CCS/TMS320C5505: FIR filter dsplib

Satyajit Chincholkar

Intellectual 495 points

Part Number: TMS320C5505

Tool/software: Code Composer Studio

Dear All,

I am trying to use the built-in cfir function in dsplib to implement the fir filter. I am using below code:

Int16 left_input;

int const h[52] = {
        -22,    -25,    -30,    -38,    -50,    -66,    -86,   -112,   -143,
        -182,   -228,   -283,   -348,   -425,   -515,   -623,   -752,   -909,
        -1103, -1350, -1677, -2136, -2838, -4071, -6895, -20853, 20853,
         6895,   4071,   2838,   2136,   1677,   1350,   1103,    909,    752,
         623,    515,    425,    348,    283,    228,    182,    143,    112,
         86,     66,     50,     38,     30,     25,     22
};

void main( void )
{
    signed short int left_input2 = 0

    /* Initialize BSL */
    USBSTK5505_init( );

    /* Initialize PLL */
    pll_frequency_setup(100);

    /* Initialise hardware interface and I2C for code */
    aic3204_hardware_init();

    /* Initialise the AIC3204 codec */
    aic3204_init();

    asm(" bclr XF");

    for ( i = 0 ; i < SAMPLES_PER_SECOND * 6000 ;i++ )
    {
        aic3204_codec_read(&left_input, &right_input); // Configured for one interrupt per two channels.

        cfir(&left_input, h, &left_input2, 0, 1, 52);