PWMPAL pulse accumulator
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Posts: 46,084
Hi All!
I've got a simple circuit - A BS2, and a PWMPAL. I'm feeding a logic
level signal into the PWMPAL, pulsing around once a second, and on for
40% and off for 60% (for all the brains out there...)
I simply want to read into my BS2 as to how many pulses have been
counted since I reset the counter!
At the moment, it's kind of working, in that it's counting the pulses,
but sometimes increments by 2, and even by 3, for only 1 pulse...
If anyone has done anything like this, code you please help out!
Thanks a million for atleast reading my post [noparse];)[/noparse]
Mick
Deakin Uni
Down Under
I've got a simple circuit - A BS2, and a PWMPAL. I'm feeding a logic
level signal into the PWMPAL, pulsing around once a second, and on for
40% and off for 60% (for all the brains out there...)
I simply want to read into my BS2 as to how many pulses have been
counted since I reset the counter!
At the moment, it's kind of working, in that it's counting the pulses,
but sometimes increments by 2, and even by 3, for only 1 pulse...
If anyone has done anything like this, code you please help out!
Thanks a million for atleast reading my post [noparse];)[/noparse]
Mick
Deakin Uni
Down Under
Comments
tested the PWMPAL very thoroughly and feel like with a clean signal it
counts properly. I hope you don't have a duff PWMPAL ... it's a long
way between Oz and Rocklin.
I always have an NX-1000 running on my desk and it has a signal
generator on it, so I modified one of the PWMPAL demo programs for a
quick test -- worked perfectly. Give this a try and see what happens.
Setup:
SEROUT PpPin, PpBaud, [noparse][[/noparse]"!PWMSS", %00000000]
SEROUT PpPin, PpBaud, [noparse][[/noparse]"!PWMSP", %00000001]
Main:
DO
SEROUT PpPin, PpBaud, [noparse][[/noparse]"!PWMX0"]
PAUSE 1000
SEROUT PpPin, PpBaud, [noparse][[/noparse]"!PWMC1"]
SERIN PpPin, PpBaud, [noparse][[/noparse]cntr1.BYTE0, cntr1.BYTE1]
DEBUG CLS, DEC cntr1
LOOP
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: mickwah81 [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=ZZ4n4RS199r2bxyGd3Ws8RutEd048ZsCoEYJIaY-hmAi2VtCaR47epJsrE9JbPweHDQ434xZrSt6-nRn]mickwah81@y...[/url
Sent: Tuesday, October 21, 2003 3:07 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] PWMPAL pulse accumulator
Hi All!
I've got a simple circuit - A BS2, and a PWMPAL. I'm feeding a logic
level signal into the PWMPAL, pulsing around once a second, and on for
40% and off for 60% (for all the brains out there...)
I simply want to read into my BS2 as to how many pulses have been
counted since I reset the counter!
At the moment, it's kind of working, in that it's counting the pulses,
but sometimes increments by 2, and even by 3, for only 1 pulse...
If anyone has done anything like this, code you please help out!
Thanks a million for atleast reading my post [noparse];)[/noparse]
Mick
Deakin Uni
Down Under
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