Need some help with BS2 syntax - IF...THEN

Otaku1031 · 2011-01-07 17:10

Hi all,
I'm having some difficulty with getting this sequence to work:
I'm using pin 12 as an input for a logic signal from a CD4070 gate. I need to look at this signal, determine if it's 0 or 1, and take the appropriate action. If the signal is 1 (indicating a test failure) I want to make pin 13 high to turn on an LED. Here's what the code looks like right now:

IF IN12 = 1 THEN OUT13 = 1
END IF

When I check syntax, I keep getting errror msg's like "Expected: Label". I've been using Excel VBA for > 10 years, but this is my first exposure to PBASIC. I can't seem to find a code example anywhere that shows how to turn a pin ON based on the input (high/low) to a different pin. I have pin 12 defined as an input and 13 defined as an output. Can anyone point me in the right direction? Many thanks!

Gary

W9GFO · 2011-01-07 17:24

When your IF Statement is completed in one line you do not need the ENDIF.

Also, ENDIF is one word.

Rich H

Otaku1031 · 2011-01-07 18:15

Thanks, Rich. I was able to get the Syntax Check to accept this:

IF IN12 = 1 THEN Fail_LED
END

Fail_LED:
HIGH 13
END

I may stick with this, as I'll need to reference Fail_LED several times in this program. I'll test your suggestion first thing when I get back to work. Thanks again!

W9GFO · 2011-01-07 19:43

"END" belongs only at the end of the program. You do not need to "end" the IF statement if it takes only one line.

This needs an ENDIF;

IF a = 1 THEN
b = a + 1
GOSUB somethingElse
PAUSE 10
ENDIF

This does not need an ENDIF;

IF a = 1 THEN GOSUB somethingElse

Rich H

Otaku1031 · 2011-01-07 20:11

Aha! Hey, thanks again. This will make things go faster.

erco · 2011-01-08 08:43

If in12=1 then high 13

Tracy Allen · 2011-01-08 09:43

Or simply, assuming p13 has already been made an output,

out13 = in12

erco · 2011-01-08 21:47

@Tracy: Molto elegante!

Spiral_72 · 2011-01-09 21:10

Yessir, that "END" command stops everything..... as in, the micro does absolutely nothing else unless you cycle power (reset) and force a program restart. So in the example you give, the program will perform the check and in either case (True/false) it stops execution. This may be exactly what you intended, but I imagine you'll need some kind of a branch function too, GOSUB or GOTO

Need some help with BS2 syntax - IF...THEN

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