104 lines
2.6 KiB
Python
104 lines
2.6 KiB
Python
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import sys
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import time
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import wiringpi
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#from wiringpi import GPIO
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I2C_ADDR = 0x68
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def b2s(bcd, mask):
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bcd &= mask
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b1 = bcd & 0x0F
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b2 = ((bcd >> 4) & 0x0F)*10
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return b1 + b2
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def decCompensation(units):
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unitsU = units%10
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if units >= 50:
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units = 0x50 + unitsU
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elif units >= 40:
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units = 0x40 + unitsU
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elif units >= 30:
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units = 0x30 + unitsU
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elif units >= 20:
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units = 0x20 + unitsU
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elif units >= 10:
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units = 0x10 + unitsU
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return units
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def getHours():
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HH = time.strftime("%H")
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return decCompensation(int(HH))
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def getMins():
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MM = time.strftime("%M")
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return decCompensation(int(MM))
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def getSecs():
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SS = time.strftime("%S")
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return decCompensation(int(SS))
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def getWeeks():
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WW = time.strftime("%w")
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return decCompensation(int(WW))
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def getDays():
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DD = time.strftime("%d")
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return decCompensation(int(DD))
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def getMons():
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MON = time.strftime("%m")
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return decCompensation(int(MON))
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def getYear():
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YY = time.strftime("%Y")
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return decCompensation(int(YY))
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def clear_register(fd):
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wiringpi.wiringPiI2CWriteReg8(fd, 0x02, 0b0) # hours
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wiringpi.wiringPiI2CWriteReg8(fd, 0x01, 0b0) # mins
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wiringpi.wiringPiI2CWriteReg8(fd, 0x00, 0b10000000) # secs
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wiringpi.wiringPiI2CWriteReg8(fd, 0x03, 0b0) # weeks
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wiringpi.wiringPiI2CWriteReg8(fd, 0x04, 0b0) # days
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wiringpi.wiringPiI2CWriteReg8(fd, 0x05, 0b0) # mons
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def sys2rtcSet(fd):
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wiringpi.wiringPiI2CWriteReg8(fd, 0x02, getHours())
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wiringpi.wiringPiI2CWriteReg8(fd, 0x01, getMins())
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wiringpi.wiringPiI2CWriteReg8(fd, 0x00, getSecs()+0b10000000)
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wiringpi.wiringPiI2CWriteReg8(fd, 0x03, getWeeks())
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wiringpi.wiringPiI2CWriteReg8(fd, 0x04, getDays())
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wiringpi.wiringPiI2CWriteReg8(fd, 0x05, getMons())
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wiringpi.wiringPiI2CWriteReg8(fd, 0x06, getYear())
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def read_register(fd):
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secs = b2s(wiringpi.wiringPiI2CReadReg8(fd, 0x00), 0x7F)
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mins = b2s(wiringpi.wiringPiI2CReadReg8(fd, 0x01), 0x7F)
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hours = b2s(wiringpi.wiringPiI2CReadReg8(fd, 0x02) - 0b10000000, 0x3F)
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week = b2s(wiringpi.wiringPiI2CReadReg8(fd, 0x03), 0x3F)
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day = b2s(wiringpi.wiringPiI2CReadReg8(fd, 0x04), 0x1F)
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mon = b2s(wiringpi.wiringPiI2CReadReg8(fd, 0x05), 0x07)
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year = b2s(wiringpi.wiringPiI2CReadReg8(fd, 0x06), 0xFF) + 1970
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print("week:%d mon:%d day:%d hours:%d mins:%d secs:%d year:%d"%(week,mon,day,hours,mins,secs,year))
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def main():
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wiringpi.wiringPiSetup()
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fd = wiringpi.wiringPiI2CSetup(I2C_ADDR)
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if not fd:
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return False;
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while True:
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try:
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# clear RTC Register
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clear_register(fd)
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# set sys time to RTC Register
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sys2rtcSet(fd)
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# read RTC Register
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read_register(fd)
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time.sleep(1)
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except KeyboardInterrupt:
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print("\nexit")
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sys.exit(0)
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if __name__ == '__main__':
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main()
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