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Mil1394 Protocol support
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13.3.1. Timed Sending
This example shows some of the timed sending capabilities of the Scriptor. Each frame, two packets are
sent. One is a STOF packet that is transmitted at frame offset time 0 and the other packet is a data
packet using the Mil1394 Protocol. By using a slider on the Control Panel, the frame offset of the second
packet can be controlled.
The next section describes how to run the example and how to use the recorder to verify that the packet's
offset actually changes when moving the slider.
13.3.1.1. How to use it
Control Panel contents
After loading the file "timedSend.fss" and clicking on the Control Panel tab, a Control Panel will be shown
as in the picture below. The Control Panel contains the following controls:
Packet ID
This control displays the ID of the current packet. The ID of a packet is also written to the packet before it
is sent. This way, it is possible to find a packet in the recorder that corresponds to a packet that is selected
on the Control Panel.
Frame Offset
This control displays the offset of the current packet in the current frame. The frame length is set to its
default value of 12.5 ms, and therefore, this offset should have a value between 0 and 12.5 ms. The
Frame Offset control also contains an alarm that is triggered if the value exceeds the frame length. This is
also shown in the history graph at the bottom as a dotted line.
Generate Data CRC Errors
This button can be toggled to enable/disable the CRC error on that Mil1394 packet with the user controlled
frame offset. This feature makes it easier to distinguish the STOF packets from the Mil1394 data packets
in the recorder. (the ones with a CRC error will be displayed in red)
Frame Offset
This slider controls the frame offset of the Mil1394 data packet. By sliding the slider bar along its
horizontal axis, it is possible to set the frame offset to a value between 0 and 15ms. As the frame length is
only 12.5 ms, setting the offset to a value greater than 12.5 will prefend the packets from being sent.
When this happens, the "Frame Offset" control will start blinking.
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