Spin Driver for PCF8563 rtc chip?

Jammer7071

I've seen a few discussions about using these chips, but can't seem to get it running myself.
I tried to modify Kyle Crane's PCF8583 driver but it doesn't run correctly.
Does anyone have a ready made object for this chip?

Peter Jakacki

Why another object? From a register point of view there is not much difference, especially with default values but the slave address is at $A2 vs $A0 for the 8583. Your code may use the 7-bit notation for addresses as %1010000 and if so just change that to %1010001. You might have to make sure that register 0 & 1 have a 0 written to them and mask off the relevant bits when reading the time and date. Since you can't seem to get it running I assume you have read the datasheet? (RTM) Once you have and seen the register bits then the modifications to Spin code are trivial.

Jammer7071

Thank you Peter, you helped me alot.
so far I have found two differences between the chips.
The 8583 is a 4 year counter while the 8563 is 0 to 99.
That also puts the year bytes in a different register.
In the 8583 register $05h holds the date and the year
while the 8563 holds only the year in register $08h
Kyle Crane's PCF8583 driver gets the the date and year
from the same register, so when I run this on the 8563
all I get for the date and year are random junk.
I am still trying to figure it out. how do I split up
the registers in his driver? I'm new to this and thanks
again for your help.

Jammer7071

O.K. I got it now....
Everything I needed to know I got from William Henning's
MorphDiag.spin code.