git.zerfleddert.de Git - fnordlicht-mini/blob - firmware/common/common.h

   1 /* vim:ts=4 sts=4 et tw=80
   2  *
   3  *         fnordlicht firmware
   4  *
   5  *    for additional information please
   6  *    see http://lochraster.org/fnordlichtmini
   7  *
   8  * (c) by Alexander Neumann <alexander@bumpern.de>
   9  *     Lars Noschinski <lars@public.noschinski.de>
  10  *
  11  * This program is free software: you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License version 3 as published by
  13  * the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but WITHOUT
  16  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18  * more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along with
  21  * this program.  If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #ifndef COMMON_H
  25 #define COMMON_H
  26
  27 #include <stdint.h>
  28
  29 /* macros for extracting low and high byte */
  30 #define LO8(x) (uint8_t)(0x00ff & (x))
  31 #define HI8(x) (uint8_t)((0xff00 & (x)) >> 8)
  32
  33 /* macros for concatenating PORT, PIN and DDR */
  34 #define _CONCAT(a, b)            a ## b
  35 #define _OUTPORT(name)           _CONCAT(PORT, name)
  36 #define _INPORT(name)            _CONCAT(PIN, name)
  37 #define _DDRPORT(name)           _CONCAT(DDR, name)
  38 #define _PCIE(name)              _CONCAT(PCIE, name)
  39 #define _PCIF(name)              _CONCAT(PCIF, name)
  40 #define _PCMSK(name)             _CONCAT(PCMSK, name)
  41 #define _PCINT(name)             _CONCAT(PCINT, name)
  42
  43 /* __noinline attribute (opposite of inline attribute */
  44 #define __noinline __attribute__((noinline))
  45
  46 /* structure for accessing bytes and words in an uint32_t */
  47 union uint32_t_access {
  48     uint8_t bytes[4];
  49     uint16_t words[2];
  50     uint32_t raw;
  51 };
  52
  53 #endif