Arduino Due watchdog support 1.6.5

[kaddigat]

Watchdog does not work for arduino using IDE 1.6.5. However, according to the realease notes of 1.6.5 watchdog should already be implemented.

https://www.arduino.cc/en/Main/ReleaseNotes

[facchinm]

Hi @kaddigat , what version of SAM core is reported in Board Manager?
Starting from IDE 1.6.2 non-AVR boards are handled externally so maybe you have an older version of the core while the IDE is updated.

The watchdog has been added in this commit #3111

[kaddigat]

SAM core version is 1.6.4. But an update to 1.6.5 is not available. Is there a possibility to perform the update manually?

[facchinm]

At the moment the only way to apply an almost master SAM core without manually patching the files is following these instructions (#3524 (comment)) while using a nightly version of the IDE.

I'm really sorry for the inconvenience and I'll push for a fast release of the updated core.

[kaddigat]

I tried to get the watchdog running with Arduino IDE 1.6.6 Hourly Build 2015/09/28 06:26. I put the latest SAM core (downloaded from https://mega.nz/#!R5JzSaYb!oRss5QcoL1Jv6pvULNzdcNulSQrmnDhtPKPo2F4qve4) into the sketchbook and chose the Arduino Due board from 'ARM boards PR 3524'. Everything seems to work fine. Then tested the watchdog with this basic sketch:

int counter = 0;

void setup() 
{
  watchdogEnable(1000);
  Serial.begin(9600);
}

void loop() 
{
  delay(500);
  Serial.println(counter);
  if(counter >= 10)
  { 
    while(true)
    {
      Serial.println("loop");
      delay(100);
    }
  }
  counter++;
}

The compiler does not complain, but the Arduino does NOT restart und stays in the loop :(

[facchinm]

Testing right now, I'll report the results here as soon as I can

[facchinm]

Ok, found, there is a hole in the documentation about watchdog usage on DUE.
So, you need to define a non weak function

watchdogSetup(void) {
// do what you want here
}

in your sketch to get things working right.
Sorry for the inconvenience, I'll immediately start writing some docs about that!

[kaddigat]

Thanks for the quick help! Everything is working fine now.
I described the solution in this post:
http://forum.arduino.cc/index.php?topic=350058.msg2416416#msg2416416

[facchinm]

Glad it solved your issue!
IDE 1.6.6 is on its way with a lot of new features and it will bring the updated cores so stay tuned 😉

[q2dg]

Is there any chance to generalize this API to other boards (328-based, 2560-based, 32U4-based, Zero...) in order to homegenize this feature?
Thanks