Interrupts on Due with pinMode OUTPUT, and switching pinMode

[arduino]

Interrupts on Due with pinMode OUTPUT, and switching pinMode

[agdl]

From @3esmit on June 9, 2015 17:43

I've found out that executing pinMode is unattaching interrupts on DUE, maybe digitalWrite does that too.

[agdl]

From @3esmit on June 9, 2015 17:46

I used the following code to test it:

void setup()
{
  Serial.begin(9600);
}
void myFunc() {
  Serial.println(3);
}
void loop() {
  byte command;

  if (Serial.available()) {
    command = Serial.read();
    switch(command) {
    case '1':
      attachInterrupt(18, myFunc, CHANGE);
      Serial.println(1);
      break;
    case '2':
      pinMode(18, INPUT_PULLUP);
      Serial.println(2);
      break;
    }
  }
}

[agdl]

From @techpaul on February 1, 2016 14:52

Came across this issue on my PS2 keyboard libraries using V1.6.7 and Due board manager 1.6.6. My workaround for the library was put an architecture dependent detach and attach interrupt around the direction change for sending to the keyboard see PS2KeyAdvanced, this is then handled correctly and works seamlessly for me. Tested same library now on Uno/Mega/Due recently.

I expect some differences there are others as in AVR char is signed, SAM (Due) it is UNsigned so beware.

[agdl]

From @iotvietmember on August 20, 2016 9:13

Hello
I am using Arduino Due kit. I try to using external interrupt on Due but I met error
Program is crashed at line: attachInterrupt(8, ISR_TX_PIN, CHANGE);
Can you help me?