SpectraVideo Camera User’s Manual
Software Development
30
outputs. Depending on the CCD output used in a particular camera and the analog
gain state desired, the DSP may have to be rebooted after power-up but before
doing anything else. The PROM pages to be used with a particular camera are
highlighted in bold on the camera data sheet sent with the hardware.
All data commands must be in the range 0 to 16383 due to counter size limitations
in the DSP except as noted. Some values will cause loops to be very long.
Rebooting the camera from the power switch will clear this condition.
The DSP runs off a master clock and all timing is in units of master clock periods,
referred to below as CLK. The actual clock period of a particular camera may be
found on the data sheet and in the registry or pixview.ini shipped with the camera.
11.1.1.
R
EBOOT
C
OMMANDS
Control Character
(ASCII)
Function
Discussion
0 to 7
Prom Page
Reboot
Reboots the DSP from the selected PROM
page. The pages for use with a particular
camera are noted on the camera data
sheet in bold.
11.1.2.
R
EGION OF
I
NTEREST
(ROI)
I
MPLEMENTATION
The SpectraVideo camera supports Region-of-Interest (ROI) readout of the CCD.
Both single ROI and multiple ROIs up to a maximum of 16 are supported. The
ROI parameters are set through the serial port interface. The order in which the
parameters are sent is important, depending on whether no ROI, single ROI or
multiple ROI is desired—this order is elaborated below.
Single ROIs may be anywhere on the CCD, up to the edge of the device. Figure
11 shows the parameter names schematically for single ROI readout.