PR

//////////////////////////////////////////////////////////////////////////////
// *
// * Predmetni projekat iz predmeta OAiS DSP 1
// * Godina: 2015
// *
// * Zadatak: Prijemnik DTMF signala
// * Autor:
// *
// *
//////////////////////////////////////////////////////////////////////////////

#include "stdio.h"
#include "ezdsp5535.h"
#include "ezdsp5535_i2c.h"
#include "aic3204.h"
#include "ezdsp5535_aic3204_dma.h"
#include "ezdsp5535_i2s.h"
#include "print_number.h"
#include "math.h"
#include "Dsplib.h"

/* Frekvencija odabiranja */
#define SAMPLE_RATE 8000L

#define PI 3.14159265

/* Velicina prozora za racunanje FFT-a */
#define FFT_SIZE AUDIO_IO_SIZE

/* Granica definisana od strane korisnika */
/* TODO Dodeliti vrednost */
#define TRESHOLD 0L

/* Niz za smestanje odbiraka ulaznog signala */
#pragma DATA_ALIGN(InputBufferL,4)
Int16 InputBufferL[AUDIO_IO_SIZE];
#pragma DATA_ALIGN(InputBufferR,4)
Int16 InputBufferR[AUDIO_IO_SIZE];

//-----------------------------------------------
#pragma DATA_ALIGN(InputBufferFFT,4)
Int32 InputBufferFFT[AUDIO_IO_SIZE];
//--------------------------------------------


void main( void )
{
    int i;

    /* Inicijalizaija razvojne ploce */
    EZDSP5535_init( );

    /* Inicijalizacija LCD kontrolera */
    initPrintNumber();

    printf("\n DTMF Prijemnik\n");

    /* Inicijalizacija veze sa AIC3204 kodekom (AD/DA) */
    aic3204_hardware_init();

    /* Inicijalizacija AIC3204 kodeka */
    aic3204_init();

    aic3204_dma_init();

    /* Postavljanje vrednosti frekvencije odabiranja i pojacanja na kodeku */
    set_sampling_frequency_and_gain(SAMPLE_RATE, 0);

    Int32 THRESHOLD  = 10000000;

    while(1)
    {
        aic3204_read_block(InputBufferL, InputBufferR);

        rfft(InputBufferL, AUDIO_IO_SIZE , SCALE);

        for(i = 0; i < AUDIO_IO_SIZE; i +=2){
            InputBufferFFT[i/2] = (Int32)InputBufferL[i]*(Int32)InputBufferL[i]  +  (Int32)InputBufferL[i+1]*(Int32)InputBufferL[i+1];
        }

    if((InputBufferFFT[6]+InputBufferFFT[7]) > THRESHOLD && (InputBufferFFT[22]) > THRESHOLD)printChar('1');
    else if((InputBufferFFT[6]+InputBufferFFT[7]) > THRESHOLD && ((InputBufferFFT[25]) > THRESHOLD))printChar('2');
    else if((InputBufferFFT[6]+InputBufferFFT[7]) > THRESHOLD && ((InputBufferFFT[27]) > THRESHOLD))printChar('3');
    else if((InputBufferFFT[6]+InputBufferFFT[7]) > THRESHOLD && ((InputBufferFFT[29] + InputBufferFFT[30]) > THRESHOLD))printChar('A');
    else if((InputBufferFFT[9]) > THRESHOLD && ((InputBufferFFT[22]) > THRESHOLD))printChar('4');
    else if((InputBufferFFT[9]) > THRESHOLD && ((InputBufferFFT[25]) > THRESHOLD))printChar('5');
    else if((InputBufferFFT[9]) > THRESHOLD && ((InputBufferFFT[27]) > THRESHOLD))printChar('6');
    else if((InputBufferFFT[9]) > THRESHOLD && ((InputBufferFFT[29] + InputBufferFFT[30]) > THRESHOLD))printChar('B');
    else if((InputBufferFFT[11]) > THRESHOLD && ((InputBufferFFT[22]) > THRESHOLD))printChar('7');
    else if((InputBufferFFT[11]) > THRESHOLD && ((InputBufferFFT[25]) > THRESHOLD))printChar('8');
    else if((InputBufferFFT[11]) > THRESHOLD && ((InputBufferFFT[27]) > THRESHOLD))printChar('9');
    else if((InputBufferFFT[11]) > THRESHOLD && ((InputBufferFFT[29] + InputBufferFFT[30]) > THRESHOLD))printChar('C');
    else if((InputBufferFFT[13]+InputBufferFFT[14]) && ((InputBufferFFT[22]) > THRESHOLD))printChar('*');
    else if((InputBufferFFT[13]+InputBufferFFT[14]) && ((InputBufferFFT[25]) > THRESHOLD))printChar('0');
    else if((InputBufferFFT[13]+InputBufferFFT[14]) && ((InputBufferFFT[27]) > THRESHOLD))printChar('#');
    else if((InputBufferFFT[13]+InputBufferFFT[14]) && ((InputBufferFFT[29] + InputBufferFFT[30]) > THRESHOLD))printChar('D');
    else printChar(' ');


    }

    /* Prekid veze sa AIC3204 kodekom */
    aic3204_disable();

    printf( "\n***Kraj programa***\n" );
    SW_BREAKPOINT;
}