133 lines
4.1 KiB
C
133 lines
4.1 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 "common-hal/microcontroller/Pin.h"
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#include STM32_HAL_H
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#ifndef __HAL_RCC_DAC_CLK_ENABLE
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#define __HAL_RCC_DAC_CLK_ENABLE __HAL_RCC_DAC1_CLK_ENABLE
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#endif
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#ifndef __HAL_RCC_DAC_CLK_DISABLE
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#define __HAL_RCC_DAC_CLK_DISABLE __HAL_RCC_DAC1_CLK_DISABLE
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#endif
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// DAC is shared between both channels.
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#if HAS_DAC
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DAC_HandleTypeDef handle;
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#endif
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STATIC bool dac_on[2];
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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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#if !(HAS_DAC)
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mp_raise_ValueError(translate("No DAC on chip"));
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#else
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if (pin == &pin_PA04) {
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self->channel = DAC_CHANNEL_1;
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self->dac_index = 0;
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} else if (pin == &pin_PA05) {
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self->channel = DAC_CHANNEL_2;
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self->dac_index = 1;
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} else {
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raise_ValueError_invalid_pin();
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}
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// Only init if the shared DAC is empty or reset
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if (handle.Instance == NULL || handle.State == HAL_DAC_STATE_RESET) {
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__HAL_RCC_DAC_CLK_ENABLE();
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handle.Instance = DAC;
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if (HAL_DAC_Init(&handle) != HAL_OK) {
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mp_raise_ValueError(translate("DAC Device Init Error"));
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}
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}
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// init channel specific pin
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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GPIO_InitStruct.Pin = pin_mask(pin->number);
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GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(pin_port(pin->port), &GPIO_InitStruct);
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self->ch_handle.DAC_Trigger = DAC_TRIGGER_NONE;
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self->ch_handle.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
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if (HAL_DAC_ConfigChannel(&handle, &self->ch_handle, self->channel) != HAL_OK) {
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mp_raise_ValueError(translate("DAC Channel Init Error"));
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}
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dac_on[self->dac_index] = true;
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self->pin = pin;
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common_hal_mcu_pin_claim(pin);
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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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return !dac_on[self->dac_index];
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}
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void common_hal_analogio_analogout_deinit(analogio_analogout_obj_t *self) {
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#if HAS_DAC
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reset_pin_number(self->pin->port, self->pin->number);
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self->pin = NULL;
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dac_on[self->dac_index] = false;
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// turn off the DAC if both channels are off
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if (dac_on[0] == false && dac_on[1] == false) {
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__HAL_RCC_DAC_CLK_DISABLE();
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HAL_DAC_DeInit(&handle);
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}
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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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#if HAS_DAC
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HAL_DAC_SetValue(&handle, self->channel, DAC_ALIGN_12B_R, value >> 4);
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HAL_DAC_Start(&handle, self->channel);
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#endif
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}
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void analogout_reset(void) {
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#if HAS_DAC
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__HAL_RCC_DAC_CLK_DISABLE();
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HAL_DAC_DeInit(&handle);
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#endif
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}
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