DFU problem with SDK 14.2

RE: DFU problem with SDK 14.2

bjorn-spockeli — Tue, 28 May 2019 07:37:14 GMT

If you want a value to be retained trough a reset, then you should not place it in RAM.

We have two General Purpose retention registers(GPREGRET) on the nRF52832, which are retained through resets due to CPU lockup, SoftReset and wake up from System OFF, see Retained registers in the nRF52832 Product Specification. Note: The GPREGRET registers are 8-bit registers.

If the value needs to be retained through Power on resets, Brownout rests etc, then you should place the value at the end of flash.

RE: DFU problem with SDK 14.2

tianbing357 — Mon, 27 May 2019 15:08:47 GMT

thanks for your help, i find the error. i use __attribute__((section(".ARM.__at_0x20002200"))) , but in the options, i set the ram range is:.the reason i do that is want to retain the value after a reset, is there a better way?

RE: DFU problem with SDK 14.2

bjorn-spockeli — Mon, 27 May 2019 11:33:58 GMT

Can you try to download nrfutil version v3.5.1 using this link

https://github.com/NordicSemiconductor/pc-nrfutil/releases/tag/v3.5.1

and then try to generate the settings page using the same command, i.e.

nrfutil settings generate --family NRF52 --application app.hex --application-version 1 --bootloader-version 2 --bl-settings-version 1 settings.hex

Best regards

Bjørn