DAP Technology 1394, Руководство по эксплуатации

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Generator
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10.2.3. Mil1394 Example
We will explain the Generator and Recorder function with regard to the Mil1394-protocol using an
example file.
To run the examples, connect the FireSpy800 and make sure the Mil1394-protocol key is installed.
Load example file
Open the Generator window and select File->Open. Browse to the Mil1394GenExample.fgs file in the
examples folder and open it.
In the Generator window you see at the left a graphical impression of what the Generator will generate.
Each colored block specifies a sequence of stream packets for the corresponding time slot.
When clicking on such a sequence, it will be selected and the upper part of the window shows the
properties of this sequence. You can see for instance the start frame and number of frames to be
generated.
In the example, 1000 STOF packets will be generated. On channel 4 and 5 1000 packets will be
generated with an offset of 2000 and 3000 usec form the STOF packet recpectively. On channel 22 a
sequence of 370 packets, followed by a pause and then 460 packets will be generated with an offset of
8000 uSec from the STOF packet.
Edit packets
When a sequence is selected you will be able to choose if the packet data comes from a file or from a
template packet. In this example, it comes from a template packet.
When the 'Edit template' checkbox is checked, the packet shown is the template packet. This packet can
be changed. When the checkbox is not checed, individual packets of the selected sequence can be
editted. Using the 'Frame' box you can select the packet to be editted. The changed values will be colored
red and they overrule the values from the template packet.
When packet data comes from a file, there is no template packet, but individual packets can still be
editted, overruling the values from the file.
Heartbeat
For a selected sequence you can select the 'Auto heartbeat' option. When selected, the heartbeat value
will increment for each frame. Note that these values are not shown in the packets.
Vertical parity check
For a selected sequence you can select the 'Auto vertical parity check' (VPC) option. When selected, the
VPC value will be calculated for each packet in that sequence. Note that these values are not shown in
the packets.
Start/stop generate
Before the Generator can be started, you first need to upload the information. Then the Generator can be
started and stopped. The buttons to do this can be found in the upper left corner of the window. When the
example is started, the 1000 STOF packets will be generated on channel 31 and at the same time the
1000 packets on channels 4 and 5 and the 370 plus 460 packets on channel 22 will be generated
inbetween the STOF packets with the specified offsets. In total 1000 frames will be generated and the
Generator will stop after that (it takes 12.5 sec). If one or more channels are in loop-mode, the Generator
continues generating until stopped by the user.
Recorder example
An recording of the result of this generated example has been saved into Mil1394RecExample1.fsr. For
more information about the recorder, please see the manual.