RE: Network Core access to XIP

Simon — Mon, 03 Jan 2022 21:05:17 GMT

Hello,

Sorry for the late reply. A huge part of the suppor team has been on vacation the last days, and that is the reason.

I'll look into your questions the upcoming days.

Best regards,

Simon

RE: Network Core access to XIP

mnmoran — Wed, 29 Dec 2021 23:27:15 GMT

The nRF5340 Product Specification, Figure 27: Memory layout seems to indicate that the XIP space is not accessible by the Network Core.

By modifying the MCUBoot loader.c file to copy the (potentially large) image from XIP space into RAM and using a pointer to that RAM in the PCD transaction to update the Network Core, the BLE upgrade succeeded without crashing.

This change is a very ugly hack on top of the modifications to the loader.c file supplied by the https://github.com/aiminhua/ncs_samples/tree/master/smp_dfu/ble_extFlash example in the sdk_change directory.