5-1.c

这是HOLTEK HT 48系列单片机应用实例

unsigned char _pac @0x13;
unsigned char _pa  @0x12;
unsigned char _pbc @0x15;
unsigned char _pb  @0x14;
unsigned char _intc	@0x0b;
#pragma vector timer0 @ 0x4
void delay(){unsigned long int i;for(i=0;i<5000;i++);}
extern void LED()
{
 unsigned int a;
 for(a=0;a<5;a++)
 {
 _pa=0xff;
 delay();
 _pa=0xfe;
 delay();
 }
}
void timer0()
{
 LED();
}
void main()
{
 _intc=0x0f;
 _pac=0x00;
 while(1)
 {
  _pa=0xff;
  delay();
  _pa=0x00;
  delay();
 }
}