Hello every one. I'm a beginner. I'm using TMS320DM642 board with CCS 3. I
want to use AIC23 Codec for some DSP algorithms.
My problem is when I read each block of 100 PCM sapmles then wrote them to codec
data port, I didn't hear anything from my headphone.
If I read one sample and wrote it to codec data port immediately, it worked.
If I read every 2 samples and wrote them to codec data port, it worked but there
was so much noise.

Please give me some advice. Thank you very much.
these are my excerpts of code:
----------------------------------------------------------------
int main()
{
    EVMDM642_AIC23_CodecHandle hCodec1;
    int i;
    Uint32 InpBuffer[100];
    Uint32 OutBuffer[100];

    EVMDM642_init();
    hCodec1 = EVMDM642_AIC23_openCodec(0, &config, EVMDM642_AIC23_INPUT |
EVMDM642_AIC23_OUTPUT );
    EVMDM642_AIC23_setFreq(hCodec1, 8000);

    while (1)
    {    
        for (i = 0; i < 100; i++)
            EVMDM642_AIC23_read32(hCodec1, &InpBuffer[i]);
        for (i = 0; i < 100; i++)
            OutBuffer[i] = InpBuffer[i];
        for (i = 0; i < 100; i++)
           while(!EVMDM642_AIC23_write32(hCodec1, OutBuffer[2]));
    }
}
------------------------------------------------------------------
------------------------------------------------------------------
int main()
{
    EVMDM642_AIC23_CodecHandle hCodec1;
    int i;
    Uint32 Sample;

    EVMDM642_init();
    hCodec1 = EVMDM642_AIC23_openCodec(0, &config, EVMDM642_AIC23_INPUT |
EVMDM642_AIC23_OUTPUT );
    EVMDM642_AIC23_setFreq(hCodec1, 8000 );

    while (1)
    {    
        EVMDM642_AIC23_read32(hCodec1, &Sample);
        while(!EVMDM642_AIC23_write32(hCodec1, Sample));
    }
}
------------------------------------------------------------------
------------------------------------------------------------------
int main()
{
    EVMDM642_AIC23_CodecHandle hCodec1;
    int i;
    Uint32 InpBuffer[2];
    Uint32 OutBuffer[2];

    EVMDM642_init();
    hCodec1 = EVMDM642_AIC23_openCodec(0, &config, EVMDM642_AIC23_INPUT |
EVMDM642_AIC23_OUTPUT );
    EVMDM642_AIC23_setFreq(hCodec1, 8000 );

    while (1)
    {    
        EVMDM642_AIC23_read32(hCodec1, &InpBuffer[0]);
        EVMDM642_AIC23_read32(hCodec1, &InpBuffer[1]);
        while(!EVMDM642_AIC23_write32(hCodec1, InpBuffer[0]));
        while(!EVMDM642_AIC23_write32(hCodec1, InpBuffer[1]));
    }
}
------------------------------------------------------------------
------------------------------------------------------------------

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