trying to use one inturrupt to catch 27 pins

hi,
i have 27 reed switches, can not triggered simultaneously.
mybe use snippet use interrupt catch/rule them all.
and if so, pull-up resistor scheme work configuration.

code: [select]


//trying use 1 inturrupt catch 5 pins
// connecting 5 reed switches same interrupt and
// connecting them indevidually digital pins.


volatile int state = low;
volatile int whichone[]={0,0,0,0,0,0};

void setup()
{
 attachinterrupt(0, blink, rising);
 //init pullup resistor
 for(int i=8;i<=12;i++){
   pinmode(i,input);
   digitalwrite(i,high);
 }
}

void loop()
{
}

void blink()
{
 for(int i=8;i<=12;i++){
   whichone[i]=digitalread(i);
 }
}


well wiring isn't correct yet. way have now, if switch turns on create short circuit +5 vdc ground. pins 8 12 directly wired ground, how can go high ever?


lefty

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