led.c

PIC18系列单片机的LED,LCD驱动程序实例。

#include <pic.h>


#define uchar unsigned char
#define uint unsigned int
__CONFIG(0x3f3a);
void delay(uint m)
{
	uint i,j;
	for(i=0;i<m;i++)
	{
		for(j=0;j<100;j++);
	}

}
void main(void)
{
	TRISB=0xf0;
	while(1)
	{
/*		if(!RB4)
		RB0=0;
		else RB0=1;
		if(!RB5)
		RB1=0;
		else RB1=1;
		if(!RB6)
		RB2=0;
		else RB2=1;
		if(!RB7)
		RB3=0;
		else RB3=1;
*/
		PORTB=0xff;
		delay(1000);
		PORTB=0xf0;
		delay(1000);
		
	}

}