Contiki 2.6

utils.h

00001 /*
00002  * Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
00003  * to the MC1322x project (http://mc1322x.devl.org)
00004  * All rights reserved.
00005  *
00006  * Redistribution and use in source and binary forms, with or without
00007  * modification, are permitted provided that the following conditions
00008  * are met:
00009  * 1. Redistributions of source code must retain the above copyright
00010  *    notice, this list of conditions and the following disclaimer.
00011  * 2. Redistributions in binary form must reproduce the above copyright
00012  *    notice, this list of conditions and the following disclaimer in the
00013  *    documentation and/or other materials provided with the distribution.
00014  * 3. Neither the name of the Institute nor the names of its contributors
00015  *    may be used to endorse or promote products derived from this software
00016  *    without specific prior written permission.
00017  *
00018  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00019  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00020  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00021  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00022  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00023  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00024  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00025  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00026  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00027  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00028  * SUCH DAMAGE.
00029  *
00030  * This file is part of libmc1322x: see http://mc1322x.devl.org
00031  * for details. 
00032  *
00033  *
00034  */
00035 
00036 #ifndef UTILS_H
00037 #define UTILS_H
00038 
00039 #define mem32(x) ((volatile uint32_t *)(x))
00040 #define mem16(x) ((volatile uint16_t *)(x))
00041 
00042 #define CAT2(x, y, z)  x##y##z
00043 
00044 #define STR(x) #x
00045 #define STR2(x) STR(x)
00046 
00047 #define bit(bit) (1 << bit)
00048 #define bit_is_set(val, bit) (((val & (1 << bit)) >> bit) == 1)
00049 #define clear_bit(val, bit)  (val = (val & ~(1 << bit)))
00050 #define set_bit(val, bit)  (val = (val | (1 << bit)))
00051 
00052 #define ones(num) ( (1ULL << num) - 1 )
00053 #define bit_mask(length, shift) (ones(length) << shift)
00054 #define get_field(val, field) ((val & field##_MASK) >> field)
00055 //#define bitfield(name, length, shift) ( #define #name length  #define #name##_MASK bit_mask(length, shift))
00056 #define bitfield(name, length, shift) ( define #name length )
00057 
00058 #endif /* UTILS_H */