Pulsout Command To More Than One Pin

Mike Marks

I have a need to send a pulsout to two·pins at a time. I want pulsout to occure simultaneously on both pins. I know I can do it with external circuitry using one pulsout, but want to do it within the Stamp.· Is there a program algorithm you recommend?· I tried the following test program with no luck.· Only P0 would go high.

DirL = % 00001111

x var OutA

loop:
·pulsout x, 60000
·pause 3000
goto loop

Regards,· Mike Marks

Chris Savage

Mike,

·· While you cannot PULSOUT to more than one pin at once, you can effectively PULSE more than one pin at once on a port by doing something like:

Init:
   OUTS = 0                ' All pins LOW
   DIRS = 255              ' All pins outputs
Main:
   PAUSE 3000              ' Wait a few seconds
   OUTA = %1111            ' Make all port A lines HIGH
   PAUSE 5                 ' PAUSE 5mS
   OUTA = %0000            ' Make all port A lines LOW
 
etc.

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Chris Savage
Parallax Tech Support
csavage@parallax.com

allanlane5

You want a 60 mSec pulse?

LOW P0
LOW P1
LOW P2
LOW P3

Main:
OutA = %0011
PAUSE 60
OutA = %0000
PAUSE 3000
GOTO MAIN

Newzed

f you want a very short pause, say 500us, then you can insert this in place of the PAUSE:

pulsout anypin, 250

The BS2 timing increment is 2us so 250 would = 500us.· This is just a dummy command to use up a little time so pick a pin that is not being used for anything.

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Sid Weaver
Do you have a Stamp Tester yet?
http://hometown.aol.com/newzed/index.html

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