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Developing Custom UART Bootloader for nRF52805

Hi All,

I am using s112_nrf52_7.2.0_softdevice with nRF5_SDK_17.1.0 and Segger Embedded studio for nRF52805. My application code is successfully patched for nRF52805 as provided in link and working fine.

My application code uses 150 kb Flash(Out 192 kb). I want to develop a custom Bootloader for nRF52805 so that Host Microcontroller can update its firmware using UART(Rx ,Tx Pin) interface.

Kindly provide helpful links ,test projects or documentation so that i will clear where to start with for the same and also guide me through necessary setting to be done for developing custom bootloader.

Thanks

0 user8164 over 4 years ago

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
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0 user93347 over 4 years ago

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.
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0 user8164 over 4 years ago in reply to user93347

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
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