The document describes a program listing for an adaptive FIR LMS noise cancellation filter implemented on a TMS320C613 DSP. The FIR filter structure and LMS algorithm for updating filter coefficients are explained. Noise inputs include 100Hz sinusoidal noise and burst noise. The program provides selectable output types including original signal, noise signal, filtered noise signal, and error signal.
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(381877808) 102054282 5-listing-program
1. LISTING PROGRAM FILTER PENGHAPUS NOISE ADAPTIF FIR LMS
DENGAN MEMANFAATKAN TMS320C613
//Filter PEnghapus Noise Adaptif FIR LMS
//Struktur Filter FIR : x1_topi += w[n]*x[n]
//Sinyal_error=output_sistem : sinyal_e(n) = sinyal_campur - x1_topi;
//UPdate Koefisien Menggunakan Algoritma LMS : w[i]+=miu*sinyal_e(n)*x[n];
//miu bervariasi berdasarkan pendekatan rumus step size maks : 1/NPx
//noise yang dipakai noise sinusoida 100 Hz dan noise Bor
//
//codec-DSK(TMS320C6713)
#include "DSK6713_AIC23.h"
//
//sampling
Uint32 fs=DSK6713_AIC23_FREQ_48KHZ;
#include <stdio.h>
//
//panjang elemen filter
#define N 30
//
//definisi kanal kiri line input
#define LEFT 0
//
//definisi kanal kanan line output
#define RIGHT 1
//
//nilai bobot koefisien filter untuk panjang element N
float w[N];//
//input ke buffer untuk panjang elemen N pada filter FIR
float delay[N];
//
//output TMS320C6713
short output;
//tipe output pilihan jenis keluaran
short jenis_keluaran = 1;
//
//
2. //deskripsi masukan 2kanal line input
volatile union{unsigned int uint; short channel[2];}AIC23_data;
//
//ISR
interrupt void c_int11()
{
short i;
float yn=0, En=0,campur=0, noise=0;
//masukan 32bit dari line input
AIC23_data.uint = input_sample();
//definisi noise untuk masukan line kiri
noise =(AIC23_data.channel[LEFT]);
//definisi noise untuk masukan line kanan
campur = (AIC23_data.channel[RIGHT]);
//noise sebagai masukan buffer ke-0 untuk FIR
delay[0] = noise;
//FIR
for (i = 0; i < N; i++)
//keluaran filter FIR
yn += (w[i] * delay[i]);
//sinyal selisih suara campuran dengan noise keluaran filter FIR
En = campur - yn;
//update koefisien filter dan delay FIR
for (i = N-1; i >= 0; i--)
{
//update koefisien(LMS algoritma)
w[i] = w[i] + 0.0000000003*En*delay[i];
//update sample delay
delay[i] = delay[i-1];
}
//bila pilihan menu jenis keluaran dalam posisi 1
if(jenis_keluaran == 1)
3. //jenis_keluaran = sinyal asli
output=((short)campur);
//bila pilihan menu jenis keluaran dalam posisi 2
else if(jenis_keluaran==2)
//jenis_keluaran = sinyal noise
output=((short)noise);
//bila pilihan menu keluaran dalam posisi 3
else if(jenis_keluaran==3)
//jenis keluaran = sinyal campuran
output=((short)campur);
//bila pilihan menu keluaran dalam posisi 4
else if(jenis_keluaran==4)
//jenis keluaran=sinyal filter noise FIR
output=((short)yn);
//bila pilihan menu keluaran dalam posisi 5
else if(jenis_keluaran==5)
//jenis_keluaran = sinyal selisih error
output=((short)En);
//bila pilihan menu keluaran dalam posisi 6
else if(jenis_keluaran==6)
//jenis_keluaran=sinyal suara tanpa noise
output=((short)En);
output_sample(output);
return;
}
void main()
{
short T=0;
for (T = 0; T < 30; T++)
{
//inisialisasi buffer untuk bobot koefisien filter
w[T] = 0;
//inisialisasi buffer untuk sample delay
delay[T] = 0; }
comm_intr();
while(1);
}
4. LISTING PROGRAM TOMBOL PILIHAN OUTPUT (SLIDE GEL)
/*pilihan jenis keluaran TMS320C6713*/
/*pilihan sebanyak 6 buah yaitu untuk keluaran sinyal asli, sinyal noise, sinyal noise hasil
filtering, sinyal campur, sinyal e(n), sinyal output system*/
/*Nama menu adalah jenis keluaran*/
menuitem "jenis_keluaran"
/*slide macam-macam keluaran*/
/*(nilai awal, nilai akhir, nilai kenaikan, nilai default, nama variable)*/
slider jenis_keluaran(1,6,1,1,keluaran){
/*slide keluaran sama dengan nilai variabel*/
jenis_keluaran = keluaran;
}
5. LISTING PROGRAM FILE SUPPORT “dsk6713.h”
/*
* Copyright 2002 by Spectrum Digital Incorporated.
* All rights reserved. Property of Spectrum Digital Incorporated.
*/
/*
* ======== dsk6713.h ========
*
* This files contains DSK6713 board specific I/O registers
* define for the CPLD.
*/
#ifndef DSK6713_
#define DSK6713_
#ifdef __cplusplus
extern "C" {
#endif
#include <csl.h>
/*
* Note: Bit definitions for each register field
* needs to be supplied here for the CPLD
* and other board periperals.
*/
/* Compatability definitions */
#define NULL 0
/* CPLD address definitions */
#define DSK6713_CPLD_BASE 0x90080000
/* CPLD Register Indices */
#define DSK6713_USER_REG 0
#define DSK6713_DC_REG 1
#define DSK6713_VERSION 4
6. #define DSK6713_MISC 6
/* CPLD Register Bits */
#define DC_DET 0x80
#define DC_STAT1 0x20
#define DC_STAT0 0x10
#define DC_CNTL1 0x02
#define DC_CNTL0 0x01
#define TIN1SEL 0x08
#define TIN0SEL 0x04
#define MCBSP2SEL 0x02
#define MCBSP1SEL 0x01
/* Initialize all board APIs */
void DSK6713_init ();
/* Read an 8-bit value from a CPLD register */
Uint8 DSK6713_rget(Int16 regnum);
/* Write an 8-bit value to a CPLD register */
void DSK6713_rset(Int16 regnum, Uint8 regval);
/* Spin in a delay loop for delay iterations */
void DSK6713_wait(Uint32 delay);
/* Spin in a delay loop for delay microseconds */
void DSK6713_waitusec(Uint32 delay);
/* Get the DSK version */
Int16 DSK6713_getVers ion();
#ifdef __cplusplus
}
#endif
#endif
7. LISTING PROGRAM FILE SUPPORT “dsk6713_aic23.h”
/*
* Copyright 2002 by Spectrum Digital Incorporated.
* All rights reserved. Property of Spectrum Digital Incorporated.
*/
/*
* ======== dsk6713.h ========
*
* This files contains DSK6713 board specific I/O registers
* define for the CPLD.
*/
#ifndef DSK6713_
#define DSK6713_
#ifdef __cplusplus
extern "C" {
#endif
#include <csl.h>
/*
* Note: Bit definitions for each register field
* needs to be supplied here for the CPLD
* and other board periperals.
*/
/* Compatability definitions */
#define NULL 0
/* CPLD address definitions */
#define DSK6713_CPLD_BASE 0x90080000
/* CPLD Register Indices */
#define DSK6713_USER_REG 0
#define DSK6713_DC_REG 1
8. #define DSK6713_VERSION 4
#define DSK6713_MISC 6
/* CPLD Register Bits */
#define DC_DET 0x80
#define DC_STAT1 0x20
#define DC_STAT0 0x10
#define DC_CNTL1 0x02
#define DC_CNTL0 0x01
#define TIN1SEL 0x08
#define TIN0SEL 0x04
#define MCBSP2SEL 0x02
#define MCBSP1SEL 0x01
/* Initialize all board APIs */
void DSK6713_init ();
/* Read an 8-bit value from a CPLD register */
Uint8 DSK6713_rget(Int16 regnum);
/* Write an 8-bit value to a CPLD register */
void DSK6713_rset(Int16 regnum, Uint8 regval);
/* Spin in a delay loop for delay iterations */
void DSK6713_wait(Uint32 delay);
/* Spin in a delay loop for delay microseconds */
void DSK6713_waitusec(Uint32 delay);
/* Get the DSK version */
Int16 DSK6713_getVers ion();
#ifdef __cplusplus
}
#endif
#endif
9. LISTING PROGRAM FILE SUPPORT “c6713init.c”
//C6713dskinit.c Includes functions from TI in the C6713 CSL and C6713DSK BSL
#include "C6713dskinit .h"
#define using_bios //if BIOS don't use top of vector table
extern Uint32 fs; //for sampling frequency
void c6713_dsk_init() //dsp-peripheral initializat ion
{
DSK6713_init(); //call BSL to init DSK-EMIF,PLL)
hAIC23_handle=DSK6713_AIC23_openCodec(0, &config);//handle(pointer) to codec
DSK6713_AIC23_setFreq(hAIC23_handle, fs); //set sample rate
MCBSP_config(DSK6713_AIC23_DATAHANDLE,&AIC23CfgData);// interface 32 bits
toAIC23
MCBSP_start(DSK6713_AIC23_DATAHANDLE, MCBSP_XMIT_START |
MCBSP_RCV_START |
MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC, 220);//start data channel
again
}
void comm_poll() //added for
communication/init using polling
{
poll=1; //1 if using polling
c6713_dsk_init(); //init DSP and codec
}
void comm_intr() //for
communication/init using interrupt
{
poll=0; //0 since not polling
IRQ_globalDisable(); //disable interrupts
c6713_dsk_init(); //init DSP and codec
10. CODECEventId=MCBSP_getXmtEventId(DSK6713_AIC23_codecdatahandle);//McB
SP1 Xmit
#ifndef using_bios //do not need to point to vector
table
IRQ_setVecs(vectors); //point to the IRQ vector table
#endif //since
interrupt vector handles this
IRQ_map(CODECEventId, 11); //map McBSP1 Xmit to INT11
IRQ_reset(CODECEventId); //reset codec INT 11
IRQ_globalEnable(); //globally enable interrupts
IRQ_nmiEnable(); //enable NMI interrupt
IRQ_enable(CODECEventId); //enable CODEC eventXmit INT11
output_sample(0); //start McBSP interrupt outputting a sample
}
void output_sample(int out_data) //for out to Left and Right channels
{
short CHANNEL_data;
AIC_data.uint=0; //clear data structure
AIC_data.uint=out_data; //32-bit data -->data structure
//The existing interface defaults to right channel. To default instead to the
//left channel and use output_sample(short), left and right channels are swapped
//In main source program use LEFT 0 and RIGHT 1 (opposite of what is used here)
CHANNEL_data=AIC_data.channel[RIGHT]; //swap left and right
channels
AIC_data.channel[RIGHT]=AIC_data.channel[LEFT];
AIC_data.channel[LEFT]=CHANNEL_data;
if (poll) while(!MCBSP_xrdy(DSK6713_AIC23_DATAHANDLE));//if ready to transmit
MCBSP_write(DSK6713_AIC23_DATAHANDLE,AIC_data.uint);//write/output data
}
11. void output_left_sample(short out_data) //for output from left channel
{
AIC_data.uint=0; //clear data structure
AIC_data.channel[LEFT]=out_data; //data from Left channel -->data structure
transmit
channel
}
if (poll) while(!MCBSP_xrdy(DSK6713_AIC23_DATAHANDLE));// if ready to
MCBSP_write(DSK6713_AIC23_DATAHANDLE,AIC_data.uint);//output left
void output_right_sample(short out_data) //for output from right channel
{
AIC_data.uint=0; //clear data structure
AIC_data.channel[RIGHT]=out_data; //data from Right channel -->data structure
transmit
if (poll) while(!MCBSP_xrdy(DSK6713_AIC23_DATAHANDLE));// if ready to
MCBSP_write(DSK6713_AIC23_DATAHANDLE,AIC_data.uint);//output
right channel
}
Uint32 input_sample() //for 32-bit input
{
short CHANNEL_data;
receive
if (poll) while(!MCBSP_rrdy(DSK6713_AIC23_DATAHANDLE));//if ready to
AIC_data.uint=MCBSP_read(DSK6713_AIC23_DATAHANDLE);//read data
//Swapping left and right channels (see comments in output_sample())
CHANNEL_data=AIC_data.channel[RIGHT]; //swap left and right
channel
AIC_data.channel[RIGHT]=AIC_data.channel[LEFT];
AIC_data.channel[LEFT]=CHANNEL_data;
return(AIC_data.uint);
12. }
short input_left_sample() //input to left channel
{
receive
channel
if (poll) while(!MCBSP_rrdy(DSK6713_AIC23_DATAHANDLE));//if ready to
AIC_data.uint=MCBSP_read(DSK6713_AIC23_DATAHANDLE);//read into left
return(AIC_data.channel[LEFT]); //return left
channel data
}
short input_right_sample() //input to right channel
{
receive
channel
data
}
if (poll) while(!MCBSP_rrdy(DSK6713_AIC23_DATAHANDLE));//if ready to
AIC_data.uint=MCBSP_read(DSK6713_AIC23_DATAHANDLE);//read into right
return(AIC_data.channel[RIGHT]); //return right channel
15. LISTING PROGRAM PLOT SINYAL DAN FREKUENSI MATLAB
x=wavread(‘file1.wav');
y=wavread('file2.wav');
fs=10000;
% plot sinyal 1
t=(0:length(x)-1)/fs; % sampling
%gambar 1 merupakan gambar plotting sinyal 1
figure(1)
%sub gambar untuk sinyal kontinyu 1
subplot(2,1,1)
plot(t,x)
title(Sinyal 1 (Domain Waktu)')
xlabel('Waktu (s)')
ylabel('Amplitudo')
axis([min(t) max(t) min(2*x) max(2*x)])
saveas(gcf, 'sinyal1', 'jpg')
% fourier transform
X1=fft(x);
% plot spektrum dibawah 200Hz
Hz200=200*length(X1)/fs;
f=(0:hz200)*fs/length(X1);
%sub gambar sinyal fungsi frekuensi
subplot(2,1,2)
a=20*log10(abs(X1(1:length(f)))+eps);
plot(f,abs(a))
grid on
title(sinyal 1 (Domain Frekuensi)')
xlabel('Frekuensi (Hz)')
ylabel('Magnitude (dB)')
%Plot sinyal 2
t2=(0:length(y)-1)/fs; % sampling
%gambar 2 untuk plotting sinyal 2
figure(2)
17. subplot(3,1,3)
plot(f,abs(a),'b',f2,abs(a2),'r')
grid on
title('Sinyal1&sinyal2(Domain Frekuensi)')
legend('sinyal1','sinyal2',0);
xlabel('Frekuensi (Hz)')
ylabel('Magnitude (dB)')
saveas(gcf, '3gbr', 'jpg')
%gambar 4 untuk plotting gabungan sinyal1 dan 2 domain frekuensi
figure(4)
plot(f,abs(a),'b',f2,abs(a2),'r','linewidth',1.5)
grid on
title(sinyal 1 dan sinyal 2 (Domain Frekuensi)')
legend('Output Sistem','Campuran',1);
xlabel('Frekuensi (Hz)')
ylabel('Magnitude (dB)')
saveas(gcf, 'frekDomain', 'jpg')
18. LISTING PROGRAM HITUNG SNR SINYAL DENGAN MATLAB
clc,
%baca sinyal suara.wav
x_signal = wavread(‘sinyal suara’.wav');
%baca sinyal noise.wav
x_noise = wavread('sinyal noise.wav');
%Daya Sinyal suara
P_x_signal = mean(x_signal.^2);
%daya sinyal noise
P_x_noise = mean(x_noise.^2);
%SNR
SNR1 = 10*log10(P_x_signal/P_x_noise);
![LISTING PROGRAM FILTER PENGHAPUS NOISE ADAPTIF FIR LMS
DENGAN MEMANFAATKAN TMS320C613
//Filter PEnghapus Noise Adaptif FIR LMS
//Struktur Filter FIR : x1_topi += w[n]*x[n]
//Sinyal_error=output_sistem : sinyal_e(n) = sinyal_campur - x1_topi;
//UPdate Koefisien Menggunakan Algoritma LMS : w[i]+=miu*sinyal_e(n)*x[n];
//miu bervariasi berdasarkan pendekatan rumus step size maks : 1/NPx
//noise yang dipakai noise sinusoida 100 Hz dan noise Bor
//
//codec-DSK(TMS320C6713)
#include "DSK6713_AIC23.h"
//
//sampling
Uint32 fs=DSK6713_AIC23_FREQ_48KHZ;
#include <stdio.h>
//
//panjang elemen filter
#define N 30
//
//definisi kanal kiri line input
#define LEFT 0
//
//definisi kanal kanan line output
#define RIGHT 1
//
//nilai bobot koefisien filter untuk panjang element N
float w[N];//
//input ke buffer untuk panjang elemen N pada filter FIR
float delay[N];
//
//output TMS320C6713
short output;
//tipe output pilihan jenis keluaran
short jenis_keluaran = 1;
//
//](https://image.slidesharecdn.com/381877808102054282-5-listing-program-141109123656-conversion-gate02/85/381877808-102054282-5-listing-program-1-320.jpg)
![//deskripsi masukan 2kanal line input
volatile union{unsigned int uint; short channel[2];}AIC23_data;
//
//ISR
interrupt void c_int11()
{
short i;
float yn=0, En=0,campur=0, noise=0;
//masukan 32bit dari line input
AIC23_data.uint = input_sample();
//definisi noise untuk masukan line kiri
noise =(AIC23_data.channel[LEFT]);
//definisi noise untuk masukan line kanan
campur = (AIC23_data.channel[RIGHT]);
//noise sebagai masukan buffer ke-0 untuk FIR
delay[0] = noise;
//FIR
for (i = 0; i < N; i++)
//keluaran filter FIR
yn += (w[i] * delay[i]);
//sinyal selisih suara campuran dengan noise keluaran filter FIR
En = campur - yn;
//update koefisien filter dan delay FIR
for (i = N-1; i >= 0; i--)
{
//update koefisien(LMS algoritma)
w[i] = w[i] + 0.0000000003*En*delay[i];
//update sample delay
delay[i] = delay[i-1];
}
//bila pilihan menu jenis keluaran dalam posisi 1
if(jenis_keluaran == 1)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)