config_dma.asm

来自「LCD output example code for BF5」· 汇编 代码 · 共 71 行

/*****************************************************************************
**																			**
**	 Project Name: 	LCD Colorbar									**	
**																			**
******************************************************************************

Analog Devices, Inc.  All rights reserved.

File Name:	config_dma.asm

Hardware:       ADSP-BF537

Special Connections:  None

Purpose:	Configure DMA channel parameters.
	
				
******************************************************************************/



#include "defBF537.h"

.global _config_dma;
.extern tx_buffer;

.section program;

_config_dma:

	
	P1.L = lo(DMA0_CONFIG);
	P1.H = hi(DMA0_CONFIG);
	//R1.L = 0x1094;
	R1.L = 0x1094;
	W[P1] = R1.L;	//DMA0_CONFIG	
	SSYNC;
	
	P0.L = lo(DMA0_START_ADDR);
	P0.H = hi(DMA0_START_ADDR);	
	R0.L = 0xc400;		
	R0.H = 0x0;
	[P0] = R0;		//DMA0_START_ADDR
	SSYNC;

	P2.L = lo(DMA0_X_COUNT);
	P2.H = hi(DMA0_X_COUNT);
	R2.L = 640;
	W[P2] = R2.L;	//DMA0_X_COUNT					
	SSYNC;
	
	P3.L = lo(DMA0_X_MODIFY);
	P3.H = hi(DMA0_X_MODIFY);
	R3.L = 0x0002;
	W[P3] = R3.L;	//DMA0_X_MODIFY
	SSYNC;
							
	P4.L = lo(DMA0_Y_COUNT);
	P4.H = hi(DMA0_Y_COUNT);
	R4.L = 525;
	W[P4] = R4.L;	//DMA0_Y_COUNT	
	SSYNC;
					
	P5.L = lo(DMA0_Y_MODIFY);
	P5.H = hi(DMA0_Y_MODIFY);
	R3.L = 0x0002;
	W[P5] = R3.L;	//DMA0_Y_MODIFY
	SSYNC;

_config_dma.END:	RTS;