1 /* 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 */ 21