244 lines
6.7 KiB
C
244 lines
6.7 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
|
2011,2012 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 AT91SAM7/ext_lld.h
|
|
* @brief AT91SAM7 EXT subsystem low level driver header.
|
|
*
|
|
* @addtogroup EXT
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _EXT_LLD_H_
|
|
#define _EXT_LLD_H_
|
|
|
|
#if HAL_USE_EXT || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver constants. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Pointer to the SAM7 AIC register block.
|
|
*/
|
|
#define SAM7_EXT_AIC ((AT91PS_AIC *)AT91C_BASE_AIC)
|
|
|
|
/**
|
|
* @brief Number of channels within one ext driver.
|
|
*/
|
|
#define EXT_MAX_CHANNELS 32
|
|
|
|
/**
|
|
* @brief Mask of priority bits in interrupt mode register.
|
|
*/
|
|
#define SAM7_EXT_PRIORITY_MASK 0x00000007
|
|
|
|
/**
|
|
* @brief Shifter for priority bits in interrupt mode register.
|
|
*/
|
|
#define SAM7_EXT_PRIORITY_SHIFTER 0
|
|
|
|
/**
|
|
* @brief Shifter for mode bits in interrupt mode register.
|
|
*/
|
|
#define SAM7_EXT_MODE_SHIFTER 5
|
|
|
|
/*
|
|
* On the SAM7 architecture, a single channel can only be enables or disabled
|
|
* Hence, undefine the other channel mode constants
|
|
*/
|
|
#ifdef EXT_CH_MODE_RISING_EDGE
|
|
#undef EXT_CH_MODE_RISING_EDGE
|
|
#endif
|
|
|
|
#ifdef EXT_CH_MODE_FALLING_EDGE
|
|
#undef EXT_CH_MODE_FALLING_EDGE
|
|
#endif
|
|
|
|
#ifdef EXT_CH_MODE_BOTH_EDGES
|
|
#undef EXT_CH_MODE_BOTH_EDGES
|
|
#endif
|
|
|
|
/**
|
|
* @name EXT channels mode
|
|
* @{
|
|
*/
|
|
#define EXT_CH_MODE_ENABLED 1 /**< @brief Channel is enabled. */
|
|
/** @} */
|
|
|
|
/**
|
|
* @name EXT drivers mode
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Mask for modes.
|
|
*/
|
|
#define SAM7_EXT_MODE_MASK AT91C_AIC_SRCTYPE
|
|
/**
|
|
* @brief Falling edge callback.
|
|
*/
|
|
#define SAM7_EXT_MODE_FALLING_EDGE AT91C_AIC_SRCTYPE_EXT_NEGATIVE_EDGE
|
|
/**
|
|
* @brief Rising edge callback.
|
|
*/
|
|
#define SAM7_EXT_MODE_RISING_EDGE AT91C_AIC_SRCTYPE_POSITIVE_EDGE
|
|
/**
|
|
* @brief High-level callback.
|
|
*/
|
|
#define SAM7_EXT_MODE_HIGH_LEVEL AT91C_AIC_SRCTYPE_HIGH_LEVEL
|
|
/**
|
|
* @brief Low-level callback.
|
|
*/
|
|
#define SAM7_EXT_MODE_LOW_LEVEL AT91C_AIC_SRCTYPE_EXT_LOW_LEVEL
|
|
/** @} */
|
|
|
|
/**
|
|
* @name EXT drivers priorities
|
|
* @{
|
|
*/
|
|
#define SAM7_EXT_PRIOR_HIGHEST AT91C_AIC_PRIOR_HIGHEST
|
|
#define SAM7_EXT_PRIOR_LOWEST AT91C_AIC_PRIOR_LOWEST
|
|
/** @} */
|
|
|
|
/*===========================================================================*/
|
|
/* Driver pre-compile time settings. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Derived constants and error checks. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver data structures and types. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief EXT channel identifier.
|
|
*/
|
|
typedef uint32_t expchannel_t;
|
|
|
|
/**
|
|
* @brief Type of an EXT generic notification callback.
|
|
*
|
|
* @param[in] extp pointer to the @p EXPDriver object triggering the
|
|
* callback
|
|
*/
|
|
typedef void (*extcallback_t)(EXTDriver *extp, expchannel_t channel);
|
|
|
|
/**
|
|
* @brief Channel configuration structure.
|
|
*/
|
|
typedef struct {
|
|
/**
|
|
* @brief Channel mode.
|
|
*/
|
|
uint32_t mode;
|
|
/**
|
|
* @brief Channel callback.
|
|
*/
|
|
extcallback_t cb;
|
|
} EXTChannelConfig;
|
|
|
|
/**
|
|
* @brief Driver configuration structure.
|
|
* @note It could be empty on some architectures.
|
|
*/
|
|
typedef struct {
|
|
/**
|
|
* @brief Channel configurations.
|
|
*/
|
|
EXTChannelConfig channels[EXT_MAX_CHANNELS];
|
|
/* End of the mandatory fields.*/
|
|
/**
|
|
* @brief interrupt mode.
|
|
*/
|
|
uint32_t mode;
|
|
/**
|
|
* @brief interrupt priority.
|
|
*/
|
|
uint32_t priority;
|
|
} EXTConfig;
|
|
|
|
/**
|
|
* @brief Structure representing an EXT driver.
|
|
*/
|
|
struct EXTDriver {
|
|
/**
|
|
* @brief Driver state.
|
|
*/
|
|
extstate_t state;
|
|
/**
|
|
* @brief Current configuration data.
|
|
*/
|
|
const EXTConfig *config;
|
|
/* End of the mandatory fields.*/
|
|
|
|
/**
|
|
* @brief Pointer to the corresponding PIO registers block.
|
|
*/
|
|
AT91PS_PIO pio;
|
|
/**
|
|
* @brief peripheral ID of the corresponding PIO block.
|
|
*/
|
|
uint32_t pid;
|
|
};
|
|
|
|
/*===========================================================================*/
|
|
/* Driver macros. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Computes the content for the interrupt source mode register.
|
|
*/
|
|
#define SAM7_computeSMR(mode, prio) ( \
|
|
((mode & SAM7_EXT_MODE_MASK) << SAM7_EXT_MODE_SHIFTER) | \
|
|
((prio & SAM7_EXT_PRIORITY_MASK) << SAM7_EXT_PRIORITY_SHIFTER) \
|
|
)
|
|
|
|
/*===========================================================================*/
|
|
/* External declarations. */
|
|
/*===========================================================================*/
|
|
|
|
#if !defined(__DOXYGEN__)
|
|
extern EXTDriver EXTDA;
|
|
#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
|
|
(SAM7_PLATFORM == SAM7X512) || (SAM7_PLATFORM == SAM7A3)
|
|
extern EXTDriver EXTDB;
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
void ext_lld_init(void);
|
|
void ext_lld_start(EXTDriver *extp);
|
|
void ext_lld_stop(EXTDriver *extp);
|
|
void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel);
|
|
void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* HAL_USE_EXT */
|
|
|
|
#endif /* _EXT_LLD_H_ */
|
|
|
|
/** @} */
|