FastVision FastCamera13 User Manual - page 17
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13. INTERNAL CAMERA MEMORY
The camera contains at least 128 MB of internal memory which can be expanded to 1000 MB,
which can be used to FIFO the input images, to allow burst exposure, and slow readout
operation. Only the image data in the selected ROI is stored. A serial command or the positive
edge of CC3 can be used to clear FIFO memory.
In addition the Camera contains LUTs for conversion from 8 to 10 bit data which can be uploaded
via the serial port.
13.1 Serial
Commands
The following text will discuss the command and control commands to and from the
FastCamera40 via the Serial Interface.
For those commands that have multiple bytes of data associated with them the protocol
would be:
In this example the command was 0x01 for configure DAC’s the 3 bytes of length are
necessary to accommodate being able to program the DATA FPGA via the Serial
Interface. In this instance the length would total 32 bytes. 32 bytes of data would follow.
The receiving machine will not go back to its idle state until 32 bytes of data are
transferred across the serial interface. The following table lists the commands and their
encoding:
13.2 0x00 Serial Command
Use this to reset the serial interface. If you send zero over and over until the camera
sends a ‘?’ (0x3f) you will be back in sync without effecting the camera state.
13.3 0x01 ADC settings Serial Command
If you need to adjust the control voltages of the sensor, then use this command. Note:
FastVision does NOT support using this command, if you change these values from the
factory values, the sensor will not work right and your image quality will be poor. So if you
don’t know what your doing don’t mess with this. If you mess with this, just power off the
camera and power it on again, and you will be out of trouble.
13.4 0x02 and 0x03 ROI Serial Commands
These commands set the start and end line (0x02) and the starting and ending column
0x03) of the sensor, read out and defines the size of the image. If you want the highest
possible frame rate, keep the last column in your ROI less than 2048 (40). This is not an
issue on the FastCamera13.
13.5 0x04 Line Length Serial Command
This sets the number of pixel clocks per line. If you are using the full sensor on the
FastCamera40 this must be greater than or equal to 153, or 132 on the FastCamera13.
Set this to larger values to slow the data rate from the camera or to get finer control of the
exposure.