Test the DDS READ, TAKE, READ_NEXT_SAMPLE, TAKE_NEXT_SAMPLE,
READ_INSTANCE, TAKE_INSTANCE, READ_NEXT_INSTANCE, TAKE_NEXT_INSTANCE
Operations.
Backport fixes to previous testbenches.
Change handling of DISPOSE Samples of unknown Instances.
Amongst other fixes the interface between RTPS-HC/DDS was changed.
The Liveliness Update metatraffic operation was also made QOS dependant
and put behind synthesis guards.
Instance Removal trigger was modified. While before at least 1 instance
slot needed to be empty at all times (similar to the sample slot), thsi
was changed to only remove instances on demand. This is controlled via
a signal that holds the current number of stale (removalble) instances.
Since the payload can only be padded until the next 4-byte aligned
address, we needed a way to read out only the actual payload in case the
payload was not aligned in the last payload slot (did not go until the
end of the payload slot). This is now handled by an additional bit flag
in the Sample Status Info which denotes if the payload is aligned. In
the case the payload is unaligned, the last address of the last payload
slot contains the offset of the actual payload end.
This commit also adds MEMORY RESET states for the Sample, payload, and
instance Memory.
