ch11_intr2.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:INTR2.ASM
     ;TEST TIMER0 INTERRUPT(MODE 1)
     ;
     COUNT   EQU     9217    	        ;10ms FOR XTAL=11.0592MHz
     ;
     CHK_BIT REG     P3.2
     DIGIT1  REG     P1.4
     DIGIT2  REG     P1.5
     ;
     DISP    EQU     30H
     ;
             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     DISP,#34H   	;DISPLAY '3''4'
             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    		;WAITTING
     ;	
     ;TF0=1
     INT_TIMER0
             CPL     CHK_BIT
             CLR     TF0     		;CLEAR TF0
             MOV     TH0,#(65536-COUNT)/256
             MOV     TL0,#(65536-COUNT).MOD.256
             MOV     A,DISP
             ANL     A,#00001111B	;GET LOW NIBBLES
             SETB    ACC.5        	;BIT5,BIT4=10
             MOV     P1,A
             ACALL   DELAY
             MOV     A,DISP
             SWAP    A
             ANL     A,#00001111B
             SETB    ACC.4         	;BIT5,BIT4=01
             MOV     P1,A
             ACALL   DELAY
             CLR     P1.4
             CLR     P1.5
             RETI
     ;
     DELAY  MOV     R0,#00H
             DJNZ    R0,$
             RET