OpenVizsla protocol description

Captured data packet format

0        1        2        3        4        5        6        7        8
 01234567 01234567 01234567 01234567 01234567 01234567 01234567 01234567 
+--------+-----------------+-----------------+--------------------------+-------~
|  0xA0  |      Flags      |       Size      |         Timestamp        |  Data 
+--------+-----------------+-----------------+--------------------------+-------~

• 0xA0 --- magic header
• Flags --- 16-bit LSB-first bitset
  • 0x01 --- Physical layer error
  • 0x02 --- RX path overflow
  • 0x04 --- Clipped by filter
  • 0x08 --- Clipped due to packet length (>800 bytes)
  • 0x10 --- Capture hardware was enabled
  • 0x20 --- Capture hardware was disabled
• Size --- 16-bit LSB-first length of the data (Zero size is allowed)
• Timestamp --- 24-bit LSB-first timestamp of the capture in units of FPGA cycles. FPGA is running at 60MHz wrapping the field every 0.27 second
• Data --- https://www.beyondlogic.org/usbnutshell/usb3.shtml