sorry falsch kpiert. so müsste es sein

Setdate:
_day = Makebcd(_day) : _month = Makebcd(_month) : _year = Makebcd(_year)
I2cstart ' Generate start code
I2cwbyte Ds1307w ' send address
I2cwbyte 4 ' starting address in 1307
I2cwbyte _day ' Send Data to SECONDS
I2cwbyte _month ' MINUTES
I2cwbyte _year ' Hours
I2cstop

I2cstart
I2cwbyte Ds1307w
I2cwbyte 3
I2cwbyte Weekday
I2cwbyte _day
I2cwbyte _month
I2cwbyte _year
I2cstop
Return

Settime:
_sec = Makebcd(_sec) : _min = Makebcd(_min) : _hour = Makebcd(_hour)
I2cstart ' Generate start code
I2cwbyte Ds1307w ' send address
I2cwbyte 0 ' starting address in 1307
I2cwbyte _sec ' Send Data to SECONDS
I2cwbyte _min ' MINUTES
I2cwbyte _hour ' Hours
I2cstop
Return