Buttonless DFU Timeout

RE: Buttonless DFU Timeout

bjorn-spockeli — Fri, 17 Feb 2017 09:36:55 GMT

Hi Parco,

You can implement this using the Watchdog timer, as suggested by @(wtbn) wojtek. I have implemented this in this answer.

You can also use the RTC (similar to using the Application Timer) as shown in this answer.

Best regards

Bjørn

RE: Buttonless DFU Timeout

Roger Clark — Fri, 17 Feb 2017 00:35:57 GMT

Sounds like a good solution to me

I would have thought that for most scenarios having a timeout on DFU would be a good idea

The bootloader could check if the application memory area is blank, if non - blank it could jump to the application when the timer expired.

Otherwise this sounds like a potential DOS attack, as devices could be sent to DFU and are then out of action.

RE: Buttonless DFU Timeout

Wojtek — Thu, 16 Feb 2017 15:11:04 GMT

What I do in my modified bootloader is automatic jump (using app_timer) to application if no data packets are received in some defined time. Also, I am using hardware watchdog kicked periodically during connection.