DAC merge and rework, part 1.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@5911 35acf78f-673a-0410-8e92-d51de3d6d3f4master
gdisirio
parent
6514f4422c
commit
e01bc962c7
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@ -0,0 +1,324 @@
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012 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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/**
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* @file dac.h
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* @brief DAC Driver macros and structures.
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*
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* @addtogroup DAC
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* @{
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*/
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#ifndef _DAC_H_
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#define _DAC_H_
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#if HAL_USE_DAC || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @name DAC configuration options
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* @{
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*/
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/**
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* @brief Enables synchronous APIs.
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* @note Disabling this option saves both code and data space.
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*/
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#if !defined(DAC_USE_WAIT) || defined(__DOXYGEN__)
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#define DAC_USE_WAIT TRUE
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#endif
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/**
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* @brief Enables the @p dacAcquireBus() and @p dacReleaseBus() APIs.
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* @note Disabling this option saves both code and data space.
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*/
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#if !defined(DAC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
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#define DAC_USE_MUTUAL_EXCLUSION TRUE
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#endif
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/** @} */
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if DAC_USE_MUTUAL_EXCLUSION && !CH_USE_MUTEXES && !CH_USE_SEMAPHORES
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#error "DAC_USE_MUTUAL_EXCLUSION requires CH_USE_MUTEXES and/or CH_USE_SEMAPHORES"
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#endif
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief Driver state machine possible states.
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*/
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typedef enum {
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DAC_UNINIT = 0, /**< Not initialized. */
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DAC_STOP = 1, /**< Stopped. */
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DAC_READY = 2, /**< Ready. */
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DAC_ACTIVE = 3, /**< Exchanging data. */
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DAC_COMPLETE = 4, /**< Asynchronous operation complete. */
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DAC_ERROR = 5 /**< Error. */
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} dacstate_t;
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#include "dac_lld.h"
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/**
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* @name Low Level driver helper macros
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* @{
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*/
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#if DAC_USE_WAIT || defined(__DOXYGEN__)
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/**
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* @brief Waits for operation completion.
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* @details This function waits for the driver to complete the current
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* operation.
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* @pre An operation must be running while the function is invoked.
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* @note No more than one thread can wait on a DAC driver using
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* this function.
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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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#define _dac_wait_s(dacp) { \
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chDbgAssert((dacp)->thread == NULL, \
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"_dac_wait_s(), #1", "already waiting"); \
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(dacp)->thread = chThdSelf(); \
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chSchGoSleepS(THD_STATE_SUSPENDED); \
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}
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/**
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* @brief Resumes a thread waiting for a conversion completion.
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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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#define _dac_reset_i(dacp) { \
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if ((dacp)->thread != NULL) { \
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Thread *tp = (dacp)->thread; \
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(dacp)->thread = NULL; \
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tp->p_u.rdymsg = RDY_RESET; \
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chSchReadyI(tp); \
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} \
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}
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/**
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* @brief Resumes a thread waiting for a conversion completion.
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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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#define _dac_reset_s(dacp) { \
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if ((dacp)->thread != NULL) { \
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Thread *tp = (dacp)->thread; \
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(dacp)->thread = NULL; \
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chSchWakeupS(tp, RDY_RESET); \
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} \
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}
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/**
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* @brief Wakes up the waiting thread.
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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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#define _dac_wakeup_isr(dacp) { \
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chSysLockFromIsr(); \
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if ((dacp)->thread != NULL) { \
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Thread *tp; \
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tp = (dacp)->thread; \
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(dacp)->thread = NULL; \
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tp->p_u.rdymsg = RDY_OK; \
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chSchReadyI(tp); \
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} \
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chSysUnlockFromIsr(); \
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}
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/**
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* @brief Wakes up the waiting thread with a timeout message.
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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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#define _dac_timeout_isr(dacp) { \
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chSysLockFromIsr(); \
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if ((dacp)->thread != NULL) { \
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Thread *tp; \
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tp = (dacp)->thread; \
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(dacp)->thread = NULL; \
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tp->p_u.rdymsg = RDY_TIMEOUT; \
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chSchReadyI(tp); \
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} \
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chSysUnlockFromIsr(); \
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}
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#else /* !DAC_USE_WAIT */
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#define _dac_wait_s(dacp)
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#define _dac_reset_i(dacp)
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#define _dac_reset_s(dacp)
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#define _dac_wakeup_isr(dacp)
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#define _dac_timeout_isr(dacp)
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#endif /* !DAC_USE_WAIT */
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/**
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* @brief Common ISR code, half buffer event.
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* @details This code handles the portable part of the ISR code:
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* - Callback invocation.
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* .
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* @note This macro is meant to be used in the low level drivers
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* implementation only.
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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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#define _dac_isr_half_code(dacp) { \
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if ((dacp)->grpp->end_cb != NULL) { \
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(dacp)->grpp->end_cb(dacp, (dacp)->samples, (dacp)->depth / 2); \
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} \
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}
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/**
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* @brief Common ISR code, full buffer event.
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* @details This code handles the portable part of the ISR code:
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* - Callback invocation.
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* - Waiting thread wakeup, if any.
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* - Driver state transitions.
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* .
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* @note This macro is meant to be used in the low level drivers
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* implementation only.
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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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#define _dac_isr_full_code(dacp) { \
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if ((dacp)->grpp->circular) { \
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/* Callback handling.*/ \
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if ((dacp)->grpp->end_cb != NULL) { \
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if ((dacp)->depth > 1) { \
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/* Invokes the callback passing the 2nd half of the buffer.*/ \
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size_t half = (dacp)->depth / 2; \
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size_t half_index = half * (dacp)->grpp->num_channels; \
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(dacp)->grpp->end_cb(dacp, (dacp)->samples + half_index, half); \
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} \
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else { \
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/* Invokes the callback passing the whole buffer.*/ \
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(dacp)->grpp->end_cb(dacp, (dacp)->samples, (dacp)->depth); \
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} \
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} \
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} \
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else { \
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/* End conversion.*/ \
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dac_lld_stop_conversion(dacp); \
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if ((dacp)->grpp->end_cb != NULL) { \
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(dacp)->state = DAC_COMPLETE; \
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if ((dacp)->depth > 1) { \
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/* Invokes the callback passing the 2nd half of the buffer.*/ \
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size_t half = (dacp)->depth / 2; \
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size_t half_index = half * (dacp)->grpp->num_channels; \
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(dacp)->grpp->end_cb(dacp, (dacp)->samples + half_index, half); \
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} \
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else { \
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/* Invokes the callback passing the whole buffer.*/ \
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(dacp)->grpp->end_cb(dacp, (dacp)->samples, (dacp)->depth); \
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} \
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if ((dacp)->state == DAC_COMPLETE) { \
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(dacp)->state = DAC_READY; \
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(dacp)->grpp = NULL; \
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} \
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} \
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else { \
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(dacp)->state = DAC_READY; \
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(dacp)->grpp = NULL; \
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} \
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_dac_wakeup_isr(dacp); \
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} \
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}
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/**
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* @brief Common ISR code, error event.
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* @details This code handles the portable part of the ISR code:
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* - Callback invocation.
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* - Waiting thread timeout signaling, if any.
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* - Driver state transitions.
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* .
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* @note This macro is meant to be used in the low level drivers
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* implementation only.
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*
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* @param[in] dacp pointer to the @p DACDriver object
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* @param[in] err platform dependent error code
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*
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* @notapi
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*/
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#define _dac_isr_error_code(dacp, err) { \
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dac_lld_stop_conversion(dacp); \
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if ((dacp)->grpp->error_cb != NULL) { \
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(dacp)->state = DAC_ERROR; \
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(dacp)->grpp->error_cb(dacp, err); \
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if ((dacp)->state == DAC_ERROR) \
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(dacp)->state = DAC_READY; \
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} \
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(dacp)->grpp = NULL; \
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_dac_timeout_isr(dacp); \
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}
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/** @} */
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void dacInit(void);
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void dacObjectInit(DACDriver *dacp);
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void dacStart(DACDriver *dacp, const DACConfig *config);
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void dacStop(DACDriver *dacp);
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void dacStartSend(DACDriver *dacp);
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#if DAC_USE_WAIT
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void dacSend(DACDriver *dacp);
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#endif /* DAC_USE_WAIT */
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#if DAC_USE_MUTUAL_EXCLUSION
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void dacAcquireBus(DACDriver *dacp);
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void dacReleaseBus(DACDriver *dacp);
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#endif /* DAC_USE_MUTUAL_EXCLUSION */
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_DAC */
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#endif /* _DAC_H_ */
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/** @} */
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@ -244,13 +244,14 @@ typedef enum {
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* @notapi
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*/
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#define _spi_wakeup_isr(spip) { \
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chSysLockFromIsr(); \
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if ((spip)->thread != NULL) { \
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Thread *tp = (spip)->thread; \
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(spip)->thread = NULL; \
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chSysLockFromIsr(); \
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tp->p_u.rdymsg = RDY_OK; \
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chSchReadyI(tp); \
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chSysUnlockFromIsr(); \
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} \
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chSysUnlockFromIsr(); \
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}
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#else /* !SPI_USE_WAIT */
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#define _spi_wait_s(spip)
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@ -0,0 +1,286 @@
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012 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
|
||||
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 <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file dac.c
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* @brief DAC Driver code.
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*
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* @addtogroup DAC
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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_DAC || 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. */
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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 DAC 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 dacInit(void) {
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dac_lld_init();
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}
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/**
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* @brief Initializes the standard part of a @p DACDriver structure.
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*
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* @param[out] dacp pointer to the @p DACDriver object
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*
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* @init
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*/
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void dacObjectInit(DACDriver *dacp) {
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dacp->state = DAC_STOP;
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dacp->config = NULL;
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#if DAC_USE_WAIT
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dacp->thread = NULL;
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#endif /* DAC_USE_WAIT */
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#if DAC_USE_MUTUAL_EXCLUSION
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#if CH_USE_MUTEXES
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chMtxInit(&dacp->mutex);
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#else
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chSemInit(&dacp->semaphore, 1);
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#endif
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#endif /* DAC_USE_MUTUAL_EXCLUSION */
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#if defined(DAC_DRIVER_EXT_INIT_HOOK)
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DAC_DRIVER_EXT_INIT_HOOK(dacp);
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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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* @param[in] config pointer to the @p DACConfig object
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*
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* @api
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*/
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void dacStart(DACDriver *dacp, const DACConfig *config) {
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chDbgCheck((dacp != NULL) && (config != NULL), "dacStart");
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chSysLock();
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chDbgAssert((dacp->state == DAC_STOP) || (dacp->state == DAC_READY),
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"dacStart(), #1", "invalid state");
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dacp->config = config;
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dac_lld_start(dacp);
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dacp->state = DAC_READY;
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chSysUnlock();
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}
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/**
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* @brief Deactivates the DAC peripheral.
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* @note Deactivating the peripheral also enforces a release of the slave
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* select line.
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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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* @api
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||||
*/
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void dacStop(DACDriver *dacp) {
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chDbgCheck(dacp != NULL, "dacStop");
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chSysLock();
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chDbgAssert((dacp->state == DAC_STOP) || (dacp->state == DAC_READY),
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"dacStop(), #1", "invalid state");
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dac_lld_stop(dacp);
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dacp->state = DAC_STOP;
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chSysUnlock();
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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 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] dacp pointer to the @p DACDriver object
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||||
* @param[in] grpp pointer to a @p DACConversionGroup object
|
||||
* @param[in] samples pointer to the samples buffer
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||||
* @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) {
|
||||
|
||||
chSysLock();
|
||||
dacStartConversionI(dacp, grpp, samples, depth);
|
||||
chSysUnlock();
|
||||
}
|
||||
|
||||
/**
|
||||
* @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) {
|
||||
|
||||
chDbgCheckClassI();
|
||||
chDbgCheck((dacp != NULL) && (grpp != NULL) && (samples != NULL) &&
|
||||
((depth == 1) || ((depth & 1) == 0)),
|
||||
"dacStartConversionI");
|
||||
chDbgAssert((dacp->state == DAC_READY) ||
|
||||
(dacp->state == DAC_COMPLETE) ||
|
||||
(dacp->state == DAC_ERROR),
|
||||
"dacStartConversionI(), #1", "not ready");
|
||||
|
||||
dacp->samples = samples;
|
||||
dacp->depth = depth;
|
||||
dacp->grpp = grpp;
|
||||
dacp->state = DAC_ACTIVE;
|
||||
dac_lld_start_conversion(dacp);
|
||||
}
|
||||
|
||||
#if DAC_USE_WAIT || 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 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 dacConvert(DACDriver *dacp,
|
||||
const DACConversionGroup *grpp,
|
||||
const dacsample_t *samples,
|
||||
size_t depth) {
|
||||
msg_t msg;
|
||||
|
||||
chSysLock();
|
||||
chDbgAssert(dacp->thread == NULL, "dacConvert(), #1", "already waiting");
|
||||
dacStartConversionI(dacp, grpp, samples, depth);
|
||||
_dac_wait_s(dacp);
|
||||
msg = chThdSelf()->p_u.rdymsg;
|
||||
chSysUnlock();
|
||||
return msg;
|
||||
}
|
||||
#endif /* DAC_USE_WAIT */
|
||||
|
||||
#if DAC_USE_MUTUAL_EXCLUSION || 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) {
|
||||
|
||||
chDbgCheck(dacp != NULL, "dacAcquireBus");
|
||||
|
||||
#if CH_USE_MUTEXES
|
||||
chMtxLock(&dacp->mutex);
|
||||
#elif CH_USE_SEMAPHORES
|
||||
chSemWait(&dacp->semaphore);
|
||||
#endif
|
||||
}
|
||||
|
||||
/**
|
||||
* @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) {
|
||||
|
||||
chDbgCheck(dacp != NULL, "dacReleaseBus");
|
||||
|
||||
#if CH_USE_MUTEXES
|
||||
(void)dacp;
|
||||
chMtxUnlock();
|
||||
#elif CH_USE_SEMAPHORES
|
||||
chSemSignal(&dacp->semaphore);
|
||||
#endif
|
||||
}
|
||||
#endif /* DAC_USE_MUTUAL_EXCLUSION */
|
||||
|
||||
#endif /* HAL_USE_DAC */
|
||||
|
||||
/** @} */
|
||||
Loading…
Reference in New Issue