DTMF Virtual Peripheral and SX/B

DynamoBen

I have a project idea that requires decoding of DTMF, and I noticed that there is a Virtual Peripheral to do so. I was wondering if it is possible to use a virtual peripheral with SX/B? If so how would I go about it or where can I find more info?

Peter Verkaik

Here is the one DTMF detect demo program I could find:
http://www.sxlist.com/techref/scenix/lib/io/osi1/dfs/dtmf_det_src.htm

It is in assembler. To convert it to SX/B (or embed·it in SX/B) I would
copy the interrupt·code as is (in asm-endasm block) and recreate
the interface with mainline code in SX/B.

This requires studying the code and will take some time, but it can be done.

regards peter
··

DynamoBen

Peter Verkaik said...
Here is the one DTMF detect demo program I could find:
http://www.sxlist.com/techref/scenix/lib/io/osi1/dfs/dtmf_det_src.htm

It is in assembler. To convert it to SX/B (or embed it in SX/B) I would
copy the interrupt code as is (in asm-endasm block) and recreate
the interface with mainline code in SX/B.

So I would assume this means I can't utilize a virtual peripheral in SX/B.

Peter Verkaik

Not directly, but with some work you can make it
work with SX/B. Key is to extract the driver part
and providing SUBs and FUNCs that access the driver.

I have written a VP library for SX/B, only that has no DTMF detect
driver. You can use that framework to include a DTMF driver. But it will take
time.

regards peter

Post Edited (Peter Verkaik) : 6/25/2009 10:43:33 PM GMT

DynamoBen

I'm thinking about doing this all in code because it seems that most of the DTMF decoder ICs have or are going obsolete. I'm will look the code over and see if I can figure it out.