205 lines
6.4 KiB
C
205 lines
6.4 KiB
C
|
/*
|
||
|
|
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 <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @file ext.c
|
||
|
|
* @brief EXT Driver code.
|
||
|
|
*
|
||
|
|
* @addtogroup EXT
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "hal.h"
|
||
|
|
|
||
|
|
#if HAL_USE_EXT || defined(__DOXYGEN__)
|
||
|
|
|
||
|
|
/*===========================================================================*/
|
||
|
|
/* Driver local definitions. */
|
||
|
|
/*===========================================================================*/
|
||
|
|
|
||
|
|
/*===========================================================================*/
|
||
|
|
/* Driver exported variables. */
|
||
|
|
/*===========================================================================*/
|
||
|
|
|
||
|
|
/*===========================================================================*/
|
||
|
|
/* Driver local variables and types. */
|
||
|
|
/*===========================================================================*/
|
||
|
|
|
||
|
|
/*===========================================================================*/
|
||
|
|
/* Driver local functions. */
|
||
|
|
/*===========================================================================*/
|
||
|
|
|
||
|
|
/*===========================================================================*/
|
||
|
|
/* Driver exported functions. */
|
||
|
|
/*===========================================================================*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief EXT Driver initialization.
|
||
|
|
* @note This function is implicitly invoked by @p halInit(), there is
|
||
|
|
* no need to explicitly initialize the driver.
|
||
|
|
*
|
||
|
|
* @init
|
||
|
|
*/
|
||
|
|
void extInit(void) {
|
||
|
|
|
||
|
|
ext_lld_init();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Initializes the standard part of a @p EXTDriver structure.
|
||
|
|
*
|
||
|
|
* @param[out] extp pointer to the @p EXTDriver object
|
||
|
|
*
|
||
|
|
* @init
|
||
|
|
*/
|
||
|
|
void extObjectInit(EXTDriver *extp) {
|
||
|
|
|
||
|
|
extp->state = EXT_STOP;
|
||
|
|
extp->config = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Configures and activates the EXT peripheral.
|
||
|
|
* @post After activation all EXT channels are in the disabled state,
|
||
|
|
* use @p extChannelEnable() in order to activate them.
|
||
|
|
*
|
||
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
||
|
|
* @param[in] config pointer to the @p EXTConfig object
|
||
|
|
*
|
||
|
|
* @api
|
||
|
|
*/
|
||
|
|
void extStart(EXTDriver *extp, const EXTConfig *config) {
|
||
|
|
|
||
|
|
osalDbgCheck((extp != NULL) && (config != NULL));
|
||
|
|
|
||
|
|
osalSysLock();
|
||
|
|
osalDbgAssert((extp->state == EXT_STOP) || (extp->state == EXT_ACTIVE),
|
||
|
|
"invalid state");
|
||
|
|
extp->config = config;
|
||
|
|
ext_lld_start(extp);
|
||
|
|
extp->state = EXT_ACTIVE;
|
||
|
|
osalSysUnlock();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Deactivates the EXT peripheral.
|
||
|
|
*
|
||
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
||
|
|
*
|
||
|
|
* @api
|
||
|
|
*/
|
||
|
|
void extStop(EXTDriver *extp) {
|
||
|
|
|
||
|
|
osalDbgCheck(extp != NULL);
|
||
|
|
|
||
|
|
osalSysLock();
|
||
|
|
osalDbgAssert((extp->state == EXT_STOP) || (extp->state == EXT_ACTIVE),
|
||
|
|
"invalid state");
|
||
|
|
ext_lld_stop(extp);
|
||
|
|
extp->state = EXT_STOP;
|
||
|
|
osalSysUnlock();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Enables an EXT channel.
|
||
|
|
* @pre The channel must not be in @p EXT_CH_MODE_DISABLED mode.
|
||
|
|
*
|
||
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
||
|
|
* @param[in] channel channel to be enabled
|
||
|
|
*
|
||
|
|
* @api
|
||
|
|
*/
|
||
|
|
void extChannelEnable(EXTDriver *extp, expchannel_t channel) {
|
||
|
|
|
||
|
|
osalDbgCheck((extp != NULL) && (channel < EXT_MAX_CHANNELS));
|
||
|
|
|
||
|
|
osalSysLock();
|
||
|
|
osalDbgAssert((extp->state == EXT_ACTIVE) &&
|
||
|
|
((extp->config->channels[channel].mode &
|
||
|
|
EXT_CH_MODE_EDGES_MASK) != EXT_CH_MODE_DISABLED),
|
||
|
|
"invalid state");
|
||
|
|
extChannelEnableI(extp, channel);
|
||
|
|
osalSysUnlock();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Disables an EXT channel.
|
||
|
|
* @pre The channel must not be in @p EXT_CH_MODE_DISABLED mode.
|
||
|
|
*
|
||
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
||
|
|
* @param[in] channel channel to be disabled
|
||
|
|
*
|
||
|
|
* @api
|
||
|
|
*/
|
||
|
|
void extChannelDisable(EXTDriver *extp, expchannel_t channel) {
|
||
|
|
|
||
|
|
osalDbgCheck((extp != NULL) && (channel < EXT_MAX_CHANNELS));
|
||
|
|
|
||
|
|
osalSysLock();
|
||
|
|
osalDbgAssert((extp->state == EXT_ACTIVE) &&
|
||
|
|
((extp->config->channels[channel].mode &
|
||
|
|
EXT_CH_MODE_EDGES_MASK) != EXT_CH_MODE_DISABLED),
|
||
|
|
"invalid state");
|
||
|
|
extChannelDisableI(extp, channel);
|
||
|
|
osalSysUnlock();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Changes the operation mode of a channel.
|
||
|
|
* @note This function attempts to write over the current configuration
|
||
|
|
* structure that must have been not declared constant. This
|
||
|
|
* violates the @p const qualifier in @p extStart() but it is
|
||
|
|
* intentional.
|
||
|
|
* @note This function cannot be used if the configuration structure is
|
||
|
|
* declared @p const.
|
||
|
|
* @note The effect of this function on constant configuration structures
|
||
|
|
* is not defined.
|
||
|
|
*
|
||
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
||
|
|
* @param[in] channel channel to be changed
|
||
|
|
* @param[in] extcp new configuration for the channel
|
||
|
|
*
|
||
|
|
* @iclass
|
||
|
|
*/
|
||
|
|
void extSetChannelModeI(EXTDriver *extp,
|
||
|
|
expchannel_t channel,
|
||
|
|
const EXTChannelConfig *extcp) {
|
||
|
|
EXTChannelConfig *oldcp;
|
||
|
|
|
||
|
|
osalDbgCheck((extp != NULL) &&
|
||
|
|
(channel < EXT_MAX_CHANNELS) &&
|
||
|
|
(extcp != NULL));
|
||
|
|
|
||
|
|
osalDbgAssert(extp->state == EXT_ACTIVE, "invalid state");
|
||
|
|
|
||
|
|
/* Note that here the access is enforced as non-const, known access
|
||
|
|
violation.*/
|
||
|
|
oldcp = (EXTChannelConfig *)&extp->config->channels[channel];
|
||
|
|
|
||
|
|
/* Overwiting the old channels configuration then the channel is reconfigured
|
||
|
|
by the low level driver.*/
|
||
|
|
*oldcp = *extcp;
|
||
|
|
ext_lld_channel_enable(extp, channel);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* HAL_USE_EXT */
|
||
|
|
|
||
|
|
/** @} */
|