how to uninstall watch dog in NCS2.0.2?

[yoyou]

Hello,

NCS2.0.2, nRF5340, VScode, watchdog

i want to uninstall watch dog before  sys_reboot(0)  for DFU;

but as follow no use. it will Restart twice.

void gog()

{

    feed_dog();

    wdt_disable(wdt);

   sys_reboot(0);

}

how to uninstall watch dog?

       

Best regards

[Sigurd Hellesvik]

Hi,

Can you check which value wdt_disable() returns?

Regards,
Sigurd Hellesvik

[yoyou]

Hi,  Sigurd Hellesvik

wdt_disable return value: -1

Best regards

[Sigurd Hellesvik]

Hi,

-1 is EPERM.

From wdt_disable():
"-EPERM – If watchdog can not be disabled directly by application code. "

Maybe an easier way to achieve what you need is to save a Non-Volatile variable keeping track of the watchdog status.
Then enable the watchdog if the variables says so.

Did that make sense?

Regards,
Sigurd Hellesvik

[yoyou]

Hi

i've no idea.

Best regards

[Sigurd Hellesvik]

Hi,

You can not call wdt_disable from you application.

I suggest you do something like this in your code instead:

#define WDT_TMP_DISABLE_ID 1

int wdt_tmp_disabled[1];
nvs_read(fs,WDT_TMP_DISABLE_ID,wdt_tmp_disabled,sizeof(wdt_tmp_disabled));
if(wdt_tmp_disabled){
    wdt_tmp_disabled = 0;
    nvs_write(fs,WDT_TMP_DISABLE_ID,wdt_tmp_disabled,sizeof(wdt_tmp_disabled));
}
else{
    wdt_install_timeout(...)
    wdt_setup(...)
}
// ...
// ...

//If you want to restart temporary withour watchdog:
wdt_tmp_disabled = 1
nvs_write(fs,WDT_TMP_DISABLE_ID,wdt_tmp_disabled,sizeof(wdt_tmp_disabled));
sys_reboot(0)

Did the code example help your understanding?

Regards,
Sigurd Hellesvik

[yoyou]

Hi, Sigurd Hellesvik

thanks for reply, i konw your means.

go to sleep mode, dog will disable auto.

but when i will go to DFU,

dog will restart 3sec later, 

however, i need restart now by call sys_reboot(0),

so it will restart twice.

maybe i can't call sys_reboot(0), only wait dog restart....

     

Best regards

[Sigurd Hellesvik]

Hi Yo,

yoyou said:

maybe i can't call sys_reboot(0), only wait dog restart....

Try this.

Does it fix the problem?

Regards,
Sigurd Hellesvik

[yoyou]

Hi

yes,fix the problem by wait dog restart,

but take time, Not timely enough.

Best regards

[Sigurd Hellesvik]

Hi Yo,

How do you do the DFU?
Serial or Bluetooth Low Energy?

Regards,
Sigurd Hellesvik

[yoyou]

Hi

Serial or Bluetooth Low Energy?

Bluetooth  for DFU.

   

Best regards