5-LED模拟交通灯单片机C语言程序设计实训100例

2369353531

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
) D+ p# `% z7 _6 `sbit RED_A=P0^0; //东西向灯
sbit YELLOW_A=P0^1;
7 W3 [& X6 T  f. `2 C- q7 {sbit GREEN_A=P0^2;
7 p$ a; q8 M9 Y4 Z; o  E& D. \sbit RED_B=P0^3; //南北向灯
sbit YELLOW_B=P0^4;
sbit GREEN_B=P0^5;
( e. o1 `/ h" ~. w) q) v7 huchar Flash_Count=0,Operation_Type=1; //闪烁次数，操作类型变量  
  P* N+ [. N# c8 i' T7 y
) H. ~! \1 y5 F' r//延时
void DelayMS(uint x)
{
uchar i;
4 S% M$ O+ L' P0 l* bwhile(x--) for(i=0;i<120;i++);
}
; X' J' u. q; v1 ~//交通灯切换
; d! U/ t9 r. n+ f: A( U" Yvoid Traffic_Light()
( o7 T/ M( U. S$ W- W{
- l/ u9 X) D* c$ j. v4 tswitch(Operation_Type)
{
9 F7 g, f$ o. e! c) [9 Ycase 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;
( l; @' R" o, E" w/ i8 `DelayMS(2000);
Operation_Type=2;
+ u; w+ i4 u+ c8 Ibreak;
* i, O* _/ n. a2 G8 Pcase 2: //东西向黄灯闪烁，绿灯关闭
. Q! j* X5 D( H9 B' k0 uDelayMS(300);
$ _' ?) f% @* n: |4 W2 M* C" G& eYELLOW_A=~YELLOW_A;GREEN_A=1;
if(++Flash_Count!=10) return; //闪烁 5 次
) z+ _6 x; A% N4 HFlash_Count=0;
Operation_Type=3;
break;
# T/ Z6 B0 J: G# b6 v- N# ocase 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);
$ _6 O4 I1 y/ Q1 o8 L% z6 m8 b8 SOperation_Type=4;
" V1 e- p' {( V6 N0 hbreak;
case 4: //南北向黄灯闪烁 5 次
9 X2 y# O5 e5 u1 |DelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
if(++Flash_Count!=10) return;
, j% W4 D& E4 I/ c0 WFlash_Count=0;
Operation_Type=1;
}
6 S" c! S+ B; x9 Q8 o}
7 x( [: L- ?# Y- T$ n! L# I//主程序
void main()
{
; ]5 ^' f3 b$ a4 Nwhile(1) Traffic_Light();
}  
- \; @' K( [* A) Y; ]6 I


: a8 R# d9 Q; A# O6 I( |