| /* |
| * 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 "py/runtime.h" |
| #include "py/mphal.h" |
| #include "modmachine.h" |
| |
| #if MICROPY_PY_MACHINE_DAC |
| |
| #include "driver/gpio.h" |
| #include "driver/dac_oneshot.h" |
| |
| typedef struct _mdac_obj_t { |
| mp_obj_base_t base; |
| gpio_num_t gpio_id; |
| dac_channel_t dac_id; |
| dac_oneshot_handle_t dac_oneshot_handle; |
| } mdac_obj_t; |
| |
| static mdac_obj_t mdac_obj[] = { |
| #if CONFIG_IDF_TARGET_ESP32 |
| {{&machine_dac_type}, GPIO_NUM_25, DAC_CHAN_0}, |
| {{&machine_dac_type}, GPIO_NUM_26, DAC_CHAN_1}, |
| #else |
| {{&machine_dac_type}, GPIO_NUM_17, DAC_CHAN_0}, |
| {{&machine_dac_type}, GPIO_NUM_18, DAC_CHAN_1}, |
| #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")); |
| } |
| |
| dac_oneshot_config_t dac_oneshot_config = {.chan_id = self->dac_id}; |
| check_esp_err(dac_oneshot_new_channel(&dac_oneshot_config, (dac_oneshot_handle_t *)&self->dac_oneshot_handle)); |
| check_esp_err(dac_oneshot_output_voltage(self->dac_oneshot_handle, 0)); |
| return MP_OBJ_FROM_PTR(self); |
| } |
| |
| 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")); |
| } |
| |
| check_esp_err(dac_oneshot_output_voltage(self->dac_oneshot_handle, value)); |
| return mp_const_none; |
| } |
| 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); |
| |
| MP_DEFINE_CONST_OBJ_TYPE( |
| machine_dac_type, |
| MP_QSTR_DAC, |
| MP_TYPE_FLAG_NONE, |
| make_new, mdac_make_new, |
| print, mdac_print, |
| locals_dict, &mdac_locals_dict |
| ); |
| |
| #endif // MICROPY_PY_MACHINE_DAC |