Point Grey Flea3 FL3-U3 - Values; Using the Inquiry Registers; Using the Absolute Value Registers; Table 2.1: CSR Mode Control Descriptions

Point Grey Flea3 USB 3.0 Technical Reference 2 Getting Started with Flea3 USB 3.0
Not all features implement all modes.
Table 2.1: CSRMode Control Descriptions
One_Push ON_OFF A_M_Mode State
N/A 0 N/A
Off state.
Feature will be fixed value state and uncontrollable.
N/A 1 1
Auto control state.
Camera controls feature by itself continuously.
0 1 0
Manual control state.
User can control feature by writing value to the value field.
1
(Self clear)
1 0
One-Push action.
Camera controls feature by itself only once and returns to the Manual
control state with adjusted value.
2.4.2.2 Values
If the Presence_Inq bit of the register is one, the value field is valid and can be used for controlling the feature. The
user can write control values to the value field only in the Manual control state. In the other states, the user can only
read the value. The camera always has to show the real setting value at the value field if Presence_Inq is one.
2.4.2.3 Using the Inquiry Registers
The camera provides a series of inquiry registers, which allow you to reference basic information about camera
features. For information about the following inquiry registers, see:
n Inquiry Registers for Basic Functions and Feature Presence (page 133): To determine if a particular function or
feature is available on the camera.
n Inquiry Registers for Feature Elements (page 136): To determine if elements of a particular feature are
available on the camera.
n Video Format, Mode and Frame Rate Inquiry Registers (page 138): To determine which standard video format,
modes and frame rates are available on the camera.
The following additional inquiry registers are also available:
n Inquiry Registers for Custom Video Modes (page 144)
n Inquiry Registers for Strobe Output (page 47)
n Inquiry Registers for Serial I/O (page 55)
n Inquiry Registers for Lookup Table Functionality (page 106)
2.4.2.4 Using the Absolute Value Registers
Many Point Grey cameras implement “absolute” modes for various camera settings that report real-world values,
such as shutter time in seconds (s) and gain value in decibels (dB). Using these absolute values is easier and more
efficient than applying complex conversion formulas to the information in the Value field of the associated Control
and Status Register. A relative value does not always translate to the same absolute value. Two properties that can
affect this relationship are pixel clock frequency and horizontal line frequency. These properties are, in turn, affected
Revised 9/27/2012
Copyright ©2011-2012 Point Grey Research Inc.
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