UART+BLE-based DFU in a single bootlader

RE: UART+BLE-based DFU in a single bootlader

ovrebekk — Fri, 19 Nov 2021 11:57:39 GMT

Hi Stefano

You will find the code attached:

devzone.nordicsemi.com/.../8880.pca10100e_5F00_s112_5F00_ble_5F00_usb_5F00_debug.zip

Best regards
Torbjørn

RE: UART+BLE-based DFU in a single bootlader

ste2108 — Thu, 18 Nov 2021 15:19:01 GMT

Hello Torbjorn, thanks a lot for your reply. I'm using the SDK 15.2.0 (I inherited the project and I don't know why they stuck to an older SDK, but I was told to do so for legacy reason). Ok, I'll wait for your code then!

Regards,

Stefano

RE: UART+BLE-based DFU in a single bootlader

ovrebekk — Thu, 18 Nov 2021 13:44:55 GMT

Hi Stefano

Which version of the SDK are you on?

1) No, it is not quite this simple unfortunately.

2) There is no problem using the UART transport layer for DFU with the S140 present, so no change is needed to the SoftDevice.

3) The SLIP protocol is used for packetization of the UART data, yes. This is handled already on the Nordic side and doesn't have to be added.

Back to 1), it is possible to initialize the bootloader with multiple different transport layers enabled, allowing you to start an update over different transports.

A colleague of mine tried this with USB and BLE apparently, but not with UART and BLE. I will see if I can provide some code based on the work he did, and get back to you.

Best regards
Torbjørn