In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Jon Williams wrote:

If you're looking for a simple way to do this project, then I'd suggest you stick with an external decorder and let the SX28 handle the logic of the values coming in.  If I were doing this, that's how I'd proceed (but then, I'm a big SX/B fan and not so good with assembly that will likely be required if you want to use the SX28 to decode the DTMF signal).

The strategy I'd use is to create a "background" process that monitors the output of the MT8870 for a new character and then moves it into a circular buffer.  The foreground program, then, would simply focus on pulling characters from the buffer and processing them accordingly.

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


You can view the post on-line at:
http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=79099#m79102

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

The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2005 (http://www.dotNetBB.com)