73 lines
2.7 KiB
C
73 lines
2.7 KiB
C
/*
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* This file is part of the Micro Python 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) 2013, 2014 Damien P. George
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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/runtime.h"
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#include "shared-bindings/nativeio/AnalogOut.h"
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#include "asf/sam0/drivers/dac/dac.h"
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#include "samd21_pins.h"
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void common_hal_nativeio_analogout_construct(nativeio_analogout_obj_t* self,
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const mcu_pin_obj_t *pin) {
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if (pin->pin != PIN_PA02) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError,
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"AnalogOut only supported on pin PA02."));
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return;
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}
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struct dac_config config_dac;
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dac_get_config_defaults(&config_dac);
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config_dac.reference = DAC_REFERENCE_AVCC;
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enum status_code status = dac_init(&self->dac_instance, DAC, &config_dac);
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if (status != STATUS_OK) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError,
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"DAC init failed."));
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return;
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}
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struct dac_chan_config config_analogout_chan;
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dac_chan_get_config_defaults(&config_analogout_chan);
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dac_chan_set_config(&self->dac_instance, DAC_CHANNEL_0, &config_analogout_chan);
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dac_chan_enable(&self->dac_instance, DAC_CHANNEL_0);
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dac_enable(&self->dac_instance);
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}
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void common_hal_nativeio_analogout_deinit(nativeio_analogout_obj_t *self) {
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dac_disable(&self->dac_instance);
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dac_chan_disable(&self->dac_instance, DAC_CHANNEL_0);
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reset_pin(PIN_PA02);
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}
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void common_hal_nativeio_analogout_set_value(nativeio_analogout_obj_t *self,
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uint16_t value) {
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// Input is 16 bit but we only support 10 bit so we shift the input.
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dac_chan_write(&self->dac_instance, DAC_CHANNEL_0, value >> 6);
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}
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