51单片机十秒简易计时器答:因为楼主说,(不要太大面积修改)。所以,就没有敢进行大面积的修改。只简单的改改,未必能好用,仅供参考: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...
汇编语言 51单片机 倒计时器程序答:R2 CJNE A,#100,T0E MOV R2,#0 MOV A,R0 JZ T003 DEC R0 SJMP T0ET003: MOV A,R1 JZ T004 DEC R1 MOV R0,#9T0E: RETIT004: CLR TR0 RETITABLE: ; 共阴极数码管显示代码表 DB 3FH,06H,5BH,4FH,66H ;01234 DB 6DH,7DH,07H,7FH,6FH ;56789END ...
用单片机设计一个时钟,可显示时和分,可以调时间,也要有闹钟功能,要有设...答:其实不用定时中断也能实现功能:include<reg51.h> 主函数 unsigned char tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};定义0-9数组 unsigned int tmp;定义变量 void delay(unsigned int xms)定义延时函数 {unsigned int j,i;for(i=0;i<xms;i++)for(j=0;j<100...