Virtual Serial Port - Dalsa QuickCam User Manual

QuickCam User's Manual
Packet Size
Calculate Timeouts
Restore Default

Virtual Serial Port

Use Configure Serial Port Link Enable/Disable to enable or disable the
virtual serial port.
Some camera control tools can connect only to a Windows system serial port. To
avoid asking for changes from camera manufacturers, two serial COM ports in
the PC can be linked together to share the serial channel to the IP engine.
Through their linkage, data written to one port can be read by the other port, and
vice-versa.
These linked serial COM ports can be either "virtual" or physical. To set up
virtual ports, use a virtual serial port driver. Some good virtual serial port
drivers are available at:
serial-port.com/.
Alternatively, if a PC has two free physical serial ports, they can be connected
together and used as a pair, in the same manner as a virtual serial port driver.
The Serial Port Configuration dialog box allows you to attach the serial channel
in QuickCam to one port in a serial port pair, whether a physical pair or virtual
pair. Therefore, an external application needs simply to connect to the other
serial port of the pair to communicate with the camera.
Note that while the virtual serial port is enabled, not all GUI controls will be
available. This is because the camera expects to take commands through the
virtual serial interface instead of the GUI. To regain use of all GUI controls,
disable the virtual serial port.
03-032-10187-04
Indicates the maximum packet size, in bytes, that the
camera can use to send image data to the application.
When connected point-to-point with the QuickCam
High Performance Driver, the maximum value is 8128
bytes. In networked applications, the value depends on
the maximum packet size that can be accepted by the
switches between the camera and the host PC. If the
switches can be configured to support jumbo packets, it
is recommended to use the jumbo packet configuration
to reduce packet overhead in the application. A packet
size of 1440 bytes will work with all networking
equipment.
Invokes the Timeout Calculator dialog box, which
provides estimates of timeouts to use, based on image
size, link type, the maximum total request time, and
packet size.
Restores default values from factory configuration.
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