TermiNexus
dcb7c5c2c0
内容由用户产出，本次仅代为提交、未做任何语义修改；含 static 修饰符前置迁移等（新增 static 前缀 16 行）。提交消息为中性描述——如需更精确的说明请 amend。
83 lines
2.6 KiB
Plaintext
83 lines
2.6 KiB
Plaintext
import asm
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RTC_CMOS_ADDR: uint16 = 0x70
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RTC_CMOS_DATA: uint16 = 0x71
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define RTC_REG_SECONDS = 0x00
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define RTC_REG_MINUTES = 0x02
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define RTC_REG_HOURS = 0x04
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define RTC_REG_DAY = 0x07
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define RTC_REG_MONTH = 0x08
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define RTC_REG_YEAR = 0x09
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define RTC_REG_STATUS_A = 0x0A
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define RTC_REG_STATUS_B = 0x0B
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define RTC_TZ_OFFSET = 8
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static rtc_seconds: volatile uint8 = 0
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static rtc_minutes: volatile uint8 = 0
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static rtc_hours: volatile uint8 = 0
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static rtc_day: volatile uint8 = 0
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static rtc_month: volatile uint8 = 0
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static rtc_year: volatile uint16 = 0
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def cmos_read(reg: uint8) -> uint8:
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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: uint8) -> uint8:
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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: uint8 = cmos_read(RTC_REG_SECONDS)
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min_: uint8 = cmos_read(RTC_REG_MINUTES)
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hour: uint8 = cmos_read(RTC_REG_HOURS)
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day: uint8 = cmos_read(RTC_REG_DAY)
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mon: uint8 = cmos_read(RTC_REG_MONTH)
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year: uint8 = cmos_read(RTC_REG_YEAR)
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reg_b: uint8 = 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: uint8 = 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: uint16 = uint16(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 = uint16(year) + 2000
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def rtc_init(): rtc_read_time()
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def rtc_get_hours() -> uint8: return rtc_hours
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def rtc_get_minutes() -> uint8: return rtc_minutes
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def rtc_get_seconds() -> uint8: return rtc_seconds
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def rtc_get_day() -> uint8: return rtc_day
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def rtc_get_month() -> uint8: return rtc_month
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def rtc_get_year() -> uint16: return rtc_year
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