problem of nrf52832 softdevice 2.0.0 OTA update

RE: problem of nrf52832 softdevice 2.0.0 OTA update

Einar Thorsrud — Fri, 21 Jun 2019 08:58:33 GMT

Hi,

This post describes how you modify the SDK 11 bootloader so that it will update the UICR and relocate the bootloader, making room for a larger bootloader to be programmed at a later stage. This must be done first, with a separate update before you can upgrade to the SDK 15 bootloader. Then you can subsequently update to the secure bootloader from SDK 15.

RE: problem of nrf52832 softdevice 2.0.0 OTA update

tat — Fri, 21 Jun 2019 07:33:28 GMT

Thanks Einar Thorsrud reply ,whitch bootloader should patch dfu_dual_bank.c? sdk11 or sdk 15.2?

Thanks.

RE: problem of nrf52832 softdevice 2.0.0 OTA update

Einar Thorsrud — Thu, 20 Jun 2019 08:20:00 GMT

Hi,

Upgrading from the legacy (none-secure) bootloader in SDK 11 to the secure bootloader is not supported, as the secure bootloader is larger in size, and therefore needs to start at a lower address. Moreover, you cannot upgrade the SoftDevice version without also upgrading the bootloader, since the bootloader uses the SoftDevice for BLE communication. It is possible to work around this by using a temporary bootloader that rewrites the UICR register as described in this post, but you should be aware that you risk bricking the device if an error or reset occurs at a bad time during this process.