单片机控制一个4位的共阴数码管通电的状态下显示时间的程序答:include <reg52.h> define uint unsigned int define uchar unsigned char sbit PRESS1=P1^0;sbit PRESS2=P1^1;sbit PRESS3=P1^2;uint a[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//0到9 uint b[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};int miao=...
单片机 用51单片机显示一个数码管轮流显示9到0再从0到9每隔一秒出现一 ...答:ORG 0000H MOV DPTR,#TAB MOV P0,#0FFH LOP:LOOP0:MOV 20H,#9 MOV R0,#10 LOOP1:MOV A,20H; 9-0 MOVC A,@A+DPTR MOV P0,A DEC 20H CALL DELL;YANSHI DJNZ R0,LOOP1 MOV 20H,#0;0-9 MOV R0,#10 LOOP2:MOV A,20H; 0-9 MOVC A,@A+DPTR MOV P0,A INC 20H CALL DELL;...
使用51单片机实现,两位数码管实现秒计时,显示秒,能用独立按键控制开始...答:#0B0HMOV TH1,#0ECHMOV TL1,#078HMOV KEYVAL,#2MOV 33H,#10HMOV 34H,#10HMOV 35H,#10HMOV 36H,#10HMOV CLK,#0SETB IT0SETB EX0CLR TR0CLR ET0MOV R2,#0SETB TR1SETB ET1SETB EALOOP:MOV A,KEYVALLOOP1:JNZ LOOP2 ;启动SETB TR0SETB ET0SJMP LOOPLOOP2:DEC AJNZ LOOP3 ;暂...
51单片机按键控制数码管数据的加减答:DATEQU 30HSCANLEDEQU 32HFSDATEQU 33HORG 0000HLJMP MAINORG 000BHLJMP T0ISRORG 0030HMAIN:MOV SP,#5FHMOV TMOD,#01HMOV TH0,#0F4HMOV TL0,#048HMOV P2,#00HMOV SCANLED,#0MOV 30H,#2MOV 31H,#0MOV FSDAT,#20SETB EASETB ET0SETB TR0LOOP:JB P3.0,$JNB P3.0,$DEC FS...