ale.h

noise cancelation useing DSP BF537

///////////////////////////////////////////////////////////////////////////////
//
// 	
//  Experiment 4.5_BF537 Adaptive line enhancer (ALE) with BF537 EZ-KIT
//  FILE name: ALE.h
//
//  Description: Perform real-time ALE to remove noisy signal.
//		 Header file to perform necessary variable declaration
//  
//  For the book "Embedded Signal Processing with the Micro Signal Architecture"
//		  By Woon-Seng Gan and Sen M. Kuo
//		  Publisher: John Wiley and Sons, Inc.
//
//  Tools used: VisualDSP++ v4.0 (running on BF537 EZ-KIT)
//
///////////////////////////////////////////////////////////////////////////////


#ifndef  __ALE_DEFINED
	#define __ALE_DEFINED

#ifndef ETSI_SOURCE
	#define ETSI_SOURCE
#endif

//--------------------------------------------------------------------------//
// Header files																//
//--------------------------------------------------------------------------//
#include <sys\exception.h>
#include <cdefBF537.h>
#include <fract.h>
#include <filter.h>
#include <sysreg.h>
#include <ccblkfn.h>
#include <stats.h>
#include <libetsi.h>

//--------------------------------------------------------------------------//
// Symbolic constants														//
//--------------------------------------------------------------------------//
// names for registers in AD1854/AD187 converters
#define INTERNAL_ADC_L0			0
#define INTERNAL_ADC_R0			1
#define INTERNAL_DAC_L0			0
#define INTERNAL_DAC_R0			1


#define delay 0xf00

// SPORT0 word length
#define SLEN_24	0x0017

// DMA flow mode
#define FLOW_1					0x1000


//--------------------------------------------------------------------------//
// Global variables															//
//--------------------------------------------------------------------------//

#define INPUT_SIZE				256
#define TOTAL_FRAME				2
#define TAPS					32
#define DELAY_SIZE				100
#define BETA					0x0080 // 1/256
#define BETA1					0x7F80 // 1-(1/256)

extern short sCh0LeftIn[];
extern short sCh0RightIn[];
extern short sCh0LeftOut[];;
extern short sCh0RightOut[];

extern int iRxBuffer1[];
extern int iTxBuffer1[];

extern fract16 coefL[];
extern fract16 coefR[];
extern fract16 lmsdelayL[];
extern fract16 lmsdelayR[];

extern unsigned char ucMode;
#define OUT1		0x4		// Passthrough mode
#define OUT2		0x8		// Prediction (adaptive filter output)
#define OUT3		0x10		// Error (input-prediction)
extern fract16 LMSOutPredL[];
extern fract16 LMSOutPredR[];
extern fract16 LMSOutErrL[];
extern fract16 LMSOutErrR[];

extern fir_state_fr16 firstateL;
extern fir_state_fr16 firstateR;
extern fract16 firdelayL[];
extern fract16 firdelayR[];

//--------------------------------------------------------------------------//
// Prototypes																//
//--------------------------------------------------------------------------//
// in file Initialize.c
void Init_Flags(void);
void Audio_Reset(void);
void Init_Sport0(void);
void Init_DMA(void);
void Init_Interrupts(void);
void Init_PF(void);
void Init_Filter(void);
void Enable_DMA_Sport0(void);

// in file Process_data.c
void Process_Data(void);

// in file ISRs.c
EX_INTERRUPT_HANDLER(Sport0_RX_ISR);
EX_INTERRUPT_HANDLER(Switch_ISR);

#endif