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=...
内部RAM20H-40H单元中任一填入33个数值,要求先在程序存储器输入表格,再...答:MOV R2,#33 ;循环初值 MOV R1,#20H ;内RAM起始地址 MOV DPTR,#2000H ;假设表格地址为2000H MOV R3,#0 ;控制取数顺序 S0:MOV A,R3 MOVC A,@A+DPTR ;从程序存储器取数 MOV @R1,A ;把取到的数送内RAM INC R3 INC R1 DJNZ R2,S0 SJMP END ...