c3_7_1.asm

dsp入门与实践一书的源代码

GBLCNTA    	.equ   01840028h 			
GBLCNTB    	.equ   0184002Ch
GBLIDXA    	.equ   01840030h
GBLIDXB    	.equ   01840034h
GBLADDRA   .equ   01840038h
GBLADDRB   .equ   0184003Ch
GBLADDRC   .equ   01840068h
GBLADDRD   .equ   0184006Ch

PRICLT0    	.equ   01840000h
SECCTL0    	.equ   01840008h
SRC0       	.equ   01840010h
DST0       	.equ   01840018h
XFRCNT0    	.equ   01840020h

dma_0_init: 						
          MVKL  		PRICLT0,B0		
          MVKH  		PRICLT0,B0
          MVKL  		0040h,A1
          MVKLH 		0E01h,A1
          STW   		A1,*B0
          NOP   		3
          
          MVKL 		SECCTL0,B0		
          MVKH 		SECCTL0,B0
          LDW  		*B0,A0
          NOP   		3
          MVKL  		0A080h,A1
          MVKLH 		0008h,A1
          STW   		A1,*B0
          NOP   		3
          
          MVKL  		SRC0,B0		
          MVKH  		SRC0,B0
          MVKL  		0000h,A0
          MVKLH 		7000h,A0
          STW   		A0,*B0
          NOP   		3           	
          
          MVKL  		DST0,B0		
          MVKH  		DST0,B0
          MVKL  		1000h,A0
          MVKLH 		8000h,A0
          STW   		A0,*B0
          NOP   		3            	
          
          MVKL  		XFRCNT0 ,B0  	
          MVKH  		XFRCNT0 ,B0	
          MVKL  		02800h,A1
          MVKLH 		0000h,A1
          STW   		A1,*B0 
          NOP   		3
         
		 MVKL  		GBLCNTA ,B0	
          MVKH  		GBLCNTA ,B0
          MVKL  		02800h,A1
          MVKLH 		0000h,A1
          NOP   		3 
          STW   		A1,*B0
          NOP   		3          
          MVKL  		0FFFCh,A1
          MVKLH 		0h,A1
          AND   		A0,A1,A0
          NOP   		3