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https://github.com/portapack-mayhem/mayhem-firmware.git
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ChibiOS 2.6.8, until I can figure out where to get it from git.
This commit is contained in:
Jared Boone
Executable
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012,2013 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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---
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A special exception to the GPL can be applied should you wish to distribute
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a combined work that includes ChibiOS/RT, without being obliged to provide
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the source code for any proprietary components. See the file exception.txt
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for full details of how and when the exception can be applied.
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*/
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/**
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* @file adc.c
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* @brief ADC Driver code.
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*
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* @addtogroup ADC
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#if HAL_USE_ADC || 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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/*===========================================================================*/
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/* Driver local variables and types. */
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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 exported functions. */
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/*===========================================================================*/
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/**
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* @brief ADC Driver initialization.
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* @note This function is implicitly invoked by @p halInit(), there is
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* no need to explicitly initialize the driver.
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*
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* @init
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*/
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void adcInit(void) {
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adc_lld_init();
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}
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/**
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* @brief Initializes the standard part of a @p ADCDriver structure.
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*
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* @param[out] adcp pointer to the @p ADCDriver object
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*
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* @init
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*/
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void adcObjectInit(ADCDriver *adcp) {
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adcp->state = ADC_STOP;
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adcp->config = NULL;
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adcp->samples = NULL;
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adcp->depth = 0;
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adcp->grpp = NULL;
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#if ADC_USE_WAIT
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adcp->thread = NULL;
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#endif /* ADC_USE_WAIT */
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#if ADC_USE_MUTUAL_EXCLUSION
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#if CH_USE_MUTEXES
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chMtxInit(&adcp->mutex);
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#else
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chSemInit(&adcp->semaphore, 1);
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#endif
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#endif /* ADC_USE_MUTUAL_EXCLUSION */
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#if defined(ADC_DRIVER_EXT_INIT_HOOK)
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ADC_DRIVER_EXT_INIT_HOOK(adcp);
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#endif
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}
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/**
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* @brief Configures and activates the ADC peripheral.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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* @param[in] config pointer to the @p ADCConfig object. Depending on
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* the implementation the value can be @p NULL.
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*
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* @api
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*/
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void adcStart(ADCDriver *adcp, const ADCConfig *config) {
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chDbgCheck(adcp != NULL, "adcStart");
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chSysLock();
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chDbgAssert((adcp->state == ADC_STOP) || (adcp->state == ADC_READY),
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"adcStart(), #1", "invalid state");
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adcp->config = config;
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adc_lld_start(adcp);
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adcp->state = ADC_READY;
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chSysUnlock();
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}
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/**
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* @brief Deactivates the ADC peripheral.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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*
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* @api
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*/
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void adcStop(ADCDriver *adcp) {
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chDbgCheck(adcp != NULL, "adcStop");
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chSysLock();
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chDbgAssert((adcp->state == ADC_STOP) || (adcp->state == ADC_READY),
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"adcStop(), #1", "invalid state");
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adc_lld_stop(adcp);
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adcp->state = ADC_STOP;
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chSysUnlock();
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}
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/**
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* @brief Starts an ADC conversion.
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* @details Starts an asynchronous conversion operation.
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* @note The buffer is organized as a matrix of M*N elements where M is the
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* channels number configured into the conversion group and N is the
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* buffer depth. The samples are sequentially written into the buffer
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* with no gaps.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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* @param[in] grpp pointer to a @p ADCConversionGroup object
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* @param[out] samples pointer to the samples buffer
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* @param[in] depth buffer depth (matrix rows number). The buffer depth
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* must be one or an even number.
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*
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* @api
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*/
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void adcStartConversion(ADCDriver *adcp,
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const ADCConversionGroup *grpp,
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adcsample_t *samples,
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size_t depth) {
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chSysLock();
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adcStartConversionI(adcp, grpp, samples, depth);
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chSysUnlock();
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}
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/**
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* @brief Starts an ADC conversion.
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* @details Starts an asynchronous conversion operation.
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* @post The callbacks associated to the conversion group will be invoked
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* on buffer fill and error events.
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* @note The buffer is organized as a matrix of M*N elements where M is the
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* channels number configured into the conversion group and N is the
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* buffer depth. The samples are sequentially written into the buffer
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* with no gaps.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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* @param[in] grpp pointer to a @p ADCConversionGroup object
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* @param[out] samples pointer to the samples buffer
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* @param[in] depth buffer depth (matrix rows number). The buffer depth
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* must be one or an even number.
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*
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* @iclass
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*/
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void adcStartConversionI(ADCDriver *adcp,
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const ADCConversionGroup *grpp,
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adcsample_t *samples,
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size_t depth) {
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chDbgCheckClassI();
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chDbgCheck((adcp != NULL) && (grpp != NULL) && (samples != NULL) &&
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((depth == 1) || ((depth & 1) == 0)),
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"adcStartConversionI");
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chDbgAssert((adcp->state == ADC_READY) ||
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(adcp->state == ADC_COMPLETE) ||
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(adcp->state == ADC_ERROR),
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"adcStartConversionI(), #1", "not ready");
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adcp->samples = samples;
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adcp->depth = depth;
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adcp->grpp = grpp;
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adcp->state = ADC_ACTIVE;
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adc_lld_start_conversion(adcp);
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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 ADC_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] adcp pointer to the @p ADCDriver object
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*
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* @api
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*/
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void adcStopConversion(ADCDriver *adcp) {
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chDbgCheck(adcp != NULL, "adcStopConversion");
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chSysLock();
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chDbgAssert((adcp->state == ADC_READY) ||
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(adcp->state == ADC_ACTIVE),
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"adcStopConversion(), #1", "invalid state");
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if (adcp->state != ADC_READY) {
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adc_lld_stop_conversion(adcp);
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adcp->grpp = NULL;
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adcp->state = ADC_READY;
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_adc_reset_s(adcp);
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}
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chSysUnlock();
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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 ADC_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] adcp pointer to the @p ADCDriver object
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*
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* @iclass
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*/
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void adcStopConversionI(ADCDriver *adcp) {
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chDbgCheckClassI();
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chDbgCheck(adcp != NULL, "adcStopConversionI");
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chDbgAssert((adcp->state == ADC_READY) ||
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(adcp->state == ADC_ACTIVE) ||
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(adcp->state == ADC_COMPLETE),
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"adcStopConversionI(), #1", "invalid state");
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if (adcp->state != ADC_READY) {
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adc_lld_stop_conversion(adcp);
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adcp->grpp = NULL;
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adcp->state = ADC_READY;
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_adc_reset_i(adcp);
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}
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}
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#if ADC_USE_WAIT || defined(__DOXYGEN__)
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/**
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* @brief Performs an ADC conversion.
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* @details Performs a synchronous conversion operation.
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* @note The buffer is organized as a matrix of M*N elements where M is the
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* channels number configured into the conversion group and N is the
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* buffer depth. The samples are sequentially written into the buffer
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* with no gaps.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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* @param[in] grpp pointer to a @p ADCConversionGroup object
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* @param[out] samples pointer to the samples buffer
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* @param[in] depth buffer depth (matrix rows number). The buffer depth
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* must be one or an even number.
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* @return The operation result.
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* @retval RDY_OK Conversion finished.
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* @retval RDY_RESET The conversion has been stopped using
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* @p acdStopConversion() or @p acdStopConversionI(),
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* the result buffer may contain incorrect data.
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* @retval RDY_TIMEOUT The conversion has been stopped because an hardware
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* error.
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*
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* @api
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*/
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msg_t adcConvert(ADCDriver *adcp,
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const ADCConversionGroup *grpp,
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adcsample_t *samples,
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size_t depth) {
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msg_t msg;
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chSysLock();
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chDbgAssert(adcp->thread == NULL, "adcConvert(), #1", "already waiting");
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adcStartConversionI(adcp, grpp, samples, depth);
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adcp->thread = chThdSelf();
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chSchGoSleepS(THD_STATE_SUSPENDED);
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msg = chThdSelf()->p_u.rdymsg;
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chSysUnlock();
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return msg;
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}
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#endif /* ADC_USE_WAIT */
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#if ADC_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
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/**
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* @brief Gains exclusive access to the ADC peripheral.
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* @details This function tries to gain ownership to the ADC bus, if the bus
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* is already being used then the invoking thread is queued.
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* @pre In order to use this function the option
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* @p ADC_USE_MUTUAL_EXCLUSION must be enabled.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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*
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* @api
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*/
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void adcAcquireBus(ADCDriver *adcp) {
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chDbgCheck(adcp != NULL, "adcAcquireBus");
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#if CH_USE_MUTEXES
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chMtxLock(&adcp->mutex);
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#elif CH_USE_SEMAPHORES
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chSemWait(&adcp->semaphore);
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#endif
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}
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/**
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* @brief Releases exclusive access to the ADC peripheral.
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* @pre In order to use this function the option
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* @p ADC_USE_MUTUAL_EXCLUSION must be enabled.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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*
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* @api
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*/
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void adcReleaseBus(ADCDriver *adcp) {
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chDbgCheck(adcp != NULL, "adcReleaseBus");
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#if CH_USE_MUTEXES
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(void)adcp;
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chMtxUnlock();
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#elif CH_USE_SEMAPHORES
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chSemSignal(&adcp->semaphore);
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#endif
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}
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#endif /* ADC_USE_MUTUAL_EXCLUSION */
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#endif /* HAL_USE_ADC */
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/** @} */
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