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CHDR RFNoC packet header format
BIT Meaning
63:62 Packet type
61 has_time (0 for no, 1 for time field on next line)
60 EOB
59:48 12-bit sequence number (from VRLP frame count, bottom 4 bits should match VRT seq number)
47:32 16-bit length in bytes (from VRT length in words32)
31:0 stream ID
Type EOB Description
00 0 Data
00 1 Data with EOB
01 0 Flow Control
01 1 ACK the End of a Burst (should this also serve for flow control?)
10 0 Command
10 1 Reserved
11 0 Response / ACK to a Command
11 1 ERROR indicator (underflow, overflow, etc.)
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