mega16单片机实现交通灯protues仿真，12个LED，8个数码管显示时间。程序+原理图

#include <iom16v.h> #include <macros.h> #define uchar unsigned char #define uint unsigned int uchar moshi_flag=1; #pragma data:code //数码管码值 const table[]={~0x3f,~0x06,~0x5b,~0x4f,~0x66,~0x6d,~0x7d, ~0x07, ~0x7f,~0x6f,~0x77,~0x7c,~0x39,~0x5e,~0x79,~0x71}; void delay(uint ms)//延时函数 { uint i; while(--ms) for(i=0;i<1154;i++); } void show(uchar j)//数码管显示单个管 { PORTB|=BIT(0); PORTA&=table[j]; PORTB&=~BIT(0); PORTA|=0XFF; PORTA&=BIT(j-1); PORTB|=BIT(1); PORTB&=~BIT(1); PORTA|=0XFF; delay(3); } void show_num(uint num)//数码管显示数字 { uchar i; for(i=0;i<5;i++) { switch (i){ case 0:showgundong(num/1000,i);break; case 1:showgundong(num%1000/100,i);break; case 2:showgundong(num%100/10,i);break; case 3:showgundong(num%10,i);break; } } } void showgundong(uchar dat,uchar num)//数码管滚动显示 { PORTB|=BIT(0); PORTA&=table[dat]; PORTB&=~BIT(0); PORTA|=0XFF; PORTA&=BIT(num); PORTB|=BIT(1); PORTB&=~BIT(1); PORTA|=0XFF; delay(2); } uchar key_press()//按键函数 { uchar i; DDRD|=0XF0; PORTD|=0XF0; DDRD&=0X0F; i=PIND; i&=0xf0; if(i==0xf0) { return 0; } else { return 1; } } uchar key_scan()//检测按键 { uchar key; delay(10); if(key_press()) { key=PIND; key&=0xf0; switch(key) { case 0xb0: key=1; moshi_flag=1; break; case 0x70: key=2; moshi_flag=0; break; //default:key=16; } //while(key_press()); } return key; } void main()//主函数 { uint i,j,num,num1=0,count =0,anjian; DDRA=0XFF;//端口初始化 DDRB|=BIT(0); DDRB|=BIT(1); DDRD|=BIT(PD0); PORTD|=BIT(PD0); DDRC=0XFF; PORTC=0XFF; while(1) { anjian=key_scan();// show_num(num);//数码管显示 delay(10); count++; if(count==50)//时间1s { count=0; num1++; } if(moshi_flag==1)//白天模式 { num = num1*100+num1; if(num1>=0&&num1<=30) { if(num1>0&&num1<=26) { PORTC&=~BIT(0);//亮 PORTC|=BIT(1);//灭 PORTC|=BIT(2); } if(num1>26&&num1<=30) { PORTC|=BIT(0); PORTC&=~BIT(1); PORTC|=BIT(2); } PORTC&=~BIT(3);//亮 PORTC|=BIT(4);//灭 PORTC|=BIT(5); } if(num1>30&&num1<60) { PORTC|=BIT(0); PORTC|=BIT(1); PORTC&=~BIT(2); if(num1>30&&num1<56) { PORTC|=BIT(3); PORTC&=~BIT(5); PORTC|=BIT(4); } if(num1>56&&num1<60) { PORTC|=BIT(3); PORTC&=~BIT(4); PORTC|=BIT(5); } if(num1==59) num1=0; } } if(moshi_flag==0)//夜间模式，黄灯闪烁 { num=0;num1=0; if(count>=0&&count<25) { PORTC|=BIT(0); PORTC&=~BIT(1); PORTC|=BIT(2); PORTC|=BIT(3); PORTC&=~BIT(4); PORTC|=BIT(5); } else { PORTC|=BIT(1); PORTC|=BIT(4); } } } }