Dear all,

In our cursbom board, managed by a DM3730 module, we attach an expansion module for data capturing. The module is connected to the board throw the USB OTG interface. The power of the expansion module is managed by the DM3730 module using a GPIO.

Usually, when the main application of the device (running on DM37x module) is running, we can power off the expansion module using a text application. The main application should reset the expansion board powers up the expansion module again and the main application can continue with the cada acquision process. However, sometimes, when the main application powers up the expantion module, linux doesn't detect the expantion module and the main application couldn't continue.

Have you detected a similar behaviour in the OTG bus? Could you provide any suggestion to fix the problem?

Thanks and Best Regards,
Joaquim Duran