c3_3_2.asm

dsp入门与实践一书的源代码

.mmregs
spsa0  	.set  	38h  					
spcd0  	.set  	39h   					
drr21  	.set  	40h   					
drr11  	.set  	41h   					
dxr21  	.set  	42h   					
dxr11   	.set  	43h   					
dxr10  	.set  	23h   				
drr10  	.set  	21h   					

spcr10  	  .set 	00h					
spcr20	  .set 	01h
rcr10 	  .set 	02h
rcr20 	  .set  	03h
xcr10  	  .set 	04h
xcr20 	  .set 	05h
srgr10	  .set	06h
srgr20 	  .set 	07h
mcr10 	  .set	08h
mcr20 	  .set 	09h
rcera0  	  .set 	0ah
rcerb0 	  .set 	0bh
xcera0 	  .set 	0ch
xcerb0  	  .set 	0dh
pcr0    	  .set 	0eh
   
dss_init:
   RSBX    	cpl						
   NOP
   NOP
   STM     	spcr10,spsa0
   NOP
   STM     	06h,spcd0           			
   NOP
   STM     	spcr20,spsa0
   NOP
   STM     	200h,spcd0          			
   NOP
   STM     	pcr0,spsa0
   NOP
   STM     	0eh,spcd0 
   NOP
   STM     	rcr10,spsa0
   NOP
   STM     	40h,spcd0
   NOP
   STM     	rcr20,spsa0
   NOP
   STM     	4h,spcd0
   NOP
   STM     	xcr10,spsa0
   NOP
   STM     	40h,spcd0
   NOP
   STM     	xcr20,spsa0
   NOP
   STM     	4h,spcd0
   NOP
   
   LD      	#64h,a             				
   RPT     	#50
   NOP
   
   STM     	spcr10,spsa0
   NOP
   STM     	07h,spcd0           			
   NOP
   STM     	spcr20,spsa0
   NOP
   STM     	201h,spcd0
   NOP
   RPT     	#50
   NOP