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
5 m5 D9 p8 V9 Q7 P! _. Zsbit RED_A=P0^0; //东西向灯
sbit YELLOW_A=P0^1;
1 v' ]. ~" p& R0 \% P/ }! [" msbit GREEN_A=P0^2;
sbit RED_B=P0^3; //南北向灯
$ `, e, a' p& q+ asbit YELLOW_B=P0^4;
sbit GREEN_B=P0^5;
uchar Flash_Count=0,Operation_Type=1; //闪烁次数，操作类型变量  
# c* t/ \8 Z" g3 i  R
//延时
void DelayMS(uint x)
{
$ @8 ^5 q( P( P, V+ g+ s( {/ o( D% ouchar i;
while(x--) for(i=0;i<120;i++);
}
  m7 X8 z# {6 C, M! Q//交通灯切换
void Traffic_Light()
{
9 Z' ]# ]9 d7 i) g& S5 E9 aswitch(Operation_Type)
% M' Y' R, X% ^3 }& G( ?{
2 X3 v0 I2 o' Y4 J: Jcase 1: //东西向绿灯与南北向红灯亮
RED_A=1;YELLOW_A=1;GREEN_A=0;
7 U6 F! E+ g7 t* w& h# nRED_B=0;YELLOW_B=1;GREEN_B=1;
3 H4 e! B3 E2 L' vDelayMS(2000);
Operation_Type=2;
) E8 d! s. o& n- }" J) _; Z" P* P; ~break;
7 L# @, S  E, N% Ncase 2: //东西向黄灯闪烁，绿灯关闭
0 M5 ~! H( R( X  ?7 v% S1 PDelayMS(300);
% o+ G& ?  v& M9 F" k. a6 n. \4 dYELLOW_A=~YELLOW_A;GREEN_A=1;
8 e5 e" g: q* }0 Q- l/ c. s3 s/ }if(++Flash_Count!=10) return; //闪烁 5 次
& g9 S5 A/ W% h  m% |Flash_Count=0;
0 ~7 Q7 O9 P( `/ x$ {2 }& ]% d( JOperation_Type=3;
break;
case 3: //东西向红灯，南北向绿灯亮
* c) n# c2 C; R( S, R& R7 |RED_A=0;YELLOW_A=1;GREEN_A=1;
" A$ s" Z( Z  Y; p+ m7 ORED_B=1;YELLOW_B=1;GREEN_B=0;
DelayMS(2000);
( n. P9 E8 S. \- w. S) VOperation_Type=4;
/ m! k& M" |7 W9 t* ]6 Vbreak;
case 4: //南北向黄灯闪烁 5 次
6 ?2 ]$ |0 G7 b) H7 RDelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
) q; X* E  v* [if(++Flash_Count!=10) return;
Flash_Count=0;
, m2 d. G& b+ K% I, g0 gOperation_Type=1;
}
}
% i. U; |7 F9 G$ I( G! M& D6 S//主程序
void main()
! E5 z. d* r$ s' x! k1 R{
while(1) Traffic_Light();
: b9 Y6 U! Q1 Z3 p; v}  

% J; P5 h5 y/ G7 u9 j  z
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