AVR ATmage16 16位定时器的使用

#include

#include
#define uchar unsigned char
#define uchar  unsigned int
uchar  flag;
void main()
{
      TCCR1A = 0;//WGM11、10清零
      TCCR1B = 0x04; //256分频

      TCNT1H = 0x8f;
      TCNT1L = 0x80;

      tiMSK  = BIT(2);
      SREG = BIT(7);

      DDRA=0xff;
      PORTA=0;
      while(1)PORTA=flag;
}

#pragma interrupt_handler timer1:iv_TIMER1_OVF
void timer1()
{
      TCNT1H = 0x8f;
      TCNT1L = 0x80;
      flag++;
      if(flag == 100)flag=0;
}