Incrementing outputs

Archiver

Hi,

I have a few outputs with LEDs connected to them, and I would like to
be able to set the LEDs to every possible state of being on or off by
incrementing a 4 bit counter. This way I can have a visual
representation of what phase my BS2SX program is in.

I have 4 LED's and I want the lights to all be off first
0 0 0 0
Then I want to increment the lights by one
0 0 0 1
and again
0 0 1 0
and again
0 0 1 1
and so on until I get to the highest incremented value (16) which is
1 1 1 1

I know there must be a slick way to do this. Can somebody tell me
what it is?

Thanks,
/John

Archiver

The BASIC Stamp make this a BREEZE! Assuming you have a BS2....

' {$STAMP BS2}

Leds VAR OUTA ' Leds on P0 - P3; active high

Setup:
DIRA = %1111 ' make pins outputs

Test:
Leds = Leds + 1 ' increment LEDs value
PAUSE 1000 ' 1 second to view
GOTO Test ' loop forever


This works because the PIC/SX architecture allows us to treat IO pins
like variables, and the Stamp very cleverly defines pins individually
and in groups. I will let you read the manual (hint, hint) to figure
out how the program works.

-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office

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Original Message

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From: John Schwab [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=3xD1jQw8HI2wEsA5_T6UkVtHge4PDHorYS6yHM3C0HWgSns3xO2xIyj_LXVBtu2EeMMJ0jwU7_9F6IIVplk]johnschwab5678@y...[/url
Sent: Wednesday, November 05, 2003 5:33 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Incrementing outputs


Hi,

I have a few outputs with LEDs connected to them, and I would like to
be able to set the LEDs to every possible state of being on or off by
incrementing a 4 bit counter. This way I can have a visual
representation of what phase my BS2SX program is in.

I have 4 LED's and I want the lights to all be off first
0 0 0 0
Then I want to increment the lights by one
0 0 0 1
and again
0 0 1 0
and again
0 0 1 1
and so on until I get to the highest incremented value (16) which is 1 1
1 1

I know there must be a slick way to do this. Can somebody tell me
what it is?

Thanks,
/John



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