Read DTMF using PICBASIC Pro

[charudatt]

Hello All,

I am wanting to read / decode DTMF tones directly using PIC with PICBASIC PRO.

Any help on this.

Thank you.

Regards

[Dave]

I'm afraid it's impossible. The hardware isn't there on board the processor. To decode a standard telephone key 3 x 4 pad takes 7 tone detectors or PLL's. The best way is to use an external decoder such as MC145436 or HT9170. There are many more out there. These are the ones I have used in the past. Good luck...

Dave Purola,

[charudatt]

Hello Dave,

Thank you for your reply,

Take a look at this site http://www.geocities.com/constantinescuradu/content/dtmf.htm

it has too much of maths involved and also offer to decode DTMF tones using PIC 16F877.

Just wondered if there was a way out using PICBASIC PRO.

regards

[Dave]

Interesting..... I'll have to read the article when I get a spare moment. Maybe you can incorporate the interrupt code within a PBP program? Good luck.

Dave Purola,