Ocean Optics Flame-S, User Manual

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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