SIZE(mdac_obj); i++) {
|
|
if (pin_id == mdac_obj[i].gpio_id) {
|
|
self = &mdac_obj[i];
|
|
break;
|
|
}
|
|
}
|
|
if (!self) {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("invalid Pin for DAC"));
|
|
}
|
|
|
|
esp_err_t err = dac_output_enable(self->dac_id);
|
|
if (err == ESP_OK) {
|
|
err = dac_output_voltage(self->dac_id, 0);
|
|
}
|
|
if (err == ESP_OK) {
|
|
return MP_OBJ_FROM_PTR(self);
|
|
}
|
|
mp_raise_ValueError(MP_ERROR_TEXT("parameter error"));
|
|
}
|
|
|
|
STATIC void mdac_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
mdac_obj_t *self = self_in;
|
|
mp_printf(print, "DAC(Pin(%u))", self->gpio_id);
|
|
}
|
|
|
|
STATIC mp_obj_t mdac_write(mp_obj_t self_in, mp_obj_t value_in) {
|
|
mdac_obj_t *self = self_in;
|
|
int value = mp_obj_get_int(value_in);
|
|
if (value < 0 || value > 255) {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("value out of range"));
|
|
}
|
|
|
|
esp_err_t err = dac_output_voltage(self->dac_id, value);
|
|
if (err == ESP_OK) {
|
|
return mp_const_none;
|
|
}
|
|
mp_raise_ValueError(MP_ERROR_TEXT("parameter error"));
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(mdac_write_obj, mdac_write);
|
|
|
|
STATIC const mp_rom_map_elem_t mdac_locals_dict_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mdac_write_obj) },
|
|
};
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(mdac_locals_dict, mdac_locals_dict_table);
|
|
|
|
const mp_obj_type_t machine_dac_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_DAC,
|
|
.print = mdac_print,
|
|
.make_new = mdac_make_new,
|
|
.locals_dict = (mp_obj_t)&mdac_locals_dict,
|
|
};
|