Example for attachInterrupt()

hi!

imo example program attachinterrupt() suboptimal (if not wrong @ all). brushed little bit:

code: [select]

int interruptpin = 2;
int ledpin = 13;
volatile int state = low;

void setup() {
    pinmode(ledpin, output);
    attachinterrupt(digitalpintointerrupt(interruptpin), blink, change);
}

void loop() {
    digitalwrite(ledpin, state);
}

void blink() {
    state = !state;
}


maybe 1 less confusing :-)

gregor

is original example not wrong? came here looking clarification, original code reads:

code: [select]


int pin = 13;
volatile int state = low;

void setup() {
    pinmode(pin, output);
    attachinterrupt(digitalpintointerrupt(pin), blink, change);
}

void loop() {
    digitalwrite(pin, state);
}

void blink() {
    state = !state;
}


it uses same pin, 13, both drive led , attach interrupt. isn't error?

unless i'm mistaken, code correct while original indeed wrong.

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