bf533_ez-kit_isr_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_ISR_Config.asm

Date Modified:	10/25/04		TL		Rev 2

Software:       VisualDSP++3.1

Hardware:		ADSP-BF533 EZ-KIT Board

Special Connections:  None

Purpose:		Interrupt priority and masking 
				
				
Program Parameters:

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


#include <defBF533.h>

.global		_BF533_EZ_KIT_ISR_Config;
.extern PPI_DMA_ISR_ASM;



.section L1_code;
/*******************************************************************************/
_BF533_EZ_KIT_ISR_Config:

	//Link the DMA interrupt subroutine to the DSP interrupt event 8
	p0.h = hi(EVT8);
	p0.l = lo(EVT8);
    r0.l = PPI_DMA_ISR_ASM;
	r0.h = PPI_DMA_ISR_ASM; 	// IVG8 Handler
  	[p0] = r0;


	
	p0.h = hi(SIC_RVECT);
	p0.l = lo(SIC_RVECT);
	r1 = [p0+SIC_ISR-SIC_RVECT];
	
	//enables the stop mode DMA interrupt by setting the System Interrupt Controller 
	r0 = 0x0100(z);
	r0 = r0 | r1;
	[p0+SIC_ISR-SIC_RVECT] = r0;
	//enables the stop mode DMA interrupt by setting the System Interrupt IMASK Register
	
	r1 = [p0+SIC_IMASK-SIC_RVECT];
	r0 = 0x0100(z);
	r0 =r1|r0;
	[p0+SIC_IMASK-SIC_RVECT] = r0;
	

	//The stop mode DMA is linked to interrupt vector 8 IVG8
	r0.l =  lo(P8_IVG(8) | P9_IVG(14) | P10_IVG(14) | P11_IVG(14));
	r1 = [p0+SIC_IAR1-SIC_RVECT];
	r0= r0|r1;
	[p0+SIC_IAR1-SIC_RVECT] = r0;

	
	//Finally the DMA interrupt has been enabled at the core level
	p0.h = hi(IMASK);
	p0.l = lo(IMASK);
	r0 = [p0];	
	r1= 0x0100;
	r0 = r0 | r1; 
	[p0] = r0;
	
_BF533_EZ_KIT_ISR_Config.END:
RTS;
/*******************************************************************************/