ใบงานที่ 1

#include  (pic.h>
#define _XTAL_FREQ 20000000
__CONFIG(HS&WDTDIS&LVPDIS);

//====================================
void delay_ms(unsigned int tick)
{
while(tick--)
{
__delay_ms(1);
}
}

//==================== MAIN PROGRAM ======================
void main()
{
TRISC=0x00;
PORTC=00;
while(1)
{
PORTC=~PORTC;
delay_ms(500);
}
}