How to generate DTMF tone with 8051?

[darkman]

Hi,
I want to the generate dtmf tone with 8051
My need is C source codes on this project

Thanks..

 

[C-Man]

8051 dtmf

Take a look at this application note from rensas:
**broken link removed**

I used it to implement DTMF generation on a PIC but I think you can only do it easily using hardware PWM (which I used on a 16F628).

best regards

 

[mrcube_ns]

dtmf pic16f628a

Try with CM8870. This is DTMF decoder. Its very easy to use.


Mr.Cube

 

[darkman]

dtmf.pdf

I must use 8051

 

[C-Man]

generate dtmf with microcontroller

I must use 8051

That should not be a problem, you must select an 8051 with PCA (Programmable Counter Array) and you can do PWM on an 8051 and use the method I have posted above to generate DTMF.

hope this helps

 

[mrcube_ns]

how to generate dtmf microcontroller

In this case you have to generate tones by yourselves. Made timer (e.g. T0) which time is in base of every tone and with diferent multiplication of time you'll get diferent frequences.


Mr.Cube