5-LED模擬交通燈單片機C語言程序設計實訓100例

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' C, c% {3 s% V#include<reg51.h>
#define uchar unsigned char
" D6 n" x3 {0 c+ d3 S" r8 \$ k! U#define uint unsigned int
  G! X& Q+ w- i+ s7 ssbit RED_A=P0^0; //東西向燈
2 U% B7 z) o7 N+ v1 Fsbit YELLOW_A=P0^1;
sbit GREEN_A=P0^2;
sbit RED_B=P0^3; //南北向燈
sbit YELLOW_B=P0^4;
& h4 U! J+ L' g9 ]sbit GREEN_B=P0^5;
. W) Z4 N) S( c3 uuchar Flash_Count=0,Operation_Type=1; //閃爍次數，操作類型變量  

! X2 R9 N# Q5 I2 z! k2 Z//延時
void DelayMS(uint x)
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uchar i;
while(x--) for(i=0;i<120;i++);
}
$ b- q5 {' Y) h2 {$ d//交通燈切換
2 l0 m( Q: u1 }/ e2 k4 ?# U+ }void Traffic_Light()
{
switch(Operation_Type)
{
case 1: //東西向綠燈與南北向紅燈亮
; c% D# C% J$ ?# H7 MRED_A=1;YELLOW_A=1;GREEN_A=0;
RED_B=0;YELLOW_B=1;GREEN_B=1;
DelayMS(2000);
Operation_Type=2;
8 m, P2 u* o4 R/ I8 Sbreak;
case 2: //東西向黃燈閃爍，綠燈關閉
7 l4 g- s3 R$ @9 O7 IDelayMS(300);
YELLOW_A=~YELLOW_A;GREEN_A=1;
if(++Flash_Count!=10) return; //閃爍 5 次
Flash_Count=0;
Operation_Type=3;
break;
. O$ w- R% v' {case 3: //東西向紅燈，南北向綠燈亮
! T3 v# o( e) q8 f& dRED_A=0;YELLOW_A=1;GREEN_A=1;
9 d  _8 K" `" S. qRED_B=1;YELLOW_B=1;GREEN_B=0;
DelayMS(2000);
Operation_Type=4;
8 ?; J! T0 o% t1 bbreak;
case 4: //南北向黃燈閃爍 5 次
/ y2 Q/ ~7 y! W" n6 fDelayMS(300);
) v' j. e3 |$ x0 `! [3 pYELLOW_B=~YELLOW_B;GREEN_B=1;
if(++Flash_Count!=10) return;
* i7 \* u# k, ~- b( k& ~% F! T1 p6 o7 VFlash_Count=0;
; h6 Z% S  L' F2 `7 v9 H  yOperation_Type=1;
4 L" d! C9 c; m* b& `' Q}
. ~- K7 m) j( D5 k; j}
/ L2 b: h1 G9 N+ N' u* t( w//主程序
void main()
{
while(1) Traffic_Light();
7 x: a; @* J2 c' K; c$ h0 S" L6 T}  
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