mirror of https://github.com/ARMmbed/mbed-os.git
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/* mbed Microcontroller Library
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
******************************************************************************
|
|
*
|
|
* Copyright (c) 2015-2020 STMicroelectronics.
|
|
* All rights reserved.
|
|
*
|
|
* This software component is licensed by ST under BSD 3-Clause license,
|
|
* the "License"; You may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at:
|
|
* opensource.org/licenses/BSD-3-Clause
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
|
|
#include "mbed_assert.h"
|
|
#include "analogout_api.h"
|
|
|
|
#if DEVICE_ANALOGOUT
|
|
|
|
#include "cmsis.h"
|
|
#include "pinmap.h"
|
|
#include "mbed_error.h"
|
|
#include "PeripheralPins.h"
|
|
|
|
void analogout_init(dac_t *obj, PinName pin)
|
|
{
|
|
DAC_ChannelConfTypeDef sConfig = {0};
|
|
|
|
// Get the peripheral name from the pin and assign it to the object
|
|
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
|
|
MBED_ASSERT(obj->dac != (DACName)NC);
|
|
|
|
// Get the pin function and assign the used channel to the object
|
|
uint32_t function = pinmap_function(pin, PinMap_DAC);
|
|
MBED_ASSERT(function != (uint32_t)NC);
|
|
|
|
switch (STM_PIN_CHANNEL(function)) {
|
|
case 1:
|
|
obj->channel = DAC_CHANNEL_1;
|
|
break;
|
|
#if defined(DAC_CHANNEL_2)
|
|
case 2:
|
|
obj->channel = DAC_CHANNEL_2;
|
|
break;
|
|
#endif
|
|
default:
|
|
error("Unknown DAC channel");
|
|
break;
|
|
}
|
|
|
|
// Configure GPIO
|
|
pinmap_pinout(pin, PinMap_DAC);
|
|
|
|
// Save the pin for future use
|
|
obj->pin = pin;
|
|
|
|
// Enable DAC clock
|
|
__HAL_RCC_DAC1_CLK_ENABLE();
|
|
|
|
// Configure DAC
|
|
obj->handle.Instance = (DAC_TypeDef *)(obj->dac);
|
|
obj->handle.State = HAL_DAC_STATE_RESET;
|
|
|
|
if (HAL_DAC_Init(&obj->handle) != HAL_OK) {
|
|
error("HAL_DAC_Init failed");
|
|
}
|
|
|
|
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
|
|
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
|
|
|
|
if (HAL_DAC_ConfigChannel(&obj->handle, &sConfig, obj->channel) != HAL_OK) {
|
|
error("HAL_DAC_ConfigChannel failed");
|
|
}
|
|
|
|
analogout_write_u16(obj, 0);
|
|
}
|
|
|
|
void analogout_free(dac_t *obj)
|
|
{
|
|
// Reset DAC and disable clock
|
|
__HAL_RCC_DAC1_FORCE_RESET();
|
|
__HAL_RCC_DAC1_RELEASE_RESET();
|
|
__HAL_RCC_DAC1_CLK_DISABLE();
|
|
|
|
// Configure GPIO
|
|
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
|
|
}
|
|
|
|
const PinMap *analogout_pinmap()
|
|
{
|
|
return PinMap_DAC;
|
|
}
|
|
|
|
#endif // DEVICE_ANALOGOUT
|