求一个51单片机秒表设计原理图和程序(汇编程序)答:SECOND EQU 30H COUNT EQU 31H ORG 00H START: MOV SECOND,#00H MOV COUNT,#00H MOVDPTR,#TABLE S1:MOVA,SECOND MOVB,#10 DIVAB MOVCA,@A+DPTR MOVP0,A MOVA,B MOVCA,@A+DPTR MOVP2,A MOV TMOD,#01H S2:MOV TH0,#(65536-50000)/256 MOV TL0,#(65536-50000) MOD 256 SETBTR...
利用51单片机和3位数码管实现10分钟内的简易计时器答:修改如下:#include<reg51.h>#define uint unsigned int#define uchar unsigned char uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};sbit key1=P2^7;sbit key2=P2^6;sbit weiH=P3^0;sbit weiM=P3^1;sbit weiL=P3^...