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