314 lines
11 KiB
C
314 lines
11 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 templates/pal_lld.h
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* @brief PAL subsystem low level driver header template.
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*
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* @addtogroup PAL_LLD
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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 CH_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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/*===========================================================================*/
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/* I/O Ports Types and constants. */
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/*===========================================================================*/
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/**
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* @brief Generic I/O ports 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 initialized 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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* @note This structure content is architecture dependent. The nome should
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* be changed to include the architecture name following this
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* pattern:<br>
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* - [ARCH][CELL]Config.
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* .
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* As example:<br>
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* - MSP430DIOConfig.
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* .
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*/
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typedef struct {
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} GenericConfig;
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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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* @brief 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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* @details This type can be a scalar or some kind of pointer, do not make
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* any assumption about it, use the provided macros when populating
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* variables of this type.
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*/
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typedef uint32_t 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 First I/O port identifier.
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* @details Low level drivers can define multiple ports, it is suggested to
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* use this naming convention.
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*/
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#define IOPORT1 0
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/*===========================================================================*/
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/* Implementation, some of the following macros could be implemented as */
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/* functions, if so please put them in pal_lld.c. */
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/*===========================================================================*/
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/**
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* @brief Low level PAL subsystem initialization.
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*
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* @param[in] config architecture-dependent ports configuration
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*/
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#define pal_lld_init(config)
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/**
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* @brief Reads the physical I/O port states.
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* @note This function is not meant to be invoked directly by the
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* application code.
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*
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* @param[in] port port identifier
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* @return The port bits.
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*/
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#define pal_lld_readport(port)
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/**
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* @brief Reads the output latch.
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* @details The purpose of this function is to read back the latched output
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* value.
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* @note This function is not meant to be invoked directly by the
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* application code.
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*
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* @param[in] port port identifier
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* @return The latched logical states.
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*/
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#define pal_lld_readlatch(port)
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/**
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* @brief Writes a bits mask on a I/O port.
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* @note This function is not meant to be invoked directly by the
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* application code.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be written on the specified port
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*/
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#define pal_lld_writeport(port, bits)
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/**
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* @brief Sets a bits mask on a I/O port.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be ORed on the specified port
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*/
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#define pal_lld_setport(port, bits)
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/**
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* @brief Clears a bits mask on a I/O port.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be cleared on the specified port
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*/
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#define pal_lld_clearport(port, bits)
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/**
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* @brief Toggles a bits mask on a I/O port.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be XORed on the specified port
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*/
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#define pal_lld_toggleport(port, bits)
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/**
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* @brief Reads a group of bits.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] offset group bit offset within the port
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* @return The group logical states.
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*/
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#define pal_lld_readgroup(port, mask, offset)
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/**
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* @brief Writes a group of bits.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] offset group bit offset within the port
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* @param[in] bits bits to be written. Values exceeding the group width
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* are masked.
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*/
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#define pal_lld_writegroup(port, mask, offset, bits)
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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 This function is not meant to be invoked directly by the
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* application code.
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* @note Programming an unknown or unsupported mode is silently ignored.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] mode group mode
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*/
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#define pal_lld_setgroupmode(port, mask, mode)
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/**
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* @brief Reads a logical state from an I/O pad.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @return The logical state.
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* @retval PAL_LOW low logical state.
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* @retval PAL_HIGH high logical state.
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*/
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#define pal_lld_readpad(port, pad)
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/**
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* @brief Writes a logical state on an output pad.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @param[out] 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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#define pal_lld_writepad(port, pad, bit)
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/**
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* @brief Sets a pad logical state to @p PAL_HIGH.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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*/
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#define pal_lld_setpad(port, pad)
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/**
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* @brief Clears a pad logical state to @p PAL_LOW.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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*/
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#define pal_lld_clearpad(port, pad)
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/**
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* @brief Toggles a pad logical state.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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*/
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#define pal_lld_togglepad(port, pad)
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/**
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* @brief Pad mode setup.
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* @details This function programs a pad with the specified mode.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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* @note Programming an unknown or unsupported mode is silently ignored.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @param[in] mode pad mode
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*/
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#define pal_lld_setpadmode(port, pad, mode)
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#endif /* CH_HAL_USE_PAL */
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#endif /* _PAL_LLD_H_ */
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/** @} */
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