sanjiao.asm

dsp2407源程序

;此程序为产生连续两个幅度不一样的三角波
;DACO输出波形啊


             .include  	"F2407REGS.H" 	;引用头部文件
			.def      	_c_int0

			.bss DAC0_VAL,1
			.bss DAC1_VAL,1
			.bss DAC2_VAL,1
			.bss DAC3_VAL,1  
			.bss flag,1
			
;（2）主程序:
        	.text
_c_int0    
	   	SETC 	INTM
		CLRC 	SXM
		CLRC 	OVM
		CLRC 	CNF	
		LDP 	#0E0H
		SPLK	#83FEH,SCSR1			;CLKIN=6 M,CLKOUT=24 M 
		SPLK	#0E8h,WDCR				;关看门狗
		LDP		#0
		SPLK	#0001h,IMR				;允许INT1中断
		SPLK	#0FFFFh,IFR				;清所有中断标志 
        SPLK 	#0H,flag
	    LDP #0000h ;Set date page pointer to 0
		SPLK #0000h,DAC0_VAL ;Load 03FFh into DAC0_VAL register 
		SPLK #0000h,DAC1_VAL
		SPLK #0000h,DAC2_VAL
		SPLK #0000h,DAC3_VAL ;Load 07FFh into DAC1_VAL register
	    ZAC
	  	   
	   
WAIT1:	LACL DAC0_VAL
		ADD #0005h
		SACL DAC0_VAL 
		OUT DAC0_VAL,0000h ;Write 07FFh to the DAC1 register
		OUT DAC3_VAL,0004h ;Start DAC conversions by writing a 
	    SUB #0CCCH  
	    
		BCND WAIT1,LEQ 
		ZAC
		                
		
		
WAIT2:	LACL DAC0_VAL
		SUB #0005h
		SACL DAC0_VAL  
		OUT DAC0_VAL,0000h
		OUT DAC3_VAL,0004h 
		SUB #0010H 
		
		BCND WAIT2,GEQ 
		ZAC  
		
WAIT3:	LACL DAC0_VAL
		ADD #0005h
		SACL DAC0_VAL 
		OUT DAC0_VAL,0000h ;Write 07FFh to the DAC1 register
		OUT DAC3_VAL,0004h ;Start DAC conversions by writing a 
	    SUB #0666H  
	    
		BCND WAIT3,LEQ 
		ZAC
		                
		
		
WAIT4:	LACL DAC0_VAL
		SUB #0005h
		SACL DAC0_VAL  
		OUT DAC0_VAL,0000h
		OUT DAC3_VAL,0004h 
		SUB #0010H 
		
		BCND WAIT4,GEQ 
		ZAC 		
		
		
		B WAIT1