From 4edc5aeca7251e69dfa772dfdd5b2e012375a809 Mon Sep 17 00:00:00 2001 From: Giovanni Di Sirio Date: Wed, 23 Mar 2016 12:36:05 +0000 Subject: Mass renaming of HAL files. git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9151 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/src/hal_dac.c | 349 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 349 insertions(+) create mode 100644 os/hal/src/hal_dac.c (limited to 'os/hal/src/hal_dac.c') diff --git a/os/hal/src/hal_dac.c b/os/hal/src/hal_dac.c new file mode 100644 index 000000000..0feb4308f --- /dev/null +++ b/os/hal/src/hal_dac.c @@ -0,0 +1,349 @@ +/* + 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.c + * @brief DAC Driver code. + * + * @addtogroup DAC + * @{ + */ + +#include "hal.h" + +#if (HAL_USE_DAC == TRUE) || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver local definitions. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver exported variables. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local variables. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver exported functions. */ +/*===========================================================================*/ + +/** + * @brief DAC Driver initialization. + * @note This function is implicitly invoked by @p halInit(), there is + * no need to explicitly initialize the driver. + * + * @init + */ +void dacInit(void) { + + dac_lld_init(); +} + +/** + * @brief Initializes the standard part of a @p DACDriver structure. + * + * @param[out] dacp pointer to the @p DACDriver object + * + * @init + */ +void dacObjectInit(DACDriver *dacp) { + + dacp->state = DAC_STOP; + dacp->config = NULL; +#if DAC_USE_WAIT + dacp->thread = NULL; +#endif +#if DAC_USE_MUTUAL_EXCLUSION + osalMutexObjectInit(&dacp->mutex); +#endif +#if defined(DAC_DRIVER_EXT_INIT_HOOK) + DAC_DRIVER_EXT_INIT_HOOK(dacp); +#endif +} + +/** + * @brief Configures and activates the DAC peripheral. + * + * @param[in] dacp pointer to the @p DACDriver object + * @param[in] config pointer to the @p DACConfig object, it can be + * @p NULL if the low level driver implementation + * supports a default configuration + * + * @api + */ +void dacStart(DACDriver *dacp, const DACConfig *config) { + + osalDbgCheck(dacp != NULL); + + osalSysLock(); + + osalDbgAssert((dacp->state == DAC_STOP) || (dacp->state == DAC_READY), + "invalid state"); + + dacp->config = config; + dac_lld_start(dacp); + dacp->state = DAC_READY; + + osalSysUnlock(); +} + +/** + * @brief Deactivates the DAC peripheral. + * @note Deactivating the peripheral also enforces a release of the slave + * select line. + * + * @param[in] dacp pointer to the @p DACDriver object + * + * @api + */ +void dacStop(DACDriver *dacp) { + + osalDbgCheck(dacp != NULL); + + osalSysLock(); + + osalDbgAssert((dacp->state == DAC_STOP) || (dacp->state == DAC_READY), + "invalid state"); + + dac_lld_stop(dacp); + dacp->state = DAC_STOP; + + osalSysUnlock(); +} + +/** + * @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 + * + * @xclass + */ +void dacPutChannelX(DACDriver *dacp, dacchannel_t channel, dacsample_t sample) { + + osalDbgCheck(channel < DAC_MAX_CHANNELS); + osalDbgAssert(dacp->state == DAC_READY, "invalid state"); + + dac_lld_put_channel(dacp, channel, sample); +} + +/** + * @brief Starts a DAC conversion. + * @details Starts an asynchronous conversion operation. + * @note The buffer is organized as a matrix of M*N elements where M is the + * channels number configured into the conversion group and N is the + * buffer depth. The samples are sequentially written into the buffer + * with no gaps. + * + * @param[in] dacp pointer to the @p DACDriver object + * @param[in] grpp pointer to a @p DACConversionGroup object + * @param[in] samples pointer to the samples buffer + * @param[in] depth buffer depth (matrix rows number). The buffer depth + * must be one or an even number. + * + * @api + */ +void dacStartConversion(DACDriver *dacp, + const DACConversionGroup *grpp, + const dacsample_t *samples, + size_t depth) { + + osalSysLock(); + dacStartConversionI(dacp, grpp, samples, depth); + osalSysUnlock(); +} + +/** + * @brief Starts a DAC conversion. + * @details Starts an asynchronous conversion operation. + * @post The callbacks associated to the conversion group will be invoked + * on buffer fill and error events. + * @note The buffer is organized as a matrix of M*N elements where M is the + * channels number configured into the conversion group and N is the + * buffer depth. The samples are sequentially written into the buffer + * with no gaps. + * + * @param[in] dacp pointer to the @p DACDriver object + * @param[in] grpp pointer to a @p DACConversionGroup object + * @param[in] samples pointer to the samples buffer + * @param[in] depth buffer depth (matrix rows number). The buffer depth + * must be one or an even number. + * + * @iclass + */ +void dacStartConversionI(DACDriver *dacp, + const DACConversionGroup *grpp, + const dacsample_t *samples, + size_t depth) { + + osalDbgCheckClassI(); + osalDbgCheck((dacp != NULL) && (grpp != NULL) && (samples != NULL) && + ((depth == 1) || ((depth & 1) == 0))); + osalDbgAssert((dacp->state == DAC_READY) || + (dacp->state == DAC_COMPLETE) || + (dacp->state == DAC_ERROR), + "not ready"); + + dacp->samples = samples; + dacp->depth = depth; + dacp->grpp = grpp; + dacp->state = DAC_ACTIVE; + dac_lld_start_conversion(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 + * + * @api + */ +void dacStopConversion(DACDriver *dacp) { + + osalDbgCheck(dacp != NULL); + + osalSysLock(); + + osalDbgAssert((dacp->state == DAC_READY) || + (dacp->state == DAC_ACTIVE), + "invalid state"); + + if (dacp->state != DAC_READY) { + dac_lld_stop_conversion(dacp); + dacp->grpp = NULL; + dacp->state = DAC_READY; + _dac_reset_s(dacp); + } + + osalSysUnlock(); +} + +/** + * @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 dacStopConversionI(DACDriver *dacp) { + + osalDbgCheckClassI(); + osalDbgCheck(dacp != NULL); + osalDbgAssert((dacp->state == DAC_READY) || + (dacp->state == DAC_ACTIVE) || + (dacp->state == DAC_COMPLETE), + "invalid state"); + + if (dacp->state != DAC_READY) { + dac_lld_stop_conversion(dacp); + dacp->grpp = NULL; + dacp->state = DAC_READY; + _dac_reset_i(dacp); + } +} + +#if (DAC_USE_WAIT == TRUE) || defined(__DOXYGEN__) +/** + * @brief Performs a DAC conversion. + * @details Performs a synchronous conversion operation. + * @note The buffer is organized as a matrix of M*N elements where M is the + * channels number configured into the conversion group and N is the + * buffer depth. The samples are sequentially written into the buffer + * with no gaps. + * + * @param[in] dacp pointer to the @p DACDriver object + * @param[in] grpp pointer to a @p DACConversionGroup object + * @param[out] samples pointer to the samples buffer + * @param[in] depth buffer depth (matrix rows number). The buffer depth + * must be one or an even number. + * @return The operation result. + * @retval MSG_OK Conversion finished. + * @retval MSG_RESET The conversion has been stopped using + * @p acdStopConversion() or @p acdStopConversionI(), + * the result buffer may contain incorrect data. + * @retval MSG_TIMEOUT The conversion has been stopped because an hardware + * error. + * + * @api + */ +msg_t dacConvert(DACDriver *dacp, + const DACConversionGroup *grpp, + const dacsample_t *samples, + size_t depth) { + msg_t msg; + + osalSysLock(); + + dacStartConversionI(dacp, grpp, samples, depth); + msg = osalThreadSuspendS(&dacp->thread); + + osalSysUnlock(); + return msg; +} +#endif /* DAC_USE_WAIT == TRUE */ + +#if (DAC_USE_MUTUAL_EXCLUSION == TRUE) || defined(__DOXYGEN__) +/** + * @brief Gains exclusive access to the DAC bus. + * @details This function tries to gain ownership to the DAC bus, if the bus + * is already being used then the invoking thread is queued. + * @pre In order to use this function the option @p DAC_USE_MUTUAL_EXCLUSION + * must be enabled. + * + * @param[in] dacp pointer to the @p DACDriver object + * + * @api + */ +void dacAcquireBus(DACDriver *dacp) { + + osalDbgCheck(dacp != NULL); + + osalMutexLock(&dacp->mutex); +} + +/** + * @brief Releases exclusive access to the DAC bus. + * @pre In order to use this function the option @p DAC_USE_MUTUAL_EXCLUSION + * must be enabled. + * + * @param[in] dacp pointer to the @p DACDriver object + * + * @api + */ +void dacReleaseBus(DACDriver *dacp) { + + osalDbgCheck(dacp != NULL); + + osalMutexUnlock(&dacp->mutex); +} +#endif /* DAC_USE_MUTUAL_EXCLUSION == TRUE */ + +#endif /* HAL_USE_DAC == TRUE */ + +/** @} */ -- cgit v1.2.3