Shared Data Descriptors

In addition to the standard data descriptor sets, the MIP data protocol also has a set of Shared Data (0xFF) descriptors that are common across all data descriptor sets. The shared data descriptors start at 0xD0 and increment from there. These data quantities can be streamed or polled with any data descriptor set.

The shared descriptor set of 0xFF is not valid when configuring data streams. It is used as a placeholder to mean that the shared data descriptors can be used in any data descriptor set.

For example, to output the shared descriptor GPS Timestamp (0xFF,0xD3) in every sensor data packet (data descriptor set = 0x80), one would simply add the 0xD3 descriptor to the list of requested data descriptors in the Descriptors parameter when configuring the sensor data stream using Message Format (0x0C,0x0F).

The shared data descriptors are also carried over in continuation packets, as described in MIP Continuation Packets.