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John Brown wrote:
>I am trying to hook a Dallas 1302 Timekeeping chip up to a 16f877. I am
>using PortD 4-6 for the 3-wire interface, and the read/write routines
>available from Dontronic's rtc1302.asm file (appropriately modified to
>work on the pins I have selected). Is there any problems with using these
>routines on a 877? Are there better ones?
>
>My main problem is that I can't seem to get it going, which is always
>annoying! I was wondering if anyone has any ideas? I have confirmed that
>the chip is correctly wired to the correct pins :-) and as far as I can
>tell it is all wired up correctly.

If what way does it not work? Can you read & write the time?
Does the time tick over by itself?  I used the DS1307 a while
ago & you have to set the oscillator bit in one of the registers
to get it running. I don't know if the DS1302 is the same but it
may be worth looking at.
Regards...

___________________________________________
David Duffy        Audio Visual Devices P/L
U8, 9-11 Trade St, Cleveland 4163 Australia
Ph: +61 7 38210362   Fax: +61 7 38210281
New Web: www.audiovisualdevices.com.au
___________________________________________

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