SB and SFU isolated?

[Vmere.1]

Hey guys,

I want to perform a firmware upgrade over the air. And use a UART to connect to IoT device.

I use stm32l431xx and it contains hardware for symmetric encryption. And the host device which sends the binary uses stm32l496 has SBSFU.

So I have a constraint now, I don't want to make many changes to the bootloader apart from boot entry points logic. I want to use only the SFU package in SBSFU. Is this possible?

Regards,

Vmere.

[Jocelyn RICARD]

Hello @Vmere.1​ 

I'm sorry I don't fully catch your setup.

Could you please provide more details. Is this one device with 2 MCUs ?

The "host" is connected to a server ?

The stm32l431 is a second MCU in the device connected by uart to the stm32l496 ?

Thank you

Best regards

Jocelyn