5-LED模拟交通灯单片机C语言程序设计实训100例

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#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit RED_A=P0^0; //东西向灯
6 _  Z- k( a, r. u% K) ~sbit YELLOW_A=P0^1;
sbit GREEN_A=P0^2;
sbit RED_B=P0^3; //南北向灯
sbit YELLOW_B=P0^4;
sbit GREEN_B=P0^5;
& z* ~9 |( N/ R: P4 F/ guchar Flash_Count=0,Operation_Type=1; //闪烁次数，操作类型变量  
# N$ P: Z- z+ M5 J' v/ N' ^9 d
# z* O" ]( w5 _//延时
void DelayMS(uint x)
0 L, y; f3 O" X( L* n/ ~{
; K3 a9 ^( N0 c8 q2 W6 [uchar i;
3 B4 e& T4 Y- Hwhile(x--) for(i=0;i<120;i++);
) r/ C1 w  h$ Y# {. U- t}
//交通灯切换
. l; K/ t  r3 f# N+ R  ?void Traffic_Light()
{
! O6 G9 p% |: q1 `% wswitch(Operation_Type)
{
/ G5 g) C8 e- [' n  @; r& Gcase 1: //东西向绿灯与南北向红灯亮
RED_A=1;YELLOW_A=1;GREEN_A=0;
9 Z3 @3 L) [- w% A3 NRED_B=0;YELLOW_B=1;GREEN_B=1;
DelayMS(2000);
Operation_Type=2;
break;
case 2: //东西向黄灯闪烁，绿灯关闭
% h- H: [  w) l$ i$ pDelayMS(300);
YELLOW_A=~YELLOW_A;GREEN_A=1;
  ~( A4 n/ E% K% Gif(++Flash_Count!=10) return; //闪烁 5 次
& Z. t7 A( t9 I- n" y. L& N6 Z) Y( CFlash_Count=0;
$ r  R$ I0 J7 v- j9 vOperation_Type=3;
* j- r1 w8 {; h3 N4 O) d/ Obreak;
. p& r9 E7 E" d4 |, Dcase 3: //东西向红灯，南北向绿灯亮
RED_A=0;YELLOW_A=1;GREEN_A=1;
RED_B=1;YELLOW_B=1;GREEN_B=0;
DelayMS(2000);
Operation_Type=4;
break;
case 4: //南北向黄灯闪烁 5 次
1 a2 Q0 c- _5 }7 b5 c$ {DelayMS(300);
8 U6 Q# N# k4 h3 ~% ~YELLOW_B=~YELLOW_B;GREEN_B=1;
: m) ^. S9 x7 X. ]if(++Flash_Count!=10) return;
Flash_Count=0;
Operation_Type=1;
}
% |" {! [+ A. y7 b- n+ O* y- r}
//主程序
void main()
% v  p, ?2 |, d* Z, @* M& `{
8 f5 p4 k  W0 m0 O, Pwhile(1) Traffic_Light();
}  
( c9 s2 s4 C1 l  {

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