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;...
求51单片机24秒倒计时器程序设计答:include "reg51.h"sbit COM2 = P2^0;sbit COM1 = P2^1;unsigned char DT[10]={0x03,0x9F,0x25,0x0D,0x99,0x49,0x41,0x1F,0x01,0x09};void delay(void);void delay1(void);void main (){ unsigned char i,k;P0=0x00;P2=0x00;delay();P0=0xFF;P2=0xFF;delay();i=0;k...
51单片机汇编语言写串口程序答:ORG 0000H SJMP 0050H ORG 0023H LJMP S_INT TAB:DB 20H,49H,20H,47H,45H,54H,20H,'NULL'ORG 0050H MOV TMOD,#20H MOV TH1,#0FDH MOV TL1,#0FDH SETB TR1 SETB SM1 CLR SM0 SETB EA SETB ES MOV R0,#30H MOV A,#1H MAIN:SETB REN ACALL DELAY JNZ MAIN MOV R2,#0 MOV ...
51单片机编程,汇编语言,实现外部RAM 4000H 存放20个数据,正数传送到内 ...答:DATM:MOV DPTR,#4000H MOV R2,#20 MOV R0,#30H MOV R1,#50H LOOP:MOVX A,@DPTR JB ACC.7,LOOP1 MOV @R1,A INC R1 SJMP LOOP2 LOOP1:MOV @R0,A INC R0 LOOP2:INC DPTR DJNZ R2,LOOP RET