Point Grey Flea3 USB 3.0 Technical Reference 3 General Camera Operation
1. Read the current state of the IMAGE_RETRANSMITregister 634h:
Read 634h 00 07 00 00
Reading register 634h indicates that the frame buffer mechanism is currently disabled, and in the current imaging
mode, the system is capable of storing up to 7 images.
2. Enable image hold:
Write 634h 80 07 00 00
Setting bit 0 of register 634h to 1 enables images to accumulate in the frame buffer.
3. Enable buffered image transfer:
Write 634h C0 07 00 00
Setting bit 1 of register 634h to 1 enables transfer of buffered image data.
4. Retransmit the last image:
Write 61Ch 80 00 00 00
Setting bit 0 of register 61Ch to 1 causes the last image to be retransmitted.
5. Disable buffered image transfer:
Write 634h 00 07 00 00
Writing 0 to bits 0 and 1 of register 634h disables buffered image hold and transfer, and returns the camera to normal
operation.
3.4.3 Example: Storing Images for Later Transmission Using Registers
Again, assuming the camera is configured to run in an external trigger mode:
1. Read the current state of register 634h:
Read 634h 00 07 00 00
Again, this value indicates that the frame buffer mechanism is currently disabled, and in the current imaging mode the
system is capable of storing up to 7 images.
2. Enable hold image mode and buffer data transfer:
Write 634h C0 07 00 00
Setting bits 0 and 1 of register 634h enables image buffer hold and transfer, resulting in images being accumulated in
the frame buffer for later transmission.
3. Acquire 4 images:
Write 62Ch 80 00 00 00
Write 62Ch 80 00 00 00
Write 62Ch 80 00 00 00
Write 62Ch 80 00 00 00
Read 634h C0 07 00 04
Writing to software trigger register 62Ch 4 times causes 4 images to accumulate in the frame buffer. The last 12 bits
of register 634h will now indicate that there are 4 images in the frame buffer.
Revised 9/27/2012
Copyright ©2011-2012 Point Grey Research Inc.
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