本程式來自《微控制器C語言程式設計實訓100例——基於8051+Proteus模擬》沒用中斷。

#include

#include

#define uchar unsigned char

#define uint unsigned int

void main()

{

uchar T_Count = 0;

P0 = 0xfe;

P2 = 0xfe;

TMOD = 0x10;//定時器1方式1

TH1 = (65535-50000)/256;//定時50000us=50ms

TL1 = (65535-50000)%256;

TR1 = 1;//啟動定時器1

while(1)

{

if(TF1== 1)//查詢方式定時時間到後TF1=1

{

TF1 = 0;

TH1 = (65535-50000)/256;

TL1 = (65535-50000)%256;

if(++T_Count == 20)//50ms*20=1000ms

{

P0 = _crol_(P0,1);

P2 = _crol_(P2,1);

T_Count = 0;

}

}

}

}