On Nov 28, 2005, at 4:42 PM, Andre Abelian wrote:

>      output_bit(PS2_DATA_OUT, shift_left(data,1,0));
>

I'm not familiar with the specifics of CCS, but...

What is shift_left supposed to do, beyond "data = data<<1", and
are you sure it is appropriate here?

And does output_bit() output the low order bit, high order bit, or
boolean of its second argument?  (unless it's the high order bit,
which seems unlikely (not C-like), then this isn't going to do what
it probably needs to do for serial-like communications...)

Finally, though I guess you're not there yet, it seems to me that
this code is somewhat likely to execute too fast for reliable
communications with most PC-like PS2 devices/computers.  You'll
probably need a delay before toggling the clock bit...

BillW
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