DAP Technology 1394, Руководство по эксплуатации

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Mil1394 Protocol support
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table Mil1394 Channels
Each row in table 'Mil1394 Channels' represents a node. The table shows in the columns the specific
information of a node. This specific information of a node is: its name, the channel number, the heartbeat
and the time slots to transmit an asynchronous stream packet, to receive an asynchronous stream packet
and to transmit a datapump packet.
There are 2 procedures defined to add information of one or more nodes into table 'Mil1394 Channels'.
The first procedure uses button 'New' to add information into the table 'Mil1394 Channels' and the second
procedure uses an import file to load information into the table 'Mil1394 Channels', see as an example
import file Mil1394Definitions.csv.
add information of one or more nodes
manually
Click button 'New' to add a row to table 'Mil1394 Channels' and provide for each column the specific
information.
Import file
Click button 'Import' to open the dialog 'Open' and select the import file (e.g. Mil1394Definitions.csv). The
information included in the import file will be loaded into table 'Mil1394 Channel'.
The extra features of the Mil1394 tab page are described below.
remove information of a node
Click the row in table 'Mil1394 Channel' to select it. This will also enable button 'Remove'. Click button
'Remove' to remove the selected row from table 'Mil1394 Channel'.
margin of the time slots
The margin of the time slots is adjustable via spin box 'Margin'. The margin has effect on the start time
and the end time of a time slot, see figure below.
The default value of margin is 60 microseconds.
extended error checking
Click the check box 'Enable extended check' to enable the check boxes: 'Check heartbeat', 'Check vertical
parity' and 'Check message payload length'.
Click the check box 'Check heartbeat' to enable error checking of the heartbeat value of the nodes, which
support the Mil1394 Protocol. During analysis of a Mil1394 packet the Mil1394 Protocol analyzer will first
check if the heartbeat value of the node, which generated the Mil1394 packet, has increased. The field
'Heartbeat' of the Mil1394 packet contains the heartbeat value of the node. If the heartbeat value has
increased the heartbeat value of the node is valid. If the heartbeat value of the node didn't increased the
Mil1394 Protocol analyzer checks if the frequency by which the heartbeat value increase doesn't fall
below the minimum heartbeat frequency. If this is the case, a heartbeat error occurred.
Click the check box 'Check vertical parity' to enable error checking of the field 'Vertical Parity Check' of
the Mil1394 packets.
Click the check box 'Check message payload length' to enable error checking of the field 'Message
Payload Length' of the Mil1394 packets.
13.3. Scriptor