blob: c545308125b0904a070e3cccd611f83ff37b71e1 [file] [log] [blame]
Stefan Roese758c0372007-10-21 08:16:12 +02001/* Permission is hereby granted to copy, modify and redistribute this code
2 * in terms of the GNU Library General Public License, Version 2 or later,
3 * at your option.
4 */
5
6/* macros to translate to/from binary and binary-coded decimal (frequently
7 * found in RTC chips).
8 */
9
10#ifndef _BCD_H
11#define _BCD_H
12
13#define BCD2BIN(val) (((val) & 0x0f) + ((val)>>4)*10)
14#define BIN2BCD(val) ((((val)/10)<<4) + (val)%10)
15
16/* backwards compat */
17#define BCD_TO_BIN(val) ((val)=BCD2BIN(val))
18#define BIN_TO_BCD(val) ((val)=BIN2BCD(val))
19
20#endif /* _BCD_H */