#ifndef  __Talkthrough_DEFINED
	#define __Talkthrough_DEFINED

//--------------------------------------------------------------------------//
// Header files																//
//--------------------------------------------------------------------------//
#include <sys\exception.h>
#include <cdefBF533.h>
#include <ccblkfn.h>
#include <sysreg.h>

#include <fract.h>
#include <filter.h>
#include "btc.h"

//-------------------
//IIR parameters
//-------------------
#define NUM_TAPS 7	// number of filter coefficients

#define VEC_SIZE (NUM_TAPS*80)	// length of the input vector

//--------------------------------------------------------------------------//
// Symbolic constants														//
//--------------------------------------------------------------------------//
// addresses for Port B in Flash A
#define pFlashA_PortA_Dir	(volatile unsigned char *)0x20270006
#define pFlashA_PortA_Data	(volatile unsigned char *)0x20270004

// names for codec registers, used for iCodec1836TxRegs[]
#define DAC_CONTROL_1		0x0000
#define DAC_CONTROL_2		0x1000
#define DAC_VOLUME_0		0x2000
#define DAC_VOLUME_1		0x3000
#define DAC_VOLUME_2		0x4000
#define DAC_VOLUME_3		0x5000
#define DAC_VOLUME_4		0x6000
#define DAC_VOLUME_5		0x7000
#define ADC_0_PEAK_LEVEL	0x8000
#define ADC_1_PEAK_LEVEL	0x9000
#define ADC_2_PEAK_LEVEL	0xA000
#define ADC_3_PEAK_LEVEL	0xB000
#define ADC_CONTROL_1		0xC000
#define ADC_CONTROL_2		0xD000
#define ADC_CONTROL_3		0xE000

// names for slots in ad1836 audio frame
#define INTERNAL_ADC_L0			0
#define INTERNAL_ADC_L1			1
#define INTERNAL_ADC_R0			4
#define INTERNAL_ADC_R1			5
#define INTERNAL_DAC_L0			0
#define INTERNAL_DAC_L1			1
#define INTERNAL_DAC_L2			2
#define INTERNAL_DAC_R0			4
#define INTERNAL_DAC_R1			5
#define INTERNAL_DAC_R2			6

// size of array iCodec1836TxRegs and iCodec1836RxRegs
#define CODEC_1836_REGS_LENGTH	11

// SPI transfer mode
#define TIMOD_DMA_TX 0x0003

// SPORT0 word length
#define SLEN_32	0x001f
#define SLEN_16 0x000f

// DMA flow mode
#define FLOW_1	0x1000
#define DMAFLOW 0x7000


extern fract16 coefs[2*NUM_TAPS];
extern fract16 delay[2*(NUM_TAPS+NUM_TAPS)];
//extern fract16 inputBuffer[VEC_SIZE+VEC_SIZE+NUM_TAPS+NUM_TAPS];
//extern fract16 out[(VEC_SIZE + NUM_TAPS - 1)*2];
extern iir_state_fr16 state;	// declare filter state

//--------------------------------------------------------------------------//
// Global variables															//
//--------------------------------------------------------------------------//
extern short iChannel0LeftIn;
extern short iChannel0RightIn;
extern fract16 iChannel0LeftOut;
extern fract16 iChannel0RightOut;
extern fract16 iChannel1LeftIn;
extern fract16 iChannel1RightIn;
extern short iChannel1LeftOut;
extern short iChannel1RightOut;
extern volatile short sCodec1836TxRegs[];
extern fract16 iRxBuffer0[];
extern fract16 iTxBuffer0[];
extern fract16 iRxBuffer1[];
extern fract16 iTxBuffer1[];

//--------------------------------------------------------------------------//
// DMA Operation                                                            //
//--------------------------------------------------------------------------//
typedef struct {
	unsigned long next_desc_ptr;	/* DMA Next Descriptor Pointer register */
	unsigned long start_addr;	/* DMA Start address  register */

	unsigned short cfg;	/* DMA Configuration register */
	unsigned short x_count;	/* DMA x_count register */
	unsigned short x_modify;	/* DMA x_modify register */
	unsigned short y_count;	/* DMA y_count register */
	unsigned short y_modify;	/* DMA y_modify register */
} dma_register_t;

extern dma_register_t pDmaDescR0;
extern dma_register_t pDmaDescT0;
extern dma_register_t pDmaDescR1;
extern dma_register_t pDmaDescT1;
extern int dmaFlag;

//--------------------------------------------------------------------------//
// Prototypes																//
//--------------------------------------------------------------------------//
// in file Initialisation.c
void Init_EBIU(void);
void Init_Flash(void);
void Init1836(void);
void Init_Sport0(void);
void Init_DMA(void);
void Init_Sport_Interrupts(void);
void Enable_DMA_Sport(void);

// in file Process_data.c
void Process_Data(void);
//void firStereo(const fract16 x[],fract16 y[],int n,fir_state_fr16 *s);
void iirStereo(const fract16 x[],fract16 y[],int n,iir_state_fr16 *s);

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

#endif //__Talkthrough_DEFINED