Jeffrey Vitale wrote:
> I am able to get an a2d value from my 877 chip reding value from a
> potentiometer connected to chip (using chips vdd as vref). after i put
> the value's from ADRESH into a user register (via W of course) i
> perform an ADDWF where W=D'55' to see whether or not the A2d value is
> greater than 200 or not (this is my threshold level i am interested
> in). the strange thing is that the STATUS carry bit (bit 0) does not
> stay at 1 like it should when the user register is 201 and greater.
> using leds, i am able to verify that the status bit will only show a
> MSB carry when the user register is of the following values:
> 201 through 207
> 217 through 231
> 247 through 255

I don't believe this.  You won't get anywhere until you assume the chip is
working correctly and that there is a bug in your code.  Something else is
going on than you think, but you won't be able to find it until you have
the right mindset.


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