ABOUT "DO WHILE..LOOP" for PropBASIC

caskaz

Hi, everyone.

I think that logic is reverse on "DO WHILE..LOOP" for PropBASIC.
I think P16 is on when P0 = low below;
But P16 is on when P0 = high.
Same as DO UNTIL...LOOP.
My mistake?

....
....
P0 PIN 0
P16 PIN 16 LOW
Main:
 P16 = 0
 DO WHILE P0 = 0
    P16 = 1
 LOOP
...

Post Edited (caskaz) : 3/29/2010 4:15:58 AM GMT

JonnyMac

What's the question? You're not showing the code after the loop so it's hard to give evaluate your program.

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Jon McPhalen
Hollywood, CA

caskaz

Sorry, I thought whole program don't need.

DEVICE P8X32A,XTAL1,PLL16X
XIN 5_000_000
P0 PIN 0
P16 PIN 16 LOW

Program Start
Start:
Main:
  P16 = 0
  DO WHILE P0 = 0
    P16 = 1
  LOOP
 GOTO Main

 END

I think that P16 = 1 during P0 = low.
But P16 is on during P0 = high.
I think logic is reverse.

My thinking is wrong?

Post Edited (caskaz) : 3/29/2010 10:59:00 AM GMT

JonnyMac

Looking at the compiled output I would tend to agree -- there seems to be a logic reversal; Bean can fix that quite easily. Another solution is a different bit of code:

Main:
  P16 = ~P0
  GOTO Main

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Jon McPhalen
Hollywood, CA

TonyWaite

I'm glad to find that there's a bug in the compiler, because I expected this code to work too!

T o n y

Bean

Yeah, I'm looking to the problem.
It should be corrected in the next release of PropBASIC.

Bean

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Use BASIC on the Propeller with the speed of assembly language.

PropBASIC thread http://forums.parallax.com/showthread.php?p=867134

March 2010 Nuts and Volts article·http://www.parallax.com/Portals/0/Downloads/docs/cols/nv/prop/col/nvp5.pdf
·

caskaz

Bean, Thanks.
I wait to expect next release.

Bean

The problem posted above has been fixed in the latest release of PropBASIC available here http://www.fnarfbargle.com/PropBasic/

Bean

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Use BASIC on the Propeller with the speed of assembly language.
PropBASIC thread http://forums.parallax.com/showthread.php?p=867134

March 2010 Nuts and Volts article·http://www.parallax.com/Portals/0/Downloads/docs/cols/nv/prop/col/nvp5.pdf
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There are two rules in life:
· 1) Never divulge all information

caskaz

Bean, Thanks.