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/*
ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file dac_lld.c
* @brief PLATFORM DAC subsystem low level driver source.
*
* @addtogroup DAC
* @{
*/
#include "hal.h"
#if (HAL_USE_DAC == TRUE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/** @brief DAC1 driver identifier.*/
#if (PLATFORM_DAC_USE_DAC1 == TRUE) || defined(__DOXYGEN__)
DACDriver DACD1;
#endif
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level DAC driver initialization.
*
* @notapi
*/
void dac_lld_init(void) {
#if PLATFORM_DAC_USE_DAC1 == TRUE
dacObjectInit(&DACD1);
#endif
}
/**
* @brief Configures and activates the DAC peripheral.
*
* @param[in] dacp pointer to the @p DACDriver object
*
* @notapi
*/
void dac_lld_start(DACDriver *dacp) {
/* If the driver is in DAC_STOP state then a full initialization is
required.*/
if (dacp->state == DAC_STOP) {
/* Enabling the clock source.*/
#if PLATFORM_DAC_USE_DAC1 == TRUE
if (&DACD1 == dacp) {
}
#endif
}
}
/**
* @brief Deactivates the DAC peripheral.
*
* @param[in] dacp pointer to the @p DACDriver object
*
* @notapi
*/
void dac_lld_stop(DACDriver *dacp) {
/* If in ready state then disables the DAC clock.*/
if (dacp->state == DAC_READY) {
/* Disabling DAC.*/
dacp->params->dac->CR &= dacp->params->regmask;
#if PLATFORM_DAC_USE_DAC1 == TRUE
if (&DACD1 == dacp) {
}
#endif
}
}
/**
* @brief Outputs a value directly on a DAC channel.
*
* @param[in] dacp pointer to the @p DACDriver object
* @param[in] channel DAC channel number
* @param[in] sample value to be output
*
* @api
*/
void dac_lld_put_channel(DACDriver *dacp,
dacchannel_t channel,
dacsample_t sample) {
(void)dacp;
(void)channel;
(void)sample;
}
/**
* @brief Starts a DAC conversion.
* @details Starts an asynchronous conversion operation.
* @note In @p DAC_DHRM_8BIT_RIGHT mode the parameters passed to the
* callback are wrong because two samples are packed in a single
* dacsample_t element. This will not be corrected, do not rely
* on those parameters.
* @note In @p DAC_DHRM_8BIT_RIGHT_DUAL mode two samples are treated
* as a single 16 bits sample and packed into a single dacsample_t
* element. The num_channels must be set to one in the group
* conversion configuration structure.
*
* @param[in] dacp pointer to the @p DACDriver object
*
* @notapi
*/
void dac_lld_start_conversion(DACDriver *dacp) {
(void)dacp;
}
/**
* @brief Stops an ongoing conversion.
* @details This function stops the currently ongoing conversion and returns
* the driver in the @p DAC_READY state. If there was no conversion
* being processed then the function does nothing.
*
* @param[in] dacp pointer to the @p DACDriver object
*
* @iclass
*/
void dac_lld_stop_conversion(DACDriver *dacp) {
(void)dacp;
}
#endif /* HAL_USE_DAC == TRUE */
/** @} */
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