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/*
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @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 Digital I/O modes.
*/
typedef uint32_t iomode_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, if so please put them in pal_lld.c. */
/*===========================================================================*/
/**
* @brief FIO subsystem initialization.
* @details Enables the access through the fast registers.
*
* @notapi
*/
#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 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 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 port identifier
* @param[in] bits 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 port identifier
* @param[in] bits 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 port identifier
* @param[in] bits 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 port identifier
* @param[in] mask group mask, a logical AND is performed on the
* output data
* @param[in] offset the group bit offset within the port
* @param[in] bits 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 port identifier
* @param[in] mask group mask
* @param[in] offset group bit offset within the port
* @param[in] mode group mode
*
* @notapi
*/
#define pal_lld_setgroupmode(port, mask, offset, mode) \
_pal_lld_setgroupmode(port, mask << offset, mode)
/**
* @brief Writes a logical state on an output pad.
*
* @param[in] port port identifier
* @param[in] pad 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,
iomode_t mode);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_PAL */
#endif /* _PAL_LLD_H_ */
/** @} */
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