Developing Custom UART Bootloader for nRF52805

RE: Developing Custom UART Bootloader for nRF52805

Surya Teja — Mon, 03 Apr 2023 10:19:08 GMT

Hi Pawan,

Did you find a way for the implementation of DFU using UART host

RE: Developing Custom UART Bootloader for nRF52805

sureshpawan2010@gmail.com — Tue, 13 Sep 2022 14:02:06 GMT

Hi Tim,

Thanks for reply.

Yes, I need same that can update firmware of nrf52805 by UART interface. Means Host microcontroller have .hex file and it will send packet of hex file to nrf52805 via UART for firmware upgradation.

Could you please share the source code for same.

RE: Developing Custom UART Bootloader for nRF52805

Tim Schuerewegen — Thu, 04 Aug 2022 15:43:19 GMT

I have written a small (< 4KB) serial bootloader that can be used by a microcontroller to read/write nRF52 flash and ram. Is this what you are looking for?

RE: Developing Custom UART Bootloader for nRF52805

tesc — Wed, 30 Mar 2022 13:56:49 GMT

Hi,

You can equip the nRF52805 with the serial DFU bootloader, and then implement the DFU controller for the host microcontroller. See the documentation for the Device Firmware Update process, the DFU protocol in general and the Serial DFU transport in particular.

Regards,
Terje

RE: Developing Custom UART Bootloader for nRF52805

sureshpawan2010@gmail.com — Tue, 29 Mar 2022 10:03:26 GMT

Thanks for replay Terje,

Host microcontroller will be responsible for downgliding Binary file of BLE and will update nRF52805 via UART interface. I want to update only application code of nRF52805 not softdevice and its bootloader.

RE: Developing Custom UART Bootloader for nRF52805

tesc — Mon, 28 Mar 2022 13:08:17 GMT

Hi,

Which way is the DFU going? Do you want to upgrade an nRF based device over UART, or do you want to upgrade a different MCU by receiving an upgrade to the nRF device which then uses a UART based DFU to upgrade that different MCU?

In any case you can start by having a look at the DFU Bootloader modules of the SDK. Depending on what you want to achieve, you will need more or less modification of those modules.

Regards,
Terje