84 lines
1.3 KiB
C++
84 lines
1.3 KiB
C++
// rtc.c
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// Author: Josh Holtrop
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// Created: 02/26/04
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// Implements Real-Time Clock function calls
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// These functions are for reading and writing various values stored on the CMOS Real Time Clock
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// Parameters / return values are in BCD format
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#include "hos_defines.h"
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#include "rtc.h"
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#include "sys/io.h"
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unsigned char rtc_readDay()
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{
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outportb(0x70, 7);
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return inportb(0x71);
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}
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unsigned char rtc_readMonth()
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{
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outportb(0x70, 8);
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return inportb(0x71);
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}
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unsigned char rtc_readYear()
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{
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outportb(0x70, 9);
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return inportb(0x71);
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}
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unsigned char rtc_readSecond()
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{
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outportb(0x70, 0);
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return inportb(0x71);
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}
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unsigned char rtc_readMinute()
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{
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outportb(0x70, 2);
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return inportb(0x71);
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}
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unsigned char rtc_readHour()
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{
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outportb(0x70, 4);
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return inportb(0x71);
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}
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void rtc_setDay(unsigned char day)
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{
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outportb(0x70, 7);
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outportb(0x71, day);
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}
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void rtc_setMonth(unsigned char month)
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{
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outportb(0x70, 8);
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outportb(0x71, month);
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}
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void rtc_setYear(unsigned char year)
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{
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outportb(0x70, 9);
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outportb(0x71, year);
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}
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void rtc_setSecond(unsigned char second)
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{
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outportb(0x70, 0);
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outportb(0x71, second);
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}
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void rtc_setMinute(unsigned char minute)
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{
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outportb(0x70, 2);
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outportb(0x71, minute);
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}
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void rtc_setHour(unsigned char hour)
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{
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outportb(0x70, 4);
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outportb(0x71, hour);
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}
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