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CC8531: How to use side-channel thru EHIF interface

Part Number: CC8531


I would like to use the side-channel thru EHIF, but I don't get any examples or hints in TI documents and web pages.

The master role is done in a USB dongle which is connected to the PC and the slaves are in the stereo headphone.

My first question is how to find the device ID of 32bits, which is required in the EHIF commands like DSC_TX_DATAGRAM or DSC_RX_DATAGRAM.

On the slave side, is there any way to find the device ID of the other slave or the master?