125 lines
4.0 KiB
C
125 lines
4.0 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
|
|
* Copyright (c) 2019, Lucian Copeland for Adafruit Industries
|
|
*
|
|
* 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 <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include "py/mperrno.h"
|
|
#include "py/runtime.h"
|
|
|
|
#include "shared-bindings/analogio/AnalogOut.h"
|
|
#include "shared-bindings/microcontroller/Pin.h"
|
|
#include "supervisor/shared/translate.h"
|
|
|
|
#include "common-hal/microcontroller/Pin.h"
|
|
|
|
#include "stm32f4xx_hal.h"
|
|
|
|
//DAC is shared between both channels.
|
|
#if HAS_DAC
|
|
DAC_HandleTypeDef handle;
|
|
#endif
|
|
|
|
STATIC bool dac_on[2];
|
|
|
|
void common_hal_analogio_analogout_construct(analogio_analogout_obj_t* self,
|
|
const mcu_pin_obj_t *pin) {
|
|
#if !(HAS_DAC)
|
|
mp_raise_ValueError(translate("No DAC on chip"));
|
|
#else
|
|
if (pin == &pin_PA04) {
|
|
self->channel = DAC_CHANNEL_1;
|
|
self->dac_index = 0;
|
|
} else if (pin == &pin_PA05) {
|
|
self->channel = DAC_CHANNEL_2;
|
|
self->dac_index = 1;
|
|
} else {
|
|
mp_raise_ValueError(translate("Invalid DAC pin supplied"));
|
|
}
|
|
|
|
//Only init if the shared DAC is empty or reset
|
|
if (handle.Instance == NULL || handle.State == HAL_DAC_STATE_RESET) {
|
|
__HAL_RCC_DAC_CLK_ENABLE();
|
|
handle.Instance = DAC;
|
|
if (HAL_DAC_Init(&handle) != HAL_OK)
|
|
{
|
|
mp_raise_ValueError(translate("DAC Device Init Error"));
|
|
}
|
|
}
|
|
|
|
//init channel specific pin
|
|
GPIO_InitTypeDef GPIO_InitStruct = {0};
|
|
GPIO_InitStruct.Pin = pin_mask(pin->number);
|
|
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
|
|
GPIO_InitStruct.Pull = GPIO_NOPULL;
|
|
HAL_GPIO_Init(pin_port(pin->port), &GPIO_InitStruct);
|
|
|
|
self->ch_handle.DAC_Trigger = DAC_TRIGGER_NONE;
|
|
self->ch_handle.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
|
|
if (HAL_DAC_ConfigChannel(&handle, &self->ch_handle, self->channel) != HAL_OK) {
|
|
mp_raise_ValueError(translate("DAC Channel Init Error"));
|
|
}
|
|
|
|
dac_on[self->dac_index] = true;
|
|
self->pin = pin;
|
|
common_hal_mcu_pin_claim(pin);
|
|
#endif
|
|
}
|
|
|
|
bool common_hal_analogio_analogout_deinited(analogio_analogout_obj_t *self) {
|
|
return !dac_on[self->dac_index];
|
|
}
|
|
|
|
void common_hal_analogio_analogout_deinit(analogio_analogout_obj_t *self) {
|
|
#if HAS_DAC
|
|
reset_pin_number(self->pin->port,self->pin->number);
|
|
self->pin = NULL;
|
|
dac_on[self->dac_index] = false;
|
|
|
|
//turn off the DAC if both channels are off
|
|
if(dac_on[0] == false && dac_on[1] == false) {
|
|
__HAL_RCC_DAC_CLK_DISABLE();
|
|
HAL_DAC_DeInit(&handle);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void common_hal_analogio_analogout_set_value(analogio_analogout_obj_t *self,
|
|
uint16_t value) {
|
|
#if HAS_DAC
|
|
HAL_DAC_SetValue(&handle, self->channel, DAC_ALIGN_12B_R, value >> 4);
|
|
HAL_DAC_Start(&handle, self->channel);
|
|
#endif
|
|
}
|
|
|
|
void analogout_reset(void) {
|
|
#if HAS_DAC
|
|
__HAL_RCC_DAC_CLK_DISABLE();
|
|
HAL_DAC_DeInit(&handle);
|
|
#endif
|
|
}
|