Hello,
I have a nordic nrf52840 on board, with another MCU (Cortex-M4) on board. Both chips are connected over UART.
I want to use the Cortex chip to perform firmware update of the Nordic chip over UART. What is the best approach to do this? DFU, write my own bootloader?
In case of DFU? Is there a source code or example library that I would have to implement on the Cortex side to be "DFU master" and send the FW in the proper format to Nordic? I know that for PC there is a utility that does this, is there a source code of the protocol that I could use?
Thank you,
