PIC16F877A例程--LED

#include

__CONFIG(0x3F32); //芯片配置字

typedef unsigned char uchar;

typedef unsigned int uint;

void delay(uint z);

void main (void)

{

uchar temp;

TRISA=0XC0; //RA0-RA5設(shè)為輸出驅(qū)動(dòng)六個(gè)LED

for(;;)

for(temp=0xfe;temp!=0x80;temp<<=1)

{

PORTA=temp;

delay(1000);

}

}

void delay(uint z )

{

uint x,y;

for(x=z;x--;x>0)

for(y=40;y--;y>0);

}