數(shù)碼管動(dòng)態(tài)顯示

1、/作者：王攀/時(shí)間：2010-11-3/課題：九江學(xué)院/數(shù)碼管顯示543210/*/BUF0 DATA 30HBUF1 DATA 31HBUF2 DATA 32HBUF3 DATA 33HBUF4 DATA 34HBUF5 DATA 35HCOUNTER DATA 40HDISP64 DATA 36HRUNCOUNTER DATA 38H/程序開始/*ORG 0000HLJMP MAINORG 0003HLJMP INTORG 0100HMAIN:MOVSP,#7FHCLR IT0;啟動(dòng)外中斷，低電平觸發(fā)SETB EX0SETB EAMOV PCON,#02H ;進(jìn)入掉電方式MOV P0,#0

2、FFHMOV R0,#BUF0MOV R1,#06HCLEAR:MOV R0,#0INC R0DJNZ R1,CLEARMOV DPTR,#TABLE MOV COUNTER,#0 ;位數(shù)初始化為0WHILE:CLR RS0 CLR RS1MOV R3,#BUF0 ;r3內(nèi)容30hMOV R4,COUNTER ;r4內(nèi)容位數(shù)值MOV DISP64,#80 ;顯示次數(shù)80次,64次過快LCALL MOVE ;調(diào)用移位子函數(shù)MOV A,COUNTER CJNE A,#6,FBUF0 ;位數(shù)小于6給最低位賦值，否則退出LJMP CDISFBUF0: ;賦值MOVC A,A+DPTRMOVBUF0,A

3、INC COUNTER CDIS: LCALL DISP ;調(diào)用顯示函數(shù)64次DJNZ DISP64,CDISDJNZ RUNCOUNTER,XUNMOV PCON,#02HXUN:LJMP WHILE ;循環(huán)MOVE:MOV A,R4CJNE A,#06H,NEXT NEXT:JNC MORE5; 沒有借位表示counter大于5，跳轉(zhuǎn)MCESS:MOV A,R4JZ EXITADD A,R3;得到buf+counter地址MOV R0,A;將地址送R0MOV A,R4ADD A,R3DEC A;得到buf+counter-1地址MOV R1,A;暫存地址MOV A,R1;將buf+coun

4、ter-1中內(nèi)容取出傳遞給AMOV R0,A;將A中內(nèi)容傳給buf+counterDEC R4CJNE R4,#0,MCESSLJMP EXITMORE5:MOV R5,BUF5;將buf5寄存于r5MOV R4,#05HMCESS1:MOV A,R4ADD A,R3MOV R0,A;將地址送R0MOV A,R4ADD A,R3DEC A;得到buf+counter-1地址MOV R1,A;暫存地址MOV A,R1;將buf+counter-1中內(nèi)容取出傳遞給AMOV R0,A;將A中內(nèi)容傳給buf+counterDEC R4CJNE R4,#0,MCESS1MOV BUF0,R5EXIT:RETDISP:CLR RS0SETB RS1MOVR1,#6MOV R0,#BUF0MOV37H,#7FHLOOP1:MOV A,R0MOVP0,AMOVP2,37HINCR0MOVA,37HRRAMOV37H,ALCALL DELAYMOVP2,#0FFH;關(guān)位選DJNZ R1,LOOP1RETINT:MOV PCON,#00HLCALL DELAYMOV P2,#0FFHMOV RUNCOUNTER,#18RETI/延時(shí)1ms/*DELAY: ;2+(247*2+3)*2+4MOVR7,#2LOOP:MOVR6,