98 lines
2.7 KiB
Python
98 lines
2.7 KiB
Python
from stdint import *
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import t, c
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import asm
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RTC_CMOS_ADDR: t.CUInt16T = 0x70
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RTC_CMOS_DATA: t.CUInt16T = 0x71
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RTC_REG_SECONDS: t.CDefine = 0x00
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RTC_REG_MINUTES: t.CDefine = 0x02
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RTC_REG_HOURS: t.CDefine = 0x04
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RTC_REG_DAY: t.CDefine = 0x07
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RTC_REG_MONTH: t.CDefine = 0x08
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RTC_REG_YEAR: t.CDefine = 0x09
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RTC_REG_STATUS_A: t.CDefine = 0x0A
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RTC_REG_STATUS_B: t.CDefine = 0x0B
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RTC_TZ_OFFSET: t.CDefine = 8
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rtc_seconds: t.CStatic | t.CVolatile | t.CUInt8T = 0
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rtc_minutes: t.CStatic | t.CVolatile | t.CUInt8T = 0
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rtc_hours: t.CStatic | t.CVolatile | t.CUInt8T = 0
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rtc_day: t.CStatic | t.CVolatile | t.CUInt8T = 0
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rtc_month: t.CStatic | t.CVolatile | t.CUInt8T = 0
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rtc_year: t.CStatic | t.CVolatile | t.CUInt16T = 0
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def cmos_read(reg: t.CUInt8T) -> t.CUInt8T:
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asm.outb(RTC_CMOS_ADDR, reg)
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return asm.inb(RTC_CMOS_DATA)
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def bcd_to_bin(bcd: t.CUInt8T) -> t.CUInt8T:
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return (bcd >> 4) * 10 + (bcd & 0x0F)
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def rtc_read_time():
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while cmos_read(RTC_REG_STATUS_A) & 0x80: pass
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sec: t.CUInt8T = cmos_read(RTC_REG_SECONDS)
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min_: t.CUInt8T = cmos_read(RTC_REG_MINUTES)
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hour: t.CUInt8T = cmos_read(RTC_REG_HOURS)
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day: t.CUInt8T = cmos_read(RTC_REG_DAY)
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mon: t.CUInt8T = cmos_read(RTC_REG_MONTH)
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year: t.CUInt8T = cmos_read(RTC_REG_YEAR)
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reg_b: t.CUInt8T = cmos_read(RTC_REG_STATUS_B)
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if not (reg_b & 0x04):
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sec = bcd_to_bin(sec)
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min_ = bcd_to_bin(min_)
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hour = bcd_to_bin(hour)
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day = bcd_to_bin(day)
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mon = bcd_to_bin(mon)
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year = bcd_to_bin(year)
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if not (reg_b & 0x02) and (hour & 0x80):
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hour = ((hour & 0x7F) + 12) % 24
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hour = hour + RTC_TZ_OFFSET
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if hour >= 24:
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hour = hour - 24
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day = day + 1
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max_day: t.CUInt8T = 31
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if mon == 4 or mon == 6 or mon == 9 or mon == 11:
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max_day = 30
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elif mon == 2:
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max_day = 28
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y4: t.CUInt16T = t.CUInt16T(year) + 2000
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if (y4 % 4 == 0 and y4 % 100 != 0) or (y4 % 400 == 0):
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max_day = 29
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if day > max_day:
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day = 1
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mon = mon + 1
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if mon > 12:
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mon = 1
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year = year + 1
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global rtc_seconds, rtc_minutes, rtc_hours, rtc_day, rtc_month, rtc_year
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rtc_seconds = sec
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rtc_minutes = min_
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rtc_hours = hour
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rtc_day = day
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rtc_month = mon
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rtc_year = t.CUInt16T(year) + 2000
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def rtc_init():
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rtc_read_time()
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def rtc_get_hours() -> t.CUInt8T:
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return rtc_hours
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def rtc_get_minutes() -> t.CUInt8T:
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return rtc_minutes
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def rtc_get_seconds() -> t.CUInt8T:
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return rtc_seconds
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def rtc_get_day() -> t.CUInt8T:
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return rtc_day
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def rtc_get_month() -> t.CUInt8T:
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return rtc_month
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def rtc_get_year() -> t.CUInt16T:
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return rtc_year
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