ch11_intr1.asm

51单片机基础篇 对于有一定基础的人看看 包含书中所以的源代码

     ;PROGRAM NAME:INTR1.ASM
     ;TEST TIMER0 INTERRUPT(MODE 1)
     ;
     COUNT    	EQU  	9217      	;10ms FOR XTAL=11.0592MHz
     CHK_BIT	REG    	P3.2
     ;
               	ORG    	0000H
               	LJMP   	RESET
               	ORG    	0003H      	;INT0 INTERRUPT
               	RETI
               	ORG    	000BH      	;TIMER0 INTERRUPT
               	LJMP   	INT_TIMER0
               	ORG    	0013H       	;INT1 INTERRUPT
               	RETI
               	ORG    	001BH     	;TIMER1 INTERRUPT
               	RETI
     		ORG	0023H		;SERIAL INTERRUPT
     		RETI
     ;
     RESET     	MOV  	R0,#00H
               	DJNZ 	R0,$  		;WAIT
               	CLR  	CHK_BIT
               	MOV  	SP,#40H
     ;
               	MOV  	A,TMOD
               	ANL  	A,#11110000B
               	CLR  	ACC.3     	;GATE=0
               	CLR  	ACC.2     	;C/T=0
               	CLR   	ACC.1     	;TIMER0 M1=0
               	SETB  	ACC.0     	;TIMER0 M0=1
               	MOV   	TMOD,A
               	MOV   	TH0,#(65536-COUNT)/256
               	MOV   	TL0,#(65536-COUNT).MOD.256
               	CLR   	TF0       	;CLEAR TF0
               	SETB  	TR0
     ;
               	SETB  	PT0
               	SETB  	ET0       	;ENABLE TIMER0 INTURRUPT
               	SETB  	EA         	;ENABLE SYSTEM INTERRUPT
     ;
     LOOP      	SJMP  	LOOP
     ;
     ;TF0=1
     INT_TIMER0
               	CPL   	CHK_BIT
               	CLR   	TF0       	;CLEAR TF0
               	MOV   	TH0,#(65536-COUNT)/256
               	MOV   	TL0,#(65536-COUNT).MOD.256
               	RETI
     ;