mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2026-09-11 00:59:28 +00:00
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 ext.c
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* @brief EXT Driver code.
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*
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* @addtogroup EXT
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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_EXT || 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 EXT 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 extInit(void) {
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ext_lld_init();
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}
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/**
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* @brief Initializes the standard part of a @p EXTDriver structure.
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*
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* @param[out] extp pointer to the @p EXTDriver object
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*
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* @init
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*/
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void extObjectInit(EXTDriver *extp) {
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extp->state = EXT_STOP;
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extp->config = NULL;
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}
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/**
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* @brief Configures and activates the EXT peripheral.
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* @post After activation all EXT channels are in the disabled state,
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* use @p extChannelEnable() in order to activate them.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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* @param[in] config pointer to the @p EXTConfig object
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*
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* @api
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*/
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void extStart(EXTDriver *extp, const EXTConfig *config) {
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chDbgCheck((extp != NULL) && (config != NULL), "extStart");
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chSysLock();
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chDbgAssert((extp->state == EXT_STOP) || (extp->state == EXT_ACTIVE),
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"extStart(), #1", "invalid state");
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extp->config = config;
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ext_lld_start(extp);
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extp->state = EXT_ACTIVE;
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chSysUnlock();
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}
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/**
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* @brief Deactivates the EXT peripheral.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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*
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* @api
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*/
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void extStop(EXTDriver *extp) {
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chDbgCheck(extp != NULL, "extStop");
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chSysLock();
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chDbgAssert((extp->state == EXT_STOP) || (extp->state == EXT_ACTIVE),
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"extStop(), #1", "invalid state");
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ext_lld_stop(extp);
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extp->state = EXT_STOP;
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chSysUnlock();
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}
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/**
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* @brief Enables an EXT channel.
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* @pre The channel must not be in @p EXT_CH_MODE_DISABLED mode.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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* @param[in] channel channel to be enabled
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*
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* @api
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*/
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void extChannelEnable(EXTDriver *extp, expchannel_t channel) {
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chDbgCheck((extp != NULL) && (channel < EXT_MAX_CHANNELS),
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"extChannelEnable");
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chSysLock();
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chDbgAssert((extp->state == EXT_ACTIVE) &&
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((extp->config->channels[channel].mode &
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EXT_CH_MODE_EDGES_MASK) != EXT_CH_MODE_DISABLED),
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"extChannelEnable(), #1", "invalid state");
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extChannelEnableI(extp, channel);
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chSysUnlock();
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}
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/**
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* @brief Disables an EXT channel.
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* @pre The channel must not be in @p EXT_CH_MODE_DISABLED mode.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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* @param[in] channel channel to be disabled
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*
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* @api
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*/
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void extChannelDisable(EXTDriver *extp, expchannel_t channel) {
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chDbgCheck((extp != NULL) && (channel < EXT_MAX_CHANNELS),
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"extChannelDisable");
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chSysLock();
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chDbgAssert((extp->state == EXT_ACTIVE) &&
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((extp->config->channels[channel].mode &
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EXT_CH_MODE_EDGES_MASK) != EXT_CH_MODE_DISABLED),
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"extChannelDisable(), #1", "invalid state");
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extChannelDisableI(extp, channel);
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chSysUnlock();
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}
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/**
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* @brief Changes the operation mode of a channel.
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* @note This function attempts to write over the current configuration
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* structure that must have been not declared constant. This
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* violates the @p const qualifier in @p extStart() but it is
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* intentional.
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* @note This function cannot be used if the configuration structure is
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* declared @p const.
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* @note The effect of this function on constant configuration structures
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* is not defined.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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* @param[in] channel channel to be changed
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* @param[in] extcp new configuration for the channel
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*
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* @iclass
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*/
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void extSetChannelModeI(EXTDriver *extp,
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expchannel_t channel,
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const EXTChannelConfig *extcp) {
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EXTChannelConfig *oldcp;
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chDbgCheck((extp != NULL) && (channel < EXT_MAX_CHANNELS) &&
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(extcp != NULL), "extSetChannelModeI");
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chDbgAssert(extp->state == EXT_ACTIVE,
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"extSetChannelModeI(), #1", "invalid state");
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/* Note that here the access is enforced as non-const, known access
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violation.*/
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oldcp = (EXTChannelConfig *)&extp->config->channels[channel];
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/* Overwiting the old channels configuration then the channel is reconfigured
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by the low level driver.*/
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*oldcp = *extcp;
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ext_lld_channel_enable(extp, channel);
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}
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#endif /* HAL_USE_EXT */
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/** @} */
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