C51单片机实现数码管随机模拟显示乘法口诀

#include <REGX52.H> #include <stdlib.h> unsigned char shumaguan[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x48}; unsigned int t=0; unsigned int x=0,y=0,k=0; unsigned char keyNum=0; sbit2_7=2^7; sbit2_6=2^6; void Delay(unsigned int xms) //设置延时函数 { unsigned char i, j; while(xms--) { i = 2; j = 239; do { while (--j); } while (--i); } } void Timer0_Init() //配置定时器中断 { TMOD &= 0xF0; //设置定时器模式 TMOD |= 0x01; //设置定时器模式 TL0 = 0x18; //设置定时初始值 TH0 = 0xFC; //设置定时初始值 TF0 = 0; //清除TF0标志 TR0 = 1; //定时器0开始计时 ET0=1; EA=1; PT0=1; } unsigned char key() //检测按键 { if(P3_0==0) { Delay(20); while(P3_0==0); Delay(20); keyNum++; } return keyNum; } void shuzi(unsigned char location,number) //数码管位数和显示数字 { P2_7=1;P2_6=0; switch(location) { case 1:P0_0=0;P0_1=1;P0_2=1;P0_3=1;P0_4=1;P0_5=1;P0_6=1;P0_7=1;break; case 2:P0_0=1;P0_1=0;P0_2=1;P0_3=1;P0_4=1;P0_5=1;P0_6=1;P0_7=1;break; case 3:P0_0=1;P0_1=1;P0_2=0;P0_3=1;P0_4=1;P0_5=1;P0_6=1;P0_7=1;break; case 4:P0_0=1;P0_1=1;P0_2=1;P0_3=0;P0_4=1;P0_5=1;P0_6=1;P0_7=1;break; case 5:P0_0=1;P0_1=1;P0_2=1;P0_3=1;P0_4=0;P0_5=1;P0_6=1;P0_7=1;break; case 6:P0_0=1;P0_1=1;P0_2=1;P0_3=1;P0_4=1;P0_5=0;P0_6=1;P0_7=1;break; } P2_7=0;P2_6=1; P0=shumaguan[number]; Delay(1); P0=0x00; } void Timer0_Routine() interrupt 1 //中断函数 { TL0 = 0x18; //设置定时初始值 TH0 = 0xFC; //设置定时初始值 t++; } void main() { Timer0_Init(); while(1) { keyNum=key(); keyNum=keyNum%2; if(keyNum==1) { srand(t); x=rand()%9+1; srand(t/x); y=rand()%9+1; k=x*y; while(keyNum==1) { shuzi(1,x); shuzi(3,y); shuzi(4,10); shuzi(5,k/10); shuzi(6,k%10); keyNum=key(); } } } }