tdm.asm

基于DSP的数字电话的实现 汇编代码的在ccs平台上实现

;PCM编解码器驱动程序，可观察到电话直通。
		.mmregs
		.def  _c_int00
        .data
TEMP	.usect	"TEMP", 20H 
TMP		.set	6AH 

K_SPCR11 .set 0000000010100001b		;串口0的初始化数据
K_SPCR21 .set 0000000000100001b
K_RCR11  .set 0001111100000000b 
K_RCR21  .set 0001111100000000b
K_XCR11  .set 0001111100000000b
K_XCR21  .set 0001111100000000b
                     ;       ;
K_PCR1   .set 0000000000000001b     
                     ; 
K_MCR11  .set 0000000000000001b		;PCM编解码器的初始化数据,0-15
K_MCR21  .set 0000000000000010b     ;0-15
K_RCERA1 .set 0000000000000000b	    ;16
K_RCERB1 .set 0000000000000001b
K_XCERA1 .set 0000000000000000B
K_XCERB1 .set 0000010000000000B     ;24


SPSA1	.set 	48h
McBSP1	.set 	49h
DXR11   .set 	43h
DXR21	.set 	42h
DRR11   .set 	41h
DRR21   .set 	40h 

SPCR11  .set 	00h 
SPCR21  .set 	01h
RCR11   .set 	02h
RCR21   .set 	03h
XCR11   .set 	04h
XCR21   .set 	05h
PCR1    .set 	0Eh
SRGR11  .set 	06h
SRGR21  .set 	07h  
MCR11   .set	08h
MCR21   .set    09h
RCERA1  .set    0ah
RCERB1  .set    0bh
XCERA1  .set    0ch
XCERB1  .set    0dh
PCR1    .set 	0Eh
 

		.text
_c_int00
		b start
		nop
		nop
NMI	rete
		nop
		nop
		nop
SINT17	.space 4*16
SINT18	.space 4*16
SINT19	.space 4*16
SINT20	.space 4*16
SINT21	.space 4*16
SINT22	.space 4*16
SINT23	.space 4*16
SINT24	.space 4*16
SINT25	.space 4*16
SINT26	.space 4*16
SINT27	.space 4*16
SINT28	.space 4*16
SINT29	.space 4*16
SINT30	.space 4*16
INT0	rsbx 	intm
		rete
		nop
		nop
INT1	rsbx 	intm
		rete
		nop
		nop
INT2	rsbx 	intm
		rete
		nop
		nop
TINT:	RETE
		nop
		nop
		nop
RINT0:	rete			
		nop
		nop
		nop
XINT0:	rete
		nop
		nop
		nop 
SINT6	.space 4*16
SINT7	.space 4*16
INT3:	rete
		nop
		nop
		nop  
HPINT:	rete
		nop
		nop
		nop  
RINT1:	B		RECIV               ;RINT1接收中断向量
		nop
		nop
		nop
XINT1:	B		XT					;XINT1发送中断向量
		nop
		nop
		nop
;*************************
start:	LD 		#0,DP
		STM		#200h,SP
		STM 	#07FFFh,SWWSR
		STM 	#1060h,PMST  
		STM		#3FFFH,IFR   
        
        STM		#4000H,AR0
		STM		#1000H,AR2
		  
        CALL	INBSP					;串口0和PCM编解码器初始化
        STM		#3FFFH,IFR  		
		STM		#0400H,IMR				;ENABLE RINT1 INTERRUPT 
		RSBX	INTM					;开中断
;*************************				
WAIT:		B 		WAIT   
;*************************        
INBSP	STM 	#SPCR11,SPSA1  
		STM 	#0000h,McBSP1  			;RESET R
		NOP
		NOP
		
		STM 	#SPCR21,SPSA1  
		STM 	#0000h,McBSP1  			;RESET X	
		NOP
		NOP
		
		STM 	#RCR11,SPSA1
		STM 	#K_RCR11,McBSP1 
		NOP
		NOP   
		
		STM 	#XCR11,SPSA1
		STM 	#K_XCR11,McBSP1
		NOP
		NOP
		
		STM 	#PCR1,SPSA1
		STM 	#K_PCR1,McBSP1
		NOP
		NOP
	    
	   
		STM 	#RCR21,SPSA1
		STM 	#K_RCR21,McBSP1 
		NOP
		NOP 
		
		STM 	#XCR21,SPSA1
		STM 	#K_XCR21,McBSP1
		NOP
		NOP   
		
		STM 	#MCR11,SPSA1
		STM 	#K_MCR11,McBSP1
		NOP
		NOP  
	
		STM 	#MCR21,SPSA1
		STM 	#K_MCR21,McBSP1
		NOP
		NOP  
		
		STM 	#RCERA1,SPSA1
		STM 	#K_RCERA1,McBSP1
		NOP
		NOP  
		
		STM 	#RCERB1,SPSA1
		STM 	#K_RCERB1,McBSP1
		NOP
		NOP 
		
		STM 	#XCERA1,SPSA1
		STM 	#K_XCERA1,McBSP1
		NOP
		NOP 
		
		STM 	#XCERB1,SPSA1
		STM 	#K_XCERB1,McBSP1
		NOP
		NOP 
		STM 	#SPCR11,SPSA1
		STM 	#K_SPCR11,McBSP1    ;ENBLE R
		NOP
		NOP
						   
		STM 	#SPCR21,SPSA1
		STM 	#K_SPCR21,McBSP1    ;ENBLE X
		NOP
		NOP	
		RET
;*********************************		
RECIV:  STM		#3FFFH,IFR			;串口0的接收中断服务程序
		LDM		DRR11,A 
	    STLM	A,DXR11
	    STL		A,*AR0+
		BANZ	RECIV1,*AR2-
		STM		#4000H,AR0
		STM		#1000H,AR2		   		
RECIV1:  RETE
;***************
XT:		RETE
;***************
		.end