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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 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 LPC214x/pal_lld.h
* @brief LPC214x FIO low level driver header.
*
* @addtogroup PAL
* @{
*/
#ifndef _PAL_LLD_H_
#define _PAL_LLD_H_
#if HAL_USE_PAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Unsupported modes and specific modes */
/*===========================================================================*/
#undef PAL_MODE_INPUT_PULLUP
#undef PAL_MODE_INPUT_PULLDOWN
#undef PAL_MODE_OUTPUT_OPENDRAIN
/*===========================================================================*/
/* I/O Ports Types and constants. */
/*===========================================================================*/
/**
* @brief FIO port setup info.
*/
typedef struct {
/** Initial value for FIO_PIN register.*/
uint32_t pin;
/** Initial value for FIO_DIR register.*/
uint32_t dir;
} lpc214x_fio_setup_t;
/**
* @brief LPC214x FIO static initializer.
* @details An instance of this structure must be passed to @p palInit() at
* system startup time in order to initialize the digital I/O
* subsystem. This represents only the initial setup, specific pads
* or whole ports can be reprogrammed at later time.
*/
typedef struct {
/** @brief PINSEL0 initial value.*/
uint32_t pinsel0;
/** @brief PINSEL1 initial value.*/
uint32_t pinsel1;
/** @brief PINSEL2 initial value.*/
uint32_t pinsel2;
/** @brief Port 0 setup data.*/
lpc214x_fio_setup_t P0Data;
/** @brief Port 1 setup data.*/
lpc214x_fio_setup_t P1Data;
} PALConfig;
/**
* @brief Width, in bits, of an I/O port.
*/
#define PAL_IOPORTS_WIDTH 32
/**
* @brief Whole port mask.
* @details This macro specifies all the valid bits into a port.
*/
#define PAL_WHOLE_PORT ((ioportmask_t)0xFFFFFFFF)
/**
* @brief Digital I/O port sized unsigned type.
*/
typedef uint32_t ioportmask_t;
/**
* @brief Port Identifier.
*/
typedef FIO * ioportid_t;
/*===========================================================================*/
/* I/O Ports Identifiers. */
/*===========================================================================*/
/**
* @brief FIO port 0 identifier.
*/
#define IOPORT1 FIO0Base
/**
* @brief FIO port 1 identifier.
*/
#define IOPORT2 FIO1Base
/*===========================================================================*/
/* Implementation, some of the following macros could be implemented as */
/* functions, please put them in a file named ioports_lld.c if so. */
/*===========================================================================*/
/**
* @brief FIO subsystem initialization.
* @details Enables the access through the fast registers.
*/
#define pal_lld_init(config) _pal_lld_init(config)
/**
* @brief Reads an I/O port.
* @details This function is implemented by reading the FIO PIN register, the
* implementation has no side effects.
*
* @param[in] port the port identifier
* @return The port bits.
*
* @notapi
*/
#define pal_lld_readport(port) ((port)->FIO_PIN)
/**
* @brief Reads the output latch.
* @details This function is implemented by reading the FIO SET register, the
* implementation has no side effects.
*
* @param[in] port the port identifier
* @return The latched logical states.
*
* @notapi
*/
#define pal_lld_readlatch(port) ((port)->FIO_SET)
/**
* @brief Writes a bits mask on a I/O port.
* @details This function is implemented by writing the FIO PIN register, the
* implementation has no side effects.
*
* @param[in] port the port identifier
* @param[in] bits the bits to be written on the specified port
*
* @notapi
*/
#define pal_lld_writeport(port, bits) ((port)->FIO_PIN = (bits))
/**
* @brief Sets a bits mask on a I/O port.
* @details This function is implemented by writing the FIO SET register, the
* implementation has no side effects.
*
* @param[in] port the port identifier
* @param[in] bits the bits to be ORed on the specified port
*
* @notapi
*/
#define pal_lld_setport(port, bits) ((port)->FIO_SET = (bits))
/**
* @brief Clears a bits mask on a I/O port.
* @details This function is implemented by writing the FIO CLR register, the
* implementation has no side effects.
*
* @param[in] port the port identifier
* @param[in] bits the bits to be cleared on the specified port
*
* @notapi
*/
#define pal_lld_clearport(port, bits) ((port)->FIO_CLR = (bits))
/**
* @brief Writes a value on an I/O bus.
* @details This function is implemented by writing the FIO PIN and MASK
* registers, the implementation is not atomic because the multiple
* accesses.
*
* @param[in] port the port identifier
* @param[in] mask the group mask, a logical AND is performed on the
* output data
* @param[in] offset the group bit offset within the port
* @param[in] bits the bits to be written. Values exceeding the group
* width are masked.
*
* @notapi
*/
#define pal_lld_writegroup(port, mask, offset, bits) { \
(port)->FIO_MASK = ~((mask) << (offset)); \
(port)->FIO_PIN = (bits) << (offset); \
(port)->FIO_MASK = 0; \
}
/**
* @brief Pads group mode setup.
* @details This function programs a pads group belonging to the same port
* with the specified mode.
* @note @p PAL_MODE_UNCONNECTED is implemented as push pull output with
* high state.
* @note This function does not alter the @p PINSELx registers. Alternate
* functions setup must be handled by device-specific code.
*
* @param[in] port the port identifier
* @param[in] mask the group mask
* @param[in] mode the mode
*
* @notapi
*/
#define pal_lld_setgroupmode(port, mask, mode) \
_pal_lld_setgroupmode(port, mask, mode)
/**
* @brief Writes a logical state on an output pad.
*
* @param[in] port the port identifier
* @param[in] pad the pad number within the port
* @param[in] bit logical value, the value must be @p PAL_LOW or
* @p PAL_HIGH
*
* @notapi
*/
#define pal_lld_writepad(port, pad, bit) pal_lld_writegroup(port, 1, pad, bit)
/**
* @brief FIO port setup.
* @details This function programs the pins direction within a port.
*
* @notapi
*/
#define pal_lld_lpc214x_set_direction(port, dir) { \
(port)->FIO_DIR = (dir); \
}
extern const PALConfig pal_default_config;
#ifdef __cplusplus
extern "C" {
#endif
void _pal_lld_init(const PALConfig *config);
void _pal_lld_setgroupmode(ioportid_t port,
ioportmask_t mask,
uint_fast8_t mode);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_PAL */
#endif /* _PAL_LLD_H_ */
/** @} */
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