DAP Technology 1394, Operation Manual

Page: 53 / 458

Commander
53 Copyright © DapTechnology B.V., 2005-2019 - All Rights Reserved., 5/20/2019
In the case of broadcasts, only write actions will be possible.
Node
If 'broadcast' is not checked, you can select a node from this popup list. The nodes in this list will consist
of all nodes connected to the bus if the local bus is specified (local checked), otherwise it will be a list of
all possible node Ids (0 to 62).
Offset
To complete the address, you can specify the offset, by putting a decimal or hexadecimal value in the
'Offset' box. If you select an offset from the popup list beneath it, this 'Offset' box will be filled in
automatically. When the offset is changed, the offset values in the data table will change accordingly.
offset popup list
Alternatively, you can select one of the pre-programmed addresses from the popup list below the 'Offset'
box. Selecting one of those addresses will automatically fill in the 'Offset' value and the 'Length' box will
be initialized with a default value. Both the 'Offset' and 'Length' can be changed manually afterwards.
length specification
Length specification consists of the 'quadlets' checkbox and 'Length' box:
quadlets
Depending on the state of this checkbox, the length indicated in the 'Length' box is specified in bytes (not
checked) or quadlets (checked), and the data in the data table will be represented in bytes or quadlets
accordingly.
Length
You can put a decimal or hexadecimal number in the 'Length' box. When the length is changed, the length
of the data displayed in the data table changes accordingly.
The length can be specified in bytes or quadlets, depending on the 'quadlets' checkbox.
data table
The data table displays the data currently in the read/write buffer. The date will be displayed with a red
color if the read, write or lock transaction isn’t performed yet. After a read, write or lock transaction, the
correct read, written or lock-data will be displayed with black color. Depending on the 'quadlets' checkbox
state, it will display the data as bytes or quadlets.
For read and writes, the data table has two columns: the offset and the data. If the 'Lock Oper.' checkbox
is checked however, it contains an additional 'Lock argument' column (like the example above). This is
because some lock operations need both data and arguments. After a correct lock operation, the returned
data in the lock response packet is put in the data column. Note that lock operations can only be
performed on data sizes of 1 or 2 quadlets.
read/write/lock control
The read/write/lock control consists of:
Read
When the 'Read' button is clicked, the specified addresses will be read and the data will be displayed in
the data table. The read is disabled if the address does not specify a valid read address (e.g. a broadcast
address).
If a read could not be performed successfully, a message will display the reason for the failure, and the
data table will be unchanged. All data that could be read successfully will be displayed with black color in
the data table.
Write
When the 'Write' button is clicked, the data specified in the data table will be written to the specified
addresses. The write is disabled if the address does not specify a valid write address.
If a write could not be performed successfully, a message will display the reason for the failure. All data
that could be written successfully will be displayed with black color in the data table.
Lock Oper.
You must check this checkbox to perform a lock operation. When checked, the 'Read' and 'Write' buttons
will be disabled, and the 'Lock' button will be enabled if the address specifies a valid read/write address
(e.g. not a broadcast address).