/* ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, 2011,2012,2013 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 . */ /** * @file templates/pal_lld.h * @brief PAL subsystem low level driver header template. * * @addtogroup PAL * @{ */ #ifndef _PAL_LLD_H_ #define _PAL_LLD_H_ #if HAL_USE_PAL || defined(__DOXYGEN__) /*===========================================================================*/ /* Unsupported modes and specific modes */ /*===========================================================================*/ /*===========================================================================*/ /* I/O Ports Types and constants. */ /*===========================================================================*/ /** * @brief Generic I/O ports static initializer. * @details An instance of this structure must be passed to @p palInit() at * system startup time in order to initialized the digital I/O * subsystem. This represents only the initial setup, specific pads * or whole ports can be reprogrammed at later time. * @note Implementations may extend this structure to contain more, * architecture dependent, fields. */ typedef struct { } PALConfig; /** * @brief Width, in bits, of an I/O port. */ #define PAL_IOPORTS_WIDTH 32 /** * @brief Whole port mask. * @brief 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. * @details This type can be a scalar or some kind of pointer, do not make * any assumption about it, use the provided macros when populating * variables of this type. */ typedef uint32_t ioportid_t; /*===========================================================================*/ /* I/O Ports Identifiers. */ /*===========================================================================*/ /** * @brief First I/O port identifier. * @details Low level drivers can define multiple ports, it is suggested to * use this naming convention. */ #define IOPORT1 0 /*===========================================================================*/ /* Implementation, some of the following macros could be implemented as */ /* functions, if so please put them in pal_lld.c. */ /*===========================================================================*/ /** * @brief Low level PAL subsystem initialization. * * @param[in] config architecture-dependent ports configuration * * @notapi */ #define pal_lld_init(config) _pal_lld_init(config) /** * @brief Reads the physical I/O port states. * * @param[in] port port identifier * @return The port bits. * * @notapi */ #define pal_lld_readport(port) 0 /** * @brief Reads the output latch. * @details The purpose of this function is to read back the latched output * value. * * @param[in] port port identifier * @return The latched logical states. * * @notapi */ #define pal_lld_readlatch(port) 0 /** * @brief Writes a bits mask on a I/O port. * * @param[in] port port identifier * @param[in] bits bits to be written on the specified port * * @notapi */ #define pal_lld_writeport(port, bits) /** * @brief Sets a bits mask on a I/O port. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * * @param[in] port port identifier * @param[in] bits bits to be ORed on the specified port * * @notapi */ #define pal_lld_setport(port, bits) /** * @brief Clears a bits mask on a I/O port. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * * @param[in] port port identifier * @param[in] bits bits to be cleared on the specified port * * @notapi */ #define pal_lld_clearport(port, bits) /** * @brief Toggles a bits mask on a I/O port. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * * @param[in] port port identifier * @param[in] bits bits to be XORed on the specified port * * @notapi */ #define pal_lld_toggleport(port, bits) /** * @brief Reads a group of bits. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * * @param[in] port port identifier * @param[in] mask group mask * @param[in] offset group bit offset within the port * @return The group logical states. * * @notapi */ #define pal_lld_readgroup(port, mask, offset) 0 /** * @brief Writes a group of bits. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * * @param[in] port port identifier * @param[in] mask group mask * @param[in] offset 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) (void)bits /** * @brief Pads group mode setup. * @details This function programs a pads group belonging to the same port * with the specified mode. * @note Programming an unknown or unsupported mode is silently ignored. * * @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 Reads a logical state from an I/O pad. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * * @param[in] port port identifier * @param[in] pad pad number within the port * @return The logical state. * @retval PAL_LOW low logical state. * @retval PAL_HIGH high logical state. * * @notapi */ #define pal_lld_readpad(port, pad) PAL_LOW /** * @brief Writes a logical state on an output pad. * @note This function is not meant to be invoked directly by the * application code. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * * @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) /** * @brief Sets a pad logical state to @p PAL_HIGH. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * * @param[in] port port identifier * @param[in] pad pad number within the port * * @notapi */ #define pal_lld_setpad(port, pad) /** * @brief Clears a pad logical state to @p PAL_LOW. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * * @param[in] port port identifier * @param[in] pad pad number within the port * * @notapi */ #define pal_lld_clearpad(port, pad) /** * @brief Toggles a pad logical state. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * * @param[in] port port identifier * @param[in] pad pad number within the port * * @notapi */ #define pal_lld_togglepad(port, pad) /** * @brief Pad mode setup. * @details This function programs a pad with the specified mode. * @note The @ref PAL provides a default software implementation of this * functionality, implement this function if can optimize it by using * special hardware functionalities or special coding. * @note Programming an unknown or unsupported mode is silently ignored. * * @param[in] port port identifier * @param[in] pad pad number within the port * @param[in] mode pad mode * * @notapi */ #define pal_lld_setpadmode(port, pad, mode) #if !defined(__DOXYGEN__) extern const PALConfig pal_default_config; #endif #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_ */ /** @} */