Using Counter

Rafael

I am using a BS2 with Board of Education and a waveform generator set to square wave. I just started programming so I really don't know what I'm doing.

This is what I have so far:

Counter VAR Byte
INPUT 8
OUTPUT 7
COUNT 7, 10000, Counter

Main:
DEBUG DEC Counter
END

I have tried implementing a loop and also just using an input without output. I have tried counting pins 8 and 7 (input and output).

I want the debug message to give me the value of the amount of peaks that it detected from the square wave generator. I have the generator set to 2 Hz so in 10 seconds it should be displaying 40 peaks. However I keep getting random numbers or 0. Ultimately I want to send the value of the "Counter" variable to an LCD screen, I could use·any info for that too.

- Thanks

T&E Engineer

I think if you look through the Stampworks manual that you can find what you need to do.

http://www.parallax.com/dl/docs/books/sw/Web-SW-v2.1.pdf

Chris Savage

As a note…INPUT makes the I/O pin an input…OUTPUT makes the pin an output. You’re making pin 8 an INPUT then pin 7 an OUTPUT then doing a COUNT on pin 7, which to do this needs to be an input. Of course, COUNT makes the pin an input but you should never make a pin an output that is connected to an output.

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Chris Savage
Parallax Tech Support

Bean

Rafael,
Do you have the generator and stamp grounds connected together ? If not, it won't work.

Bean.

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