Re: Re: query regarding interfacing of ADC/DAC for speech i/p and o/p

Hi Jeff,
Thanks for ur reply. The code snippet that u have mentioned (i.e. loopback) is already working and i hav already tried it out. But I just want to store the audio input in some buffer array or any thing else. And then I want to loop it back after sometime (in seconds just like after introducing some delay). Please look in to my code to understand wht i am trying to do. This is my first assignment to configure DSK and a preliminary demo (abt which my question is). After that i will start learning DSP concepts and tutorials and manuals of CCS. So kindly help me to get this first step.

Regards,

Umer

Umer-
>
>> So did u find answer to your query? I am really a new comer in
>> DSP domain and unknown to working C5510 in detail. I want to read
>> audio input from mic and store it.Then i want to play it back to
>> headphone.
>>
>> This is my main():
>
>First I would try something very simple to verify your DSK board, tool
>set-up, build options, memory map, and other basic factors are Ok:
>
>void main() {
>
>DSK5510_AIC23_CodecHandle hCodec;
>Int16 left,right;
>
> /* Initialize the board support library, must be called first */
> DSK5510_init();
>
> /* Start the codec */
> hCodec = DSK5510_AIC23_openCodec(0, &config);
>
> /* Audio loopback */
> while (TRUE) {
>
> while (!DSK5510_AIC23_read16(hCodec, &left));
> while (!DSK5510_AIC23_read16(hCodec, &right));
>
> while(!DSK5510_AIC23_write16(hCodec, left));
> while(!DSK5510_AIC23_write16(hCodec, right));
> }
>
> DSK5510_AIC23_closeCodec(hCodec);
>}
>
>This should enable audio loopback -- you should hear whatever is on the
>inputs. Does that much work? If so, then you can go step-by-step to add
>the functionality you need, testing each step carefully.
>
>Also, here is a nice page for generating a sine wave with DSK 5510:
>
> http://www.tkt.cs.tut.fi/kurssit/3516/exercises/fall05/test_audioIO.c
>
>-Jeff
>> void main()
>> {
>>
>> DSK5510_AIC23_CodecHandle hCodec;
>> Int16 i,j,k,left,right;
>> Int16 input1[8000];
>> Int16 input2[8000];
>> /* Initialize the board support library, must be called first */
>> DSK5510_init();
>>
>> /* Start the codec */
>> hCodec = DSK5510_AIC23_openCodec(0, &config);
>>
>> /* Generate a 1KHz sine wave for 5 seconds */
>> for (i = 0; i < 10; i++)
>> {
>> for (j = 0; j < 8000; j++)
>> {
>> /* Read a sample from left channel */
>> while (!DSK5510_AIC23_read16(hCodec, &left));
>> input1[j]=left;
>>
>> /* Read a sample from right channel */
>> while (!DSK5510_AIC23_read16(hCodec, &right));
>> input2[j]= right;
>> }
>>
>> }
>> for (i = 0; i < 10; i++)
>> {
>> for(k=0; k {
>> while(!DSK5510_AIC23_write16(hCodec, input1[k]));
>> /* Send a sample to the right channel */
>> while(!DSK5510_AIC23_write16(hCodec, input2[k]));
>> }
>> }
>> /* Close the codec */
>> DSK5510_AIC23_closeCodec(hCodec);
>> }
>>
>> But it is not giving any output. What to do?
>> kindly help me where i am going wrong. I will be waiting for ur reply
>>
>> regards,
>> Umer
>> >
>> > hello everybody
>> > i m an student doing project "Real time
>> > implementation of G.723.1 on TMS320VC5510"
>> > right now i am ready with optimised code which is
>> > running in CCS simulator by taking i/p from file and
>> > putting o/p in2 file
>> > but now my next step is to run it in to DSK board for
>> > that i have to take i/p from mike and taken o/p from
>> > headphone
>> > and for that i have to interface adc/dac of that
>> > particular board which uses AIC23 as a codec.
>> > i tried 2 get some idea from audio project available
>> > in TI but not getting the flow as i don't aquant with
>> > DSP-BIOS also
>> > please any1 sugest me how to proceed or else can
>> > anybody send me programme to interface codec withought
>> > using DSP-BIOS
>> >
>> > sorry for long mail
>> > waiting for early reply as i have to submit my project
>> > bbye
>> > Alpana
>> > M.E.(GCOEP)
>> > Pune
>> >
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