External Interrupt @ t2313 doesnt work


I'm trying to get this code working on my t2313:

byte led = 2;
volatile int dly = 500;

void setup() {
  pinMode(led, OUTPUT);
  digitalWrite(6,HIGH);    // pullups
  attachInterrupt(0, less_dly, LOW);
  attachInterrupt(1, more_dly, LOW);

void loop() {
  digitalWrite(led, HIGH);
  digitalWrite(led, LOW);

void less_dly() {
  dly = dly-10;

void more_dly() {
  dly = dly+10;

The t2313 is running at 1Mhz with this core: Google Code Archive - Long-term storage for Google Code Project Hosting. . Its not doing anything at all. Not even the loop() blinking. I'm thankful for any help!

Does the LED blink every 500ms if you comment-out the attachInterrupt calls?

Ok pretty stupid but I mixed the pins up. I was connecting the LED to pin2 (AVR) and not pin2 (Arduino). The pull up command was also wrong and needed to be changed to 4/5.

Now it works fine. Thank you for forcing me to check it again :slight_smile:

Arduino AVR (t2313)
--------- --------------
- 1=RST
0 2=RX
1 3=TX
2 4=IO
3 5=IO
4 6=INT0
5 7=INT1
... ...