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Failed to initialize ADAU1452 using an external MCU

Category: Software
Product Number: ADAU1452


    I use the Signmastudio Dev.Tool creat a router, and export System Files, And then initialize the DSP by an external MCU via IIC with using headers generated by sigma studio, but it doesn't work. But using USBi load the same data to this board's DSP with the USBi, it doew work. That's what I'm confused about.

How can I investigate the cause?