CAN – Ethernet Gateway
26 © SYS TEC electronic GmbH 2007 L-1032e_9
4.2.2 UDP/TCP Server Interface
The UDP server interface (
udpserv) awaits UDP connection queries
from another Gateway and then creates a new UDP connection, which
is used for the CAN message exchange. Likewise, the TCP server
(
tcpserv) awaits TCP connection queries and then creates a TCP
interface for communication if required.
The UDP/TCP interfaces created in this manner are removed by the
UDP/TCP server when the connection is ended or aborted. In order to
be able to react to TCP- as well as UDP-based queries, a TCP and a
UDP server interface both have to exist on the Gateway.
A UDP server interface is created with the command
mkif udpserv↵
using the next available interface number. The directory name is
chosen automatically and is
/if/udpserv0 for the first interface.
A TCP server interface is created with the command
mkif tcpserv↵
within /if/tcpserv0.
Possible options:
<option> ::= {port:<num>} | {trig:<cnt>[:<time>]}
<num>
contains the port number where the interface awaits
queries (default: 8234)
<trig> ::= trig:<cnt>[:<time>]
These parameters can be used to control the transmission of CAN
messages in TCP/UPD packets. A trigger threshold is set which
enables the transmission of a specific minimum number of CAN
messages in a UDP/TCP packet. To ensure that the packets are
transmitted after a maximum amount of time, even if the
minimum number of CAN messages has not been reached, an
additional timer event can initiate the transmission of the
UDP/TCP packet. These parameters are applicable for
To Next Page
Loading...