5-LED模擬交通燈單片機(jī)C語言程序設(shè)計(jì)實(shí)訓(xùn)100例

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) l8 [; P4 r7 l* x4 M#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
, q( o7 }' _4 Nsbit RED_A=P0^0; //東西向燈
: v5 x, ?& F" S" V7 n/ R: N. P$ ]0 v2 b" Hsbit YELLOW_A=P0^1;
sbit GREEN_A=P0^2;
! k( R1 _! x: C* }  Ssbit RED_B=P0^3; //南北向燈
: e8 V9 Y5 ?; `, p0 Wsbit YELLOW_B=P0^4;
sbit GREEN_B=P0^5;
, G% Z) g) D* E4 B4 ~  L; Kuchar Flash_Count=0,Operation_Type=1; //閃爍次數(shù)，操作類型變量  
: I1 Y) i& t6 s( C
//延時(shí)
8 I; F  E+ U; d+ a& ]void DelayMS(uint x)
$ f9 C  n. ~; i" ?* L7 _2 j4 p/ g{
) j* C/ K+ ]& |  f$ nuchar i;
4 G8 v$ w0 n) ^5 v7 j/ C- m; [while(x--) for(i=0;i<120;i++);
}
//交通燈切換
void Traffic_Light()
* d7 D5 E- @7 S2 J: ~. L{
switch(Operation_Type)
4 s3 V' s" [! O{
case 1: //東西向綠燈與南北向紅燈亮
RED_A=1;YELLOW_A=1;GREEN_A=0;
0 `' `! Q0 F$ _1 C5 n; R& M4 URED_B=0;YELLOW_B=1;GREEN_B=1;
; K  z. s/ Q0 j9 p6 SDelayMS(2000);
/ i5 V% z2 z2 w) e: s$ mOperation_Type=2;
break;
9 {5 g) |8 ?( n( T% Q/ z/ Mcase 2: //東西向黃燈閃爍，綠燈關(guān)閉
DelayMS(300);
YELLOW_A=~YELLOW_A;GREEN_A=1;
if(++Flash_Count!=10) return; //閃爍 5 次
Flash_Count=0;
Operation_Type=3;
break;
case 3: //東西向紅燈，南北向綠燈亮
RED_A=0;YELLOW_A=1;GREEN_A=1;
: b  N) _+ I) O+ _RED_B=1;YELLOW_B=1;GREEN_B=0;
% H2 W" h, S& k5 kDelayMS(2000);
6 ]  Z8 `* T% E7 ^* _) k: KOperation_Type=4;
$ {' T& W& u4 n7 Ebreak;
case 4: //南北向黃燈閃爍 5 次
( l$ P% X# J7 @7 d3 uDelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
* u1 b8 f* f6 j; S! @. d9 Uif(++Flash_Count!=10) return;
" p" Y, E* P6 Z1 vFlash_Count=0;
Operation_Type=1;
}
# u4 u! r2 k9 y6 M, g7 E8 B}
//主程序
9 u, v% K4 S  _9 f* Uvoid main()
/ D' {, Q5 c5 d{
while(1) Traffic_Light();
* A3 S8 A8 @1 S' C0 K}