In SX Microcontrollers, SX/B Compiler and SX-Key Tool, George Herzog wrote:

Thanks Peter [pjv],
I took a look at your contest code and your style of notation is quite clear - very enjoyable to read.

I spent some time today reviewing what I think it would take and an ISR is definetly part of it.  
I have to capture the beginning and the end of each pulse just to get started, then I have to get the difference.  

If I cannot restart the timer for each pulse, I have to trap values when the counter rolls over and do a special routine.

Then having done that, repeat the process 4 times.  And the cycle repeats approxiably every 20 millaseconds [that creates another programing detail to work out].

I don't have a scope and I think I would need 4 inputs anyway [which is too expensive for me].  So I am just hoping that Jen's Autopilot article is right and the 4 pulses come one after another if you keep the inputs straight.

Everyone else seems to want to drag me off the topic in RF electronics [away from digital] or into switching to C programing in another piece of hardware.  Thanks for the effort, but I am interested in doing this in the SX and SASM and in software.

---------- End of Message ----------


You can view the post on-line at:
http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=109161#m109481

Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com

The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)