Error: Config Error: Failed to update IO firmware ,

[ling_huang]

Config Error: Failed to update IO firmware …
firstly put the IOMCU bootloader on the IOMCU usinga stlink.After that ,we load a normal firmware on the main cube.and then error for that

Config Error: Baro: unable to initialise driver …
After restarting, this problem（Config Error: Failed to update IO firmware） occurred again。

fmu(stm32h743) iomcu(stm32h103)
Thanks in advance for your help!

[ling_huang]

fmu uart6 and iomcu uart2 communication has waveform。meaning IOMCU have reply to FMU.