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C6711 simple audio example

Started by tamas_harczos ●March 24, 2003
Hi,

I'm a newbie at the topic. So please excuse my stupidity :) I'm
working with a C6711 DSK without audio daughterboard. As far as I
know I'm only able to digitize audio data at 8 KHz this way. The
problem is, that most example and turorial programs are written to
use the daughterboard (through MCBSP1, instead of MCBSP0).

Could anyone help me by providing a working "record&playback"
or "simple echo" example that does ONLY use the on-board AD and DA,
and is not working through PIPES and such, but only clean C code?

Thanks in advance:

Tamas Harczos



Reply by Marko Babic ●March 25, 20032003-03-25
Hi Tamas,
I send you a project from Chassaing's book....
in that, you can record an external signal and put it back using the on-board
codec only....
Hope this helps,
Marko

tamas_harczos <> wrote: Hi,

I'm a newbie at the topic. So please excuse my stupidity :) I'm
working with a C6711 DSK without audio daughterboard. As far as I
know I'm only able to digitize audio data at 8 KHz this way. The
problem is, that most example and turorial programs are written to
use the daughterboard (through MCBSP1, instead of MCBSP0).

Could anyone help me by providing a working "record&playback"
or "simple echo" example that does ONLY use the on-board AD and DA,
and is not working through PIPES and such, but only clean C code?

Thanks in advance:

Tamas Harczos
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Reply by ●March 26, 20032003-03-26
In a message dated 3/24/2003 10:56:46 AM Eastern Standard Time,
writes:

> Hi,
>
> I'm a newbie at the topic. So please excuse my stupidity :) I'm
> working with a C6711 DSK without audio daughterboard. As far as I
> know I'm only able to digitize audio data at 8 KHz this way. The
> problem is, that most example and turorial programs are written to
> use the daughterboard (through MCBSP1, instead of MCBSP0).
>
> Could anyone help me by providing a working "record&playback"
> or "simple echo" example that does ONLY use the on-board AD and DA,
> and is not working through PIPES and such, but only clean C
> code?
I know exactly what you need!
Go to TI's web site and search for "BIOS By Degrees"
When you find it, download the zipped source and pdf file.
The zip contains 3 projects(1st without BIOS, second with BIOS and third is BIOS
based using the schedular.)
They all do an audio loopback function, that is you inject audio on the Input
stereo connector and get that looped back to you on the Output stereo connector.
Note: though the connector is stereo the DSK codec is Mono.

Good luck
/Khalid