BasicMicro - Forums

Do While used to work just fine under M Basic in a 16F887. I ported the code to the Nano 40 and even though it compiles just fine, it doesn't run. A search of the forums doesn't find any reference to anyone using Do While.
I turn on a motor that moves a carriage to a home position. Once home, an optical sensor tells the nano40 to turn off the motor.

do
low p27 ;run the comp motor
while p28=0 ;wait for home switch
high p27 ;turn the motor off



Has anyone using Studio used Do..While ?
Pete

Try this:


Studio doesn't seem to read P-pins directly, you have to use the IN(P#).
kenjj

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kenjj
http://blog.basicmicro.com/
http://kjennejohn.wordpress.com/

As usual, Ken, has the answer. I thought that might be the case but I didn't think about using IN.
It is working fine now.
Thanks
Pete

Just to point out no version of MBasic has ever read P pins. P pins are constant numbers that are only used with commands that take a pin number. So in effect you were waiting on a constant to change.

Also another way of writing your code. You don't need the intermediate variable. IN variables are variables.

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Nathan Scherdin
Basic Micro - Robotic Technology Evolved