/* ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, 2011 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 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_ */ /** @} */