39 lines
947 B
C
39 lines
947 B
C
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#include "time.h"
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#include "../drivers/ports.h"
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// Check whether CMOS is updated or not
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static uint8_t is_cmos_updated() {
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outb(CMOS_ADDRESS, 0x0A);
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return (inb(CMOS_DATA) & 0x80);
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}
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// Get CMOS register's status
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static uint8_t reg_status(int32_t reg) {
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outb(CMOS_ADDRESS, reg);
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return inb(CMOS_DATA);
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}
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time_t cmos_reader() {
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while(is_cmos_updated()); // Wait until the CMOS is being updated
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time_t tm;
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tm.second = BCD_CONVERTER(reg_status(TIME_R_SECOND));
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tm.minute = BCD_CONVERTER(reg_status(TIME_R_MINUTE));
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tm.hour = BCD_CONVERTER(reg_status(TIME_R_HOUR));
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tm.day = BCD_CONVERTER(reg_status(TIME_R_DAY));
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tm.month = BCD_CONVERTER(reg_status(TIME_R_MONTH));
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tm.year = BCD_CONVERTER(reg_status(TIME_R_YEAR));
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return tm;
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}
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uint32_t get_time(uint32_t field) {
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while(is_cmos_updated()); // Wait the CMOS is being updated
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return BCD_CONVERTER(reg_status(field));
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}
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