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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#include<reg51.h>
. x4 C0 S, N0 A8 l) Y! L" u#define uchar unsigned char
#define uint unsigned int
sbit RED_A=P0^0; //東西向燈
4 W% g% J: c* i& b$ p& Z6 M: |5 {sbit YELLOW_A=P0^1;
8 F0 D7 I- l7 Osbit GREEN_A=P0^2;
sbit RED_B=P0^3; //南北向燈
sbit YELLOW_B=P0^4;
sbit GREEN_B=P0^5;
uchar Flash_Count=0,Operation_Type=1; //閃爍次數，操作類型變量  

//延時
void DelayMS(uint x)
4 H: O' U7 Z& G- `+ M1 J{
3 n+ z' p  O' c7 a# xuchar i;
while(x--) for(i=0;i<120;i++);
3 T+ T2 n1 E/ a/ C& p& @1 J) |}
//交通燈切換
: u* {5 @0 W- k/ Q2 Ovoid Traffic_Light()
{
switch(Operation_Type)
' Z1 w2 L* p$ x; I{
case 1: //東西向綠燈與南北向紅燈亮
; ~4 b8 f2 f/ r  K' @3 \0 fRED_A=1;YELLOW_A=1;GREEN_A=0;
8 l. o* b1 H  g$ l& g# wRED_B=0;YELLOW_B=1;GREEN_B=1;
DelayMS(2000);
' k, L. i' S' Y/ @Operation_Type=2;
# P; Y; J0 N3 f3 d0 ^" F$ N9 M4 fbreak;
# s+ g0 b5 a/ Z# V. T2 |case 2: //東西向黃燈閃爍，綠燈關閉
* n: h3 o9 Q# a  z9 cDelayMS(300);
. U% g' M; O! r4 cYELLOW_A=~YELLOW_A;GREEN_A=1;
- w  B6 Z$ _- [9 w2 bif(++Flash_Count!=10) return; //閃爍 5 次
" ?$ X. h# [; \Flash_Count=0;
Operation_Type=3;
break;
" Q4 @( {6 g2 bcase 3: //東西向紅燈，南北向綠燈亮
RED_A=0;YELLOW_A=1;GREEN_A=1;
RED_B=1;YELLOW_B=1;GREEN_B=0;
7 B* m0 Q& M3 F2 S# N3 ?DelayMS(2000);
Operation_Type=4;
' L/ M& q: D7 p) y7 ~- ubreak;
case 4: //南北向黃燈閃爍 5 次
DelayMS(300);
. Y9 ~( q& x* K: X' XYELLOW_B=~YELLOW_B;GREEN_B=1;
2 ?' E$ r( Y* ~0 x, ^) s" ^if(++Flash_Count!=10) return;
7 Z# j  O% F8 k* w0 t" |' M  XFlash_Count=0;
Operation_Type=1;
}
. \0 G4 C4 O+ `# W" I}
9 \/ s  `7 Y! ~6 O( T( y//主程序
void main()
{
while(1) Traffic_Light();
}  
+ S* `: q7 ]4 X8 j7 ?
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