m48t35.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- /*
- * Registers for the SGS-Thomson M48T35 Timekeeper RAM chip
- */
- #ifndef _ASM_M48T35_H
- #define _ASM_M48T35_H
- struct m48t35_rtc {
- volatile u8 pad[0x7ff8]; /* starts at 0x7ff8 */
- volatile u8 control;
- volatile u8 sec;
- volatile u8 min;
- volatile u8 hour;
- volatile u8 day;
- volatile u8 date;
- volatile u8 month;
- volatile u8 year;
- };
- #define M48T35_RTC_SET 0x80
- #define M48T35_RTC_STOPPED 0x80
- #define M48T35_RTC_READ 0x40
- #ifndef BCD_TO_BIN
- #define BCD_TO_BIN(x) ((x)=((x)&15) + ((x)>>4)*10)
- #endif
- #ifndef BIN_TO_BCD
- #define BIN_TO_BCD(x) ((x)=(((x)/10)<<4) + (x)%10)
- #endif
- #endif