From f9ecd9f46e829010b0457a04993d2a89a37c104a Mon Sep 17 00:00:00 2001 From: gdisirio Date: Sun, 7 Jun 2009 16:11:41 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1024 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- ports/ARM7-LPC214x/pal_lld.h | 189 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 189 insertions(+) create mode 100644 ports/ARM7-LPC214x/pal_lld.h (limited to 'ports/ARM7-LPC214x/pal_lld.h') diff --git a/ports/ARM7-LPC214x/pal_lld.h b/ports/ARM7-LPC214x/pal_lld.h new file mode 100644 index 000000000..ce56f9562 --- /dev/null +++ b/ports/ARM7-LPC214x/pal_lld.h @@ -0,0 +1,189 @@ +/* + ChibiOS/RT - Copyright (C) 2006-2007 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 ports/ARM7-LPC214x/ioports_lld.h + * @brief LPC214x FIO low level driver + * @addtogroup LPC214x_PAL + * @{ + */ + +#ifndef _PAL_LLD_H_ +#define _PAL_LLD_H_ + +#ifndef _LPC214X_H_ +#include "lpc214x.h" +#endif + +/*===========================================================================*/ +/* I/O Ports Types and constants. */ +/*===========================================================================*/ + +/** + * @brief Width, in bits, of an I/O port. + */ +#define PAL_IOPORTS_WIDTH 32 + +/** + * @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 IOPORT_A FIO0Base + +/** + * @brief FIO port 1 identifier. + */ +#define IOPORT_B 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() { \ + SCS = 3; \ +} + +/** + * @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 + * + * @note This function is not meant to be invoked directly by the application + * code. + */ +#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. + * + * @note This function is not meant to be invoked directly by the application + * code. + */ +#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 + * + * @note This function is not meant to be invoked directly by the application + * code. + */ +#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 + * + * @note This function is not meant to be invoked directly by the application + * code. + */ +#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 + * + * @note This function is not meant to be invoked directly by the application + * code. + */ +#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 + * @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. + * + * @note This function is not meant to be invoked directly by the application + * code. + */ +#define pal_lld_writegroup(port, mask, offset, bits) { \ + (port)->FIO_MASK = (mask) << (offset); \ + (port)->FIO_PIN = (bits) << (offset); \ + (port)->FIO_MASK = 0; \ +} + +/** + * @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[out] bit the logical value, the value must be @p 0 or @p 1 + * + * @note This function is not meant to be invoked directly by the application + * code. + */ +#define pal_lld_writepad(port, pad, bit) pal_lld_writegroup(port, 1, pad, bit) + +/** + * @brief FIO port setup. + * @details This function initializes a FIO port, note that this functionality + * is LPC214x specific and non portable. + */ +#define pal_lld_lpc214x_set_direction(port, dir) { \ + (port)->FIO_DIR = (dir); \ +} + +#endif /* _PAL_LLD_H_ */ + +/** @} */ -- cgit v1.2.3