bf533_ez-kit_sdram_config.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_SDRAM_Config.asm

Date Modified:	3/27/03		TL		Rev 1.2

Software:       VisualDSP++3.1

Hardware:		ADSP-BF533 EZ-KIT Board

Special Connections:  None

Purpose:		EZ-KIT SDRAM setup 
				
				
Program Parameters:

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


#include <defBF533.h>

.global		BF533_EZ_KIT_SDRAM_Config;

.section L1_code;
/*******************************************************************************/
/* Initalize SDRAM registers. */
BF533_EZ_KIT_SDRAM_Config:

	// Check if already enabled
	P0.l = lo(EBIU_SDSTAT);
	P0.h = hi(EBIU_SDSTAT);
	R0 = w[p0](z);
	CC = bittst(R0, bitpos(SDRS));  // SDRS
	if !CC jump skip_sdram_enable;

	//SDRAM Refresh Rate Control Register
	P0.L = lo(EBIU_SDRRC);
	P0.H = hi(EBIU_SDRRC);
	R0 = 0x0817 (z);								
	w[P0] = R0;

	//SDRAM Memory Bank Control Register
	P0.L = lo(EBIU_SDBCTL);			
	P0.H = hi(EBIU_SDBCTL);					
	R0.L = 0x0013;								
	R0.H = 0x0000;								
	[P0] = R0;

	//SDRAM Memory Global Control Register	
	P0.L = lo(EBIU_SDGCTL);
	P0.H = hi(EBIU_SDGCTL);
	R0.L = 0x998d;
	R0.H = 0x0091;
	[P0] = R0;	

skip_sdram_enable: nop;
	
BF533_EZ_KIT_SDRAM_Config.END:
RTS;
/*******************************************************************************/