Ocean Optics Flame-S - Page 82

8: Firmware and Advanced Communications
72 225-00000-000-11-201604
USB Full Speed (12Mbps) Packet Format
In this mode all data is read from EP2In. The pixel and packet format is shown below.
Packet #
End Point
# Bytes
Pixels
0
EP2In
64
0-31
1
EP2In
64
32-63
2
EP2In
64
64-95
…
EP2In
64
63
EP2In
64
2016-2047
64
EP2In
1
Sync Packet
Packet 0
Byte 0
Byte 1
Byte 2
Byte 3
Pixel 0 LSB
Pixel 0 MSB
Pixel 1 LSB
Pixel 2 MSB
…
Byte 62
Byte 63
Pixel 31 LSB
Pixel 31 MSB
Packet 64 – Synchronization Packet (1 byte)
Byte 0
0x69
Autonulling
Slot 0x11 (17) contains autonulling information that has a scaling term used to adjust the
magnitude of the entire spectrum. This can be read out by sending bytes 0x05 11 to the low-
speed out endpoint (0x01) and then reading out 17 bytes from the low-speed in endpoint
(0x81). The bytes of use are Byte offset 6 and 7. The 17 bytes will be formatted as follows:
0x05 11 XX XX XX XX SS SS XX XX XX XX XX XX XX XX XX