[Sdcc-user] Problem Interrupt Service Routine

[<Gil...@rt...>]

Hi all,

I am having trouble from the following interrupt routine=2E  The code=20=
inside the if statement is behaving erratically=2E  Sometime the code=20=
inside the if statement is always executed no matter what=2E

volatile unsigned char alarm_set_flag =3D 0;  //flag if alarm engaged


void timer0_isr(void) interrupt 1 using 1
{
 timers();
}

#pragma SAVE
#pragma NOOVERLAY
void timers() critical
{=20=
 TL0 =3D (TIMER0COUNT & 0x00FF); //timer reload value
 TH0 =3D (TIMER0COUNT >> 8);

if(alarm_set_flag)    //if alarm is engaged
 {=20=
  code=2E=2E=2E=2E=2E=2E
 }
}
#pragma RESTORE