Ocean Optics Flame-S, User Manual

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8: Firmware and Advanced Communications
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EP2 Command
Byte Value
Description
0x6E Write Irradiance Calibration Factors
0xFE Query Information
USB Command Descriptions
A detailed description of all Flame commands follows. While all commands are sent to EP1 over
the USB port, the byte sequence is command dependent. The general format is the first byte is
the command value and the additional bytes are command specific values.
Byte 0 Byte 1 Byte 2 … Byte n-1
Command
Byte Command
Specific Command
Specific
…
Command
Specific
Initialize Flame
Initializes certain parameters on the Flame and sets internal variables based on the USB
communication speed the device is operating at. This command should be called at the start of
every session however if the user does not call it, it will be executed on the first Request Scan
command. The default vales are set as follows:
Parameter Default Value
Trigger Mode 0
– Normal Trigger
Byte Format
Byte 0
0x01
Set Integration Time
Sets the Flame integration time in microseconds. The value is a 32-bit value whose acceptable
range is 10 – 65,535,000µs. If the value is outside this range the value is unchanged. For
integration times less than 655,000µs, the integration counter has a resolution of 10µs. For
integration times greater than this, the integration counter has a resolution of 1ms.
Byte Format
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4
0x02 LSW-LSB LSW-MSB MSW-LSB MSW-LSB
MSW & LSW: Most/Least Significant Word
MSB & LSB: Most/Least Significant Byte