What is a microcontroller? Page 81

Bibliophile6

The code for this set up:

near the:·········· IF (IN3 = 1) THEN··················

·· I get an error message when running that says, "Expected a label."







What exactly does it want me to do?

Mike Green

You may not have entered the program correctly. There are two variations of the IF/THEN statement. One expects a label after the THEN. The other expects a line with an ENDIF (or ELSE) to follow. Look in the PBasic Manual under the IF statement for examples and a discussion of syntax.

Bibliophile6

' {$STAMP BS2}
' What's a Microcontroller - PushbuttonControlledLed.bs2
' Check pushbutton state 10 times per second and blink LED when pressed.

' {PBASIC 2.5}
DO
· DEBUG HOME
· DEBUG ? IN4
· DEBUG ? IN3
· IF (IN3 = 1) THEN
··· HIGH 14
··· PAUSE 50
· ELSEIF (IN4 =1) THEN
··· HIGH 15
··· PAUSE 50
· ELSE
··· PAUSE 50
· ENDIF
· LOW 14
· LOW 15
· PAUSE 50
LOOP

Mike Green

You need a "$" in front of the "PBASIC". Otherwise, it looks just like an ordinary comment. Without the "{$PBASIC 2.5}", the compiler thinks you're using PBasic 2.0 which does not allow the multi-line IF/THEN statement.

Bibliophile6

oh! Thank you [noparse]:)[/noparse]

It is allways the most simple things that can be the problem. Sorry about that.

Steph Lindsay

I've done that!·

You can spare yourself the typing (and typos) by inserting those directives with the toolbar buttons, as on page 21.·

-Stephanie Lindsay

Editor, Parallax Inc.