104 lines
3.3 KiB
C
104 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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* SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
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* Copyright (c) 2019, Lucian Copeland for Adafruit Industries
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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 <stdint.h>
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#include <string.h>
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#include "py/mperrno.h"
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#include "py/runtime.h"
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#include "shared-bindings/analogio/AnalogOut.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "supervisor/shared/translate/translate.h"
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#ifdef SOC_DAC_SUPPORTED
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#include "driver/dac_oneshot.h"
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#if defined(CONFIG_IDF_TARGET_ESP32)
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#define pin_CHANNEL_0 pin_GPIO25
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#define pin_CHANNEL_1 pin_GPIO26
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#elif defined(CONFIG_IDF_TARGET_ESP32S2)
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#define pin_CHANNEL_0 pin_GPIO17
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#define pin_CHANNEL_1 pin_GPIO18
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#endif
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static dac_oneshot_handle_t _active_handles[SOC_DAC_CHAN_NUM];
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#endif
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void common_hal_analogio_analogout_construct(analogio_analogout_obj_t *self,
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const mcu_pin_obj_t *pin) {
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#ifdef SOC_DAC_SUPPORTED
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if (pin == &pin_CHANNEL_0) {
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self->channel = DAC_CHAN_0;
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} else if (pin == &pin_CHANNEL_1) {
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self->channel = DAC_CHAN_1;
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} else {
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raise_ValueError_invalid_pin();
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}
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dac_oneshot_config_t config = {
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.chan_id = self->channel
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};
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dac_oneshot_new_channel(&config, &self->handle);
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_active_handles[self->channel] = self->handle;
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#else
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mp_raise_NotImplementedError(NULL);
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#endif
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}
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bool common_hal_analogio_analogout_deinited(analogio_analogout_obj_t *self) {
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#ifdef SOC_DAC_SUPPORTED
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return self->handle == NULL;
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#else
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return false;
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#endif
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}
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void common_hal_analogio_analogout_deinit(analogio_analogout_obj_t *self) {
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#ifdef SOC_DAC_SUPPORTED
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dac_oneshot_del_channel(self->handle);
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self->handle = NULL;
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_active_handles[self->channel] = NULL;
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#endif
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}
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void common_hal_analogio_analogout_set_value(analogio_analogout_obj_t *self,
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uint16_t value) {
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#ifdef SOC_DAC_SUPPORTED
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uint8_t dac_value = (value * 255) / 65535;
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dac_oneshot_output_voltage(self->handle, dac_value);
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#endif
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}
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void analogout_reset(void) {
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#ifdef SOC_DAC_SUPPORTED
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for (uint8_t c = 0; c < SOC_DAC_CHAN_NUM; c++) {
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dac_oneshot_del_channel(_active_handles[c]);
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_active_handles[c] = NULL;
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}
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#endif
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}
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