Download firmware over I2C for another MCU

[Switchfeet]

Hello,

I have a custom board which has NRF52832 SOC(i.e. main MCU) and another ARM Core-M0-based MCU(i.e. target MCU). These two are connected over I2C. I wonder how to download firmware of target MCU from NRF52832 SOC to this target MCU over I2C?

I know we can flash SoftDevice, Bootloader, and Application to NRF52832 by using nRFgo Studio, but what about firmware for target MCU? How do I attach the target MCU's firmware(*.HEX) to the HEX files mentioned above and then doing the target MCU firmware downloading between main MCU and target MCU over I2C?

Im using Nordicsemi nRF5 SDK v11.0.0.

I'm very new to this area and hence your suggestions and experience in this regard will be very helpful.

Many thanks in advance.

[Roger Clark]

Just to clarify.

You are asking how you program some other ARM Core M0 process? (Not how to program the nRF52 ?)

If you are asking what I think you are asking, then you effectively need a I2C bootloader for your target MCU (ARM Cortex M0). (Plus some way to trigger your other MCU to execute the I2C bootloader code)