From e619097f77edeceb5e8c38dc7e614c7fccd36cbf Mon Sep 17 00:00:00 2001 From: gdisirio Date: Sun, 4 Aug 2013 13:38:53 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6073 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/halnew/src/adc.c | 326 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 326 insertions(+) create mode 100644 os/halnew/src/adc.c (limited to 'os/halnew/src/adc.c') diff --git a/os/halnew/src/adc.c b/os/halnew/src/adc.c new file mode 100644 index 000000000..ccc11574a --- /dev/null +++ b/os/halnew/src/adc.c @@ -0,0 +1,326 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, + 2011,2012,2013 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file adc.c + * @brief ADC Driver code. + * + * @addtogroup ADC + * @{ + */ + +#include "hal.h" + +#if HAL_USE_ADC || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver local definitions. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver exported variables. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local variables and types. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver exported functions. */ +/*===========================================================================*/ + +/** + * @brief ADC Driver initialization. + * @note This function is implicitly invoked by @p halInit(), there is + * no need to explicitly initialize the driver. + * + * @init + */ +void adcInit(void) { + + adc_lld_init(); +} + +/** + * @brief Initializes the standard part of a @p ADCDriver structure. + * + * @param[out] adcp pointer to the @p ADCDriver object + * + * @init + */ +void adcObjectInit(ADCDriver *adcp) { + + adcp->state = ADC_STOP; + adcp->config = NULL; + adcp->samples = NULL; + adcp->depth = 0; + adcp->grpp = NULL; +#if ADC_USE_WAIT + adcp->thread = NULL; +#endif /* ADC_USE_WAIT */ +#if ADC_USE_MUTUAL_EXCLUSION + osalMutexObjectInit(&adcp->mutex); +#endif /* ADC_USE_MUTUAL_EXCLUSION */ +#if defined(ADC_DRIVER_EXT_INIT_HOOK) + ADC_DRIVER_EXT_INIT_HOOK(adcp); +#endif +} + +/** + * @brief Configures and activates the ADC peripheral. + * + * @param[in] adcp pointer to the @p ADCDriver object + * @param[in] config pointer to the @p ADCConfig object. Depending on + * the implementation the value can be @p NULL. + * + * @api + */ +void adcStart(ADCDriver *adcp, const ADCConfig *config) { + + osalDbgCheck(adcp != NULL); + + osalSysLock(); + osalDbgAssert((adcp->state == ADC_STOP) || (adcp->state == ADC_READY), + "adcStart(), #1", "invalid state"); + adcp->config = config; + adc_lld_start(adcp); + adcp->state = ADC_READY; + osalSysUnlock(); +} + +/** + * @brief Deactivates the ADC peripheral. + * + * @param[in] adcp pointer to the @p ADCDriver object + * + * @api + */ +void adcStop(ADCDriver *adcp) { + + osalDbgCheck(adcp != NULL); + + osalSysLock(); + osalDbgAssert((adcp->state == ADC_STOP) || (adcp->state == ADC_READY), + "adcStop(), #1", "invalid state"); + adc_lld_stop(adcp); + adcp->state = ADC_STOP; + osalSysUnlock(); +} + +/** + * @brief Starts an ADC 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] adcp pointer to the @p ADCDriver object + * @param[in] grpp pointer to a @p ADCConversionGroup 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. + * + * @api + */ +void adcStartConversion(ADCDriver *adcp, + const ADCConversionGroup *grpp, + adcsample_t *samples, + size_t depth) { + + osalSysLock(); + adcStartConversionI(adcp, grpp, samples, depth); + osalSysUnlock(); +} + +/** + * @brief Starts an ADC 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] adcp pointer to the @p ADCDriver object + * @param[in] grpp pointer to a @p ADCConversionGroup 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. + * + * @iclass + */ +void adcStartConversionI(ADCDriver *adcp, + const ADCConversionGroup *grpp, + adcsample_t *samples, + size_t depth) { + + osalDbgCheckClassI(); + osalDbgCheck((adcp != NULL) && (grpp != NULL) && (samples != NULL) && + ((depth == 1) || ((depth & 1) == 0))); + osalDbgAssert((adcp->state == ADC_READY) || + (adcp->state == ADC_COMPLETE) || + (adcp->state == ADC_ERROR), + "adcStartConversionI(), #1", "not ready"); + + adcp->samples = samples; + adcp->depth = depth; + adcp->grpp = grpp; + adcp->state = ADC_ACTIVE; + adc_lld_start_conversion(adcp); +} + +/** + * @brief Stops an ongoing conversion. + * @details This function stops the currently ongoing conversion and returns + * the driver in the @p ADC_READY state. If there was no conversion + * being processed then the function does nothing. + * + * @param[in] adcp pointer to the @p ADCDriver object + * + * @api + */ +void adcStopConversion(ADCDriver *adcp) { + + osalDbgCheck(adcp != NULL); + + osalSysLock(); + osalDbgAssert((adcp->state == ADC_READY) || + (adcp->state == ADC_ACTIVE), + "adcStopConversion(), #1", "invalid state"); + if (adcp->state != ADC_READY) { + adc_lld_stop_conversion(adcp); + adcp->grpp = NULL; + adcp->state = ADC_READY; + _adc_reset_s(adcp); + } + osalSysUnlock(); +} + +/** + * @brief Stops an ongoing conversion. + * @details This function stops the currently ongoing conversion and returns + * the driver in the @p ADC_READY state. If there was no conversion + * being processed then the function does nothing. + * + * @param[in] adcp pointer to the @p ADCDriver object + * + * @iclass + */ +void adcStopConversionI(ADCDriver *adcp) { + + osalDbgCheckClassI(); + osalDbgCheck(adcp != NULL); + osalDbgAssert((adcp->state == ADC_READY) || + (adcp->state == ADC_ACTIVE) || + (adcp->state == ADC_COMPLETE), + "adcStopConversionI(), #1", "invalid state"); + + if (adcp->state != ADC_READY) { + adc_lld_stop_conversion(adcp); + adcp->grpp = NULL; + adcp->state = ADC_READY; + _adc_reset_i(adcp); + } +} + +#if ADC_USE_WAIT || defined(__DOXYGEN__) +/** + * @brief Performs an ADC 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] adcp pointer to the @p ADCDriver object + * @param[in] grpp pointer to a @p ADCConversionGroup 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 RDY_OK Conversion finished. + * @retval RDY_RESET The conversion has been stopped using + * @p acdStopConversion() or @p acdStopConversionI(), + * the result buffer may contain incorrect data. + * @retval RDY_TIMEOUT The conversion has been stopped because an hardware + * error. + * + * @api + */ +msg_t adcConvert(ADCDriver *adcp, + const ADCConversionGroup *grpp, + adcsample_t *samples, + size_t depth) { + msg_t msg; + + osalSysLock(); + osalDbgAssert(adcp->thread == NULL, "adcConvert(), #1", "already waiting"); + adcStartConversionI(adcp, grpp, samples, depth); + msg = osalThreadSuspendS(&adcp->thread); + osalSysUnlock(); + return msg; +} +#endif /* ADC_USE_WAIT */ + +#if ADC_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__) +/** + * @brief Gains exclusive access to the ADC peripheral. + * @details This function tries to gain ownership to the ADC bus, if the bus + * is already being used then the invoking thread is queued. + * @pre In order to use this function the option + * @p ADC_USE_MUTUAL_EXCLUSION must be enabled. + * + * @param[in] adcp pointer to the @p ADCDriver object + * + * @api + */ +void adcAcquireBus(ADCDriver *adcp) { + + osalDbgCheck(adcp != NULL); + + osalMutexLock(&adcp->mutex); +} + +/** + * @brief Releases exclusive access to the ADC peripheral. + * @pre In order to use this function the option + * @p ADC_USE_MUTUAL_EXCLUSION must be enabled. + * + * @param[in] adcp pointer to the @p ADCDriver object + * + * @api + */ +void adcReleaseBus(ADCDriver *adcp) { + + osalDbgCheck(adcp != NULL); + + osalMutexUnlock(&adcp->mutex); +} +#endif /* ADC_USE_MUTUAL_EXCLUSION */ + +#endif /* HAL_USE_ADC */ + +/** @} */ -- cgit v1.2.3