Rising Edge Interrupt

i'm trying set interrupt act on rising edge coming motion detector activate output period of time. code have far:

code: [select]


//ewagner

//5/7/2002

//

#define led 13
volatile int flag = low;

void setup()
{
pinmode(led, output);
digitalwrite (led, low);
attachinterrupt(0, light, rising);
}


void loop()
{
 if (flag == high);
 {
   digitalwrite (led, high);
   delay(1000);
   digitalwrite (led, low);
   flag = low;
 }
}


void light()
{
 flag = high;
}


i connected interrupt pin ground on board output continually stays on. appreciated.

you have not defined interrupt service routine. there nothing when interrupt.
see:-
http://arduino.cc/it/reference/attachinterrupt

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