Ocean Optics Flame-S - Page 81

8: Firmware and Advanced Communications
225-00000-000-11-201604 71
USB High Speed (480Mbps) Packet Format
The data is read from EP2In. The packet format is described below.
Packet #
End Point
# Bytes
Pixels
0
EP2In
512
0-255
1
EP2In
512
256-511
2
EP2In
512
512-767
3
EP2In
512
768-1023
4
EP2In
512
1024-1279
5
EP2In
512
1280-1535
…
EP2In
512
7
EP2In
512
1792–2048
8
EP2In
1
Sync Packet
The format for the first packet is as follows (all other packets except the synch packet
has a similar format except the pixel numbers are incremented by 256 pixels for each
packet).
Packet 0
Byte 0
Byte 1
Byte 2
Byte 3
Pixel 0 LSB
Pixel 0 MSB
Pixel 1 LSB
Pixel 1 MSB
…
Byte 510
Byte 511
Pixel 255 LSB
Pixel 255 MSB
Packet 15 – Synchronization Packet (1 byte)
Byte 0
0x69