c6_5_1.asm

DSP应用开发实用子程序 本书从工程应用的角度出发

   			.mmregs
   			.def 		main
   			.def 		daa_data       
   	
spsa0  		.set  38h  
spsd0  		.set  39h  
dxr10  		.set  23h  
drr10  		.set  21h  
	
spsa1  		.set  48h  
spsd1  		.set  49h  
dxr11  		.set  43h  
drr11  		.set  41h  

spsa2   		.set  34h  
spsd2   		.set  35h  
drr22   		.set  30h  
drr12  		.set  31h   
dxr22  		.set  32h   
dxr12  		.set  33h   

spcr1  	 	.set 	00h	
spcr2  	 	.set 	01h
rcr1   	 	.set 	02h
rcr2   		.set 	03h
xcr1   	 	.set 	04h
xcr2   	 	.set 	05h
srgr1  		.set 	06h
srgr2  		.set 	07h
mcr1  	 	.set 	08h
mcr2   		.set 	09h
rcera   		.set 	0ah
rcerb   		.set 	0bh
xcera   		.set 	0ch
xcerb 		.set 	0dh
pcr    		.set 	0eh 
   
k_iptr  		.set 010111000b<<07	
k_temp  		.set 1111111b
data_dp   	.usect "filter_vars",0 	   	
   
main:
   nop          
   stm  		#0,clkmd		
   nop
   nop
change:
   ldm  		clkmd,a
   nop
   nop
   and  		#01,a
   nop
   nop
   bc   		change,aneq
   stm  		#0011011000001111b,clkmd 	
                	
   nop
   nop
   rpt    		#200				
   nop
   nop   
   stm  		4000h,sp			
   ld   		#0h,dp				

   ldm     	pmst,a					
   and     	#k_temp,a
   or      	#k_iptr,a
   stl     	a,ar6
   mvdm    	ar6,pmst
   nop
   nop
   stm    	#2000h,ar3						
   stm    	#1ffeh,ar4						
   stm    	#1fffh,ar5						
   ld    		#80h,b						
   nop
   nop
     
   st  		 #10h,*ar4
   st  		 #7ff0h,*ar5
   		
   stm    	 #0ffffh,tcr   			
   stm    	 #07h,prd      			
   stm    	 #08e0h,tcr			

   ssbx   	 intm				
   ssbx   	 sxm				
   st     	 #2491h,swwsr			

   nop
   nop
   nop
   ssbx   	 xf				
   nop	
   nop	
   nop
   nop
   
mcbsp0_init:						
   rsbx    	cpl					
  ;