Using Control And Status Registers - Point Grey Flea3 GigE Technical Reference

Point Grey Flea3 GigE Technical Reference
3.4

Using Control and Status Registers

The user can monitor or control each feature of the camera through the control and status registers (CSRs) programmed
into the camera firmware. These registers conform to the IIDC v1.32 standard (except where noted). Format tables for
each 32-bit register are presented to describe the purpose of each bit that comprises the register. Bit 0 is always the
most significant bit of the register value.
Register offsets and values are generally referred to in their hexadecimal forms, represented by either a '0x' before the
number or 'h' after the number, e.g. the decimal number 255 can be represented as 0xFF or FFh.
Detailed information on CSRs is provided in
A complete list of CSRs can be found in the Point Grey Digital Camera Register Reference available from the
Downloads page.
The controllable fields of most registers are Mode and Value.
Modes
Each CSR has three bits for mode control, ON_ OFF, One_Push and A_M_Mode (Auto/Manual mode). Each feature can
have four states corresponding to the combination of mode control bits.
One_Push
N/A
N/A
0
1
(Self clear)
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.
Revised 10/29/2013
Copyright ©2010-2013 Point Grey Research Inc.
Control and Status
Not all features implement all modes.
Table 3.1: CSR Mode Control Descriptions
ON_OFF A_M_Mode
0 N/A
1 1
1 0
1 0
Registers.
Off state.
Feature will be fixed value state and uncontrollable.
Auto control state.
Camera controls feature by itself continuously.
Manual control state.
User can control feature by writing value to the value field.
One-Push action.
Camera controls feature by itself only once and returns to the Manual
control state with adjusted value.
3 Tools to Control the Flea3 GigE
State
18