Bootloader resets at some point in nRF52820

RE: Bootloader resets at some point in nRF52820

Susheel Nuguru — Fri, 30 Sep 2022 10:38:30 GMT

You should be able to put a breakpoint at all the NVIC_SystemReset occurance in your code and run in debug mode. You will then get the context of getting a soft reset with the function call stack in your debugger to get more context.

RE: Bootloader resets at some point in nRF52820

Louis_263 — Thu, 29 Sep 2022 10:43:35 GMT

Do any of these functions change the value in the GPREGRET register or call an NVIC_SystemReset? Otherwise I can't think of any reason for this... In my application I use a watchdog and then jump to the bootloader when DFU. I had thought that the watchdog might cause a reset, but it is automatically fed in the bootloader code.

RE: Bootloader resets at some point in nRF52820

Susheel Nuguru — Thu, 29 Sep 2022 10:22:05 GMT

That seems very strange especially the rest of the if conditions before the change also evaluate to true.

RE: Bootloader resets at some point in nRF52820

Louis_263 — Tue, 27 Sep 2022 09:54:45 GMT

Update: If I put the if-instruction for the GPREGRET method at the top of the function dfu_enter_check (see picture) it works... very strange