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>
* q. h2 q/ D4 l( a9 o# D' B% t7 z#define uchar unsigned char
" @% ?  j: |% h' p9 P2 Z# S#define uint unsigned int
sbit RED_A=P0^0; //东西向灯
" t" E& V4 Z# t) gsbit YELLOW_A=P0^1;
+ J& C) ]+ o2 d( x3 \sbit GREEN_A=P0^2;
sbit RED_B=P0^3; //南北向灯
9 E/ }- k2 u# m5 |" F9 v, lsbit YELLOW_B=P0^4;
sbit GREEN_B=P0^5;
( d; L* Z+ {, Y% X$ s9 Cuchar Flash_Count=0,Operation_Type=1; //闪烁次数，操作类型变量  

/ A7 r' H; u, ~//延时
8 T5 p! ^7 T+ J/ r8 `2 B& n8 O% }void DelayMS(uint x)
) f' @5 E5 N& s1 Y0 c2 G0 h- R{
$ ?  e) N: Y) l+ M% |! Ouchar i;
while(x--) for(i=0;i<120;i++);
8 V9 W1 ~- l! P2 P/ E- C6 Z! D}
//交通灯切换
void Traffic_Light()
{
switch(Operation_Type)
- a1 m1 s- `, t+ u{
" l# I0 L/ e/ K( C2 n: v: j0 r; tcase 1: //东西向绿灯与南北向红灯亮
RED_A=1;YELLOW_A=1;GREEN_A=0;
RED_B=0;YELLOW_B=1;GREEN_B=1;
( N" A; Z% u& O2 UDelayMS(2000);
* E1 E- }1 C, Z+ l# ]+ r1 nOperation_Type=2;
break;
case 2: //东西向黄灯闪烁，绿灯关闭
DelayMS(300);
0 s( u$ V, W& \. @  R% U5 nYELLOW_A=~YELLOW_A;GREEN_A=1;
, ^* s% m; n) l3 e) N* R* x5 B4 Wif(++Flash_Count!=10) return; //闪烁 5 次
Flash_Count=0;
' V8 @& ^, o3 ^; K8 S. H4 ZOperation_Type=3;
break;
% I7 G$ U7 _" k7 ~* H; Scase 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;
% T$ }, `0 }) tDelayMS(2000);
Operation_Type=4;
break;
case 4: //南北向黄灯闪烁 5 次
' s2 S3 V. W( [* [# }" kDelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
if(++Flash_Count!=10) return;
6 N/ `* t3 y. B) }8 W% FFlash_Count=0;
! ~% r( s. G8 z1 XOperation_Type=1;
}
$ U6 C" G& H5 a" Z8 b# J0 I3 s! [}
7 d* C0 f) t' Z" K  k3 ]% C# x//主程序
void main()
* a0 |+ b' r1 T4 g{
/ I+ l. q5 m; {. x' x8 |% }while(1) Traffic_Light();
* a* @% }$ s) J9 h) {}  
  H1 c: A8 \5 O; @/ K# V) x* n
: `1 y% k5 S0 C$ N
# d; M' y  f$ L! \1 g  {
4 l# F' }8 X9 ~