On Tuesday 24 February 2004 12:24 am, Ken Pergola scribbled:
> I don't see anywhere in your code where you are clearing bit 7 of EEADR=
 --
> it should be set to zero for the device you are using.

It defaults to this when I set the address into the W before calling the=20
EEPROM-write routine.

> Are you ANDing the W register (EEPROM address) with 0x7F before calling
> your write routine?

Not specifically, but I just tried that, and no change.


> Also, it might be better to re-enable interrupts only if they were
> previously enabled when you entered the EEPROM write routine instead of
> unconditionally enabling them. It might not matter in this specific
> application of yours, but this might be something that will bite you in=
 the
> future.

Good idea.  Unfortunately for this app, they must always be enabled,


> Perhaps you could toggle an I/O pin in your write routine and 'scope to=
 see
> if you are actually getting stuck there.

Holding off on this for now, since all pins are in use, and the circuit i=
s on=20
a PCB already.  Luckily I socketed the chip.


Much thanks,
-Neil.

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