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168 lines
5.0 KiB
C
168 lines
5.0 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file hal_dac_lld.c
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* @brief PLATFORM DAC subsystem low level driver source.
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*
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* @addtogroup DAC
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* @{
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*/
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#include "hal.h"
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#if (HAL_USE_DAC == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/** @brief DAC1 driver identifier.*/
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#if (PLATFORM_DAC_USE_DAC1 == TRUE) || defined(__DOXYGEN__)
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DACDriver DACD1;
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#endif
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/*===========================================================================*/
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/* Driver local variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level DAC driver initialization.
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*
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* @notapi
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*/
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void dac_lld_init(void) {
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#if PLATFORM_DAC_USE_DAC1 == TRUE
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dacObjectInit(&DACD1);
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#endif
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}
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/**
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* @brief Configures and activates the DAC peripheral.
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*
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* @param[in] dacp pointer to the @p DACDriver object
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*
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* @notapi
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*/
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void dac_lld_start(DACDriver *dacp) {
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/* If the driver is in DAC_STOP state then a full initialization is
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required.*/
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if (dacp->state == DAC_STOP) {
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/* Enabling the clock source.*/
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#if PLATFORM_DAC_USE_DAC1 == TRUE
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if (&DACD1 == dacp) {
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}
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#endif
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}
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}
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/**
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* @brief Deactivates the DAC peripheral.
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*
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* @param[in] dacp pointer to the @p DACDriver object
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*
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* @notapi
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*/
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void dac_lld_stop(DACDriver *dacp) {
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/* If in ready state then disables the DAC clock.*/
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if (dacp->state == DAC_READY) {
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#if PLATFORM_DAC_USE_DAC1 == TRUE
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if (&DACD1 == dacp) {
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}
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#endif
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}
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}
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/**
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* @brief Outputs a value directly on a DAC channel.
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*
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* @param[in] dacp pointer to the @p DACDriver object
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* @param[in] channel DAC channel number
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* @param[in] sample value to be output
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*
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* @api
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*/
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void dac_lld_put_channel(DACDriver *dacp,
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dacchannel_t channel,
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dacsample_t sample) {
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(void)dacp;
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(void)channel;
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(void)sample;
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}
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/**
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* @brief Starts a DAC conversion.
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* @details Starts an asynchronous conversion operation.
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* @note In @p DAC_DHRM_8BIT_RIGHT mode the parameters passed to the
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* callback are wrong because two samples are packed in a single
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* dacsample_t element. This will not be corrected, do not rely
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* on those parameters.
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* @note In @p DAC_DHRM_8BIT_RIGHT_DUAL mode two samples are treated
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* as a single 16 bits sample and packed into a single dacsample_t
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* element. The num_channels must be set to one in the group
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* conversion configuration structure.
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*
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* @param[in] dacp pointer to the @p DACDriver object
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*
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* @notapi
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*/
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void dac_lld_start_conversion(DACDriver *dacp) {
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(void)dacp;
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}
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/**
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* @brief Stops an ongoing conversion.
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* @details This function stops the currently ongoing conversion and returns
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* the driver in the @p DAC_READY state. If there was no conversion
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* being processed then the function does nothing.
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*
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* @param[in] dacp pointer to the @p DACDriver object
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*
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* @iclass
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*/
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void dac_lld_stop_conversion(DACDriver *dacp) {
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(void)dacp;
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}
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#endif /* HAL_USE_DAC == TRUE */
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/** @} */
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