Bit Range Constants

Chuck Rice

I think that the answer to my question is "It cannot be done: SPIN limitation", but I thought that I would ask.

What I would like to do is setup a CONstant:

CON
    digitalInputsBasePin = 8
    digitalInputsRange   = digitalInputsBasePin..digitalInputsBasePin+8

VAR
    long digitalInputs
PUB  xxx(yyy)

   digitalInputs  := INA(digitalInputsRange)

I know that I can do

digitalInputs := INA(8..15)

but that hides those pins down in the code. Bad programming practice.
Or I could read them a bit at a time, but I would rather read all 8 bits at once.

Post Edited (Chuck Rice) : 4/17/2009 2:43:20 AM GMT

Phil Pilgrim (PhiPi)

What would be wrong with:

CON
    digitalInputsBasePin = 8
    digitalInputsHiPin  = digitalInputsBasePin+7

VAR
    long digitalInputs
PUB  xxx(yyy)

   digitalInputs  := INA[noparse][[/noparse]digitalInputsBasePin..digitalInputsHiPin]

-Phil

Chuck Rice

Duh... Thanks Phil. I thought I tried that and it did not work. I must have misread the error.