bf533_ez-kit_adv_reset.asm

bf533平台图像采集程序

/******************************************************************************/
//
// Name: 	BF533 EZ-KIT video ITU-656 receive mode 
//
/*****************************************************************************************************************

(C) Copyright 2003 - Analog Devices, Inc.  All rights reserved.

File Name:		BF533_EZ-KIT_ADV_reset.asm

Date Modified:	3/27/03		TL		Rev 1.2

Software:       VisualDSP++3.1

Hardware:		ADSP-BF533 EZ-KIT Board

Special Connections:  None

Purpose:		To reset the ADV7183 video device
				
				
Program Parameters:

************************************************************************************************/


#include <defBF533.h>

.global BF533_EZ_KIT_ADV_reset;

/**************************************************************************/
//That procedure resets the ADV7183 decoder via the flash flag

    
#define flashA_csio 0x20270000	// EZ-KIT flash base addr
#define portA_data_out 0x04	    // EZ-KIT flash offset
#define RST_7183 0x3           //decoder reset bit #3 in flashA portA
#define PPICLK_ADV7183_SELECT 0x4  //decoder clock to PPI bit #4 in flashA portA
#define ADV7183_OE_bit 2   // ADV7183 /OE = PF2
#define ADV7183_OE 0x4	   // ADV7183 /OE = PF2
/**************************************************************************/


.section L1_code;
BF533_EZ_KIT_ADV_reset:    

	// de-assert reset from ADP7183 device (flashA portA bit 3) 

	p1.h = hi(flashA_csio);
	p1.l = lo(flashA_csio) + portA_data_out;
	r0 = b[p1] (z);
	bitset(r0,RST_7183);     // de-assert reset of the decoder device
	bitset(r0,PPICLK_ADV7183_SELECT);   // connect the ADV7183 LLC1 to the PPI_CLK
	b[p1] = r0;

//  Set FIO_INEN bit for Output flags	
//  Workaround for anomaly ID# 05000079 for rev < 0.2 only
	p0.l = lo(DSPID);
	p0.h = hi(DSPID);
    r0 = [p0];
    r0 = r0.l(z);		// need only low 16-bit word
	CC = r0 < 0x2 ( IU ) ;	// rev < 0.2
	IF ! CC JUMP SKIP_FIO_INEN;
	
// enable PF inputs 
	p0.l = lo(FIO_INEN);
	p0.h = hi(FIO_INEN);
    r0 = w[p0](z);
   	bitset(r0, ADV7183_OE_bit);
    w[p0] = r0;

    
SKIP_FIO_INEN:
	p0.l = lo(FIO_DIR);
	p0.h = hi(FIO_DIR);
	r0 = w[p0](z);
	bitset(r0, ADV7183_OE_bit);
	w[p0] = r0;

	//The Flag PF2 (ADV7183_OE) will be cleared to enable the all ADV outputs
	p0.l = lo(FIO_FLAG_C);			
	p0.h = hi(FIO_FLAG_C);			
	r0.l = ADV7183_OE;
	w[p0] = r0;

	
	
BF533_EZ_KIT_ADV_reset.END:	
RTS;
/****************************************************************************/