/******************************************************************************/
//
// Name:  BF533 EZ-KIT video ITU-656 receive mode (8bit) for the Omnivision chip OV6630
//
/******************************************************************************

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

File Name:    BF533_EZ-KIT_ISR_Config.asm

Date Modified:   08/12/05  TL  Rev 1.0

Software:         VisualDSP++4.0, Assembler 2.6.7.5, Linker 3.5.2.2

Hardware:    BF533 EZ-KIT Board (rev 1.7), Blackfin EZ-Extender (rev 1.2)

Chip:     ADSP-BF533 REV 0.4

Special Connections:   None

Purpose:    Interrupt priority and masking
    
    
Program Parameters:

********************************************************************************/
#include <defBF533.h>

/*****************************************************************************************/
// Global and extern subroutines
/*****************************************************************************************/

.global  BF533_EZ_KIT_ISR_Config;
.extern PPI_DMA_ISR;

/*****************************************************************************************/
// Program
/*****************************************************************************************/
.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;
 r0.h = PPI_DMA_ISR;  // IVG8 Handler
   [p0] = r0;

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

 //The DMA is linked to interrupt vector 8 IVG8
 r0.l =  lo(P8_IVG(8) | P9_IVG(14) | P10_IVG(14) | P11_IVG(14));
 [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;
/*******************************************************************************/

//本代码Blackfin示例