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<concept xml:lang="en" id="GUID-08CCCF43-A742-547B-A0E0-F5F6176DABCE"><title>Configuring and Customising the Serial Port</title><shortdesc>Serial ports can be configured in the following ways using the C32 Serial Server environment: </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody><ul><li id="GUID-0467AD16-C175-5657-9D8B-89336E405589"><p>Provide a specialised plug-in to the C32 Serial Server which defines how the port can be accessed and behaves. The plug-ins to the C32 Serial Server are known as CSYs (Comms SYstem plug-ins) and they allow configuration of aspects such as: </p> <ul><li id="GUID-14ECCE86-0628-5B10-AA8C-5CF661594A02"><p>the prefix name for the ports. For example, the ECUART CSY ports have the prefix "COMM" while the USB ports have the prefix ECACM" </p> </li> <li id="GUID-BDF2458A-7C43-5E77-8E1D-A7E96B910B94"><p>the actual port numbers the CSY services. For example, by default the ECUART CSY shipped with Symbian OS will accept connections only on ports 0 and 1 ("COMM::0" and "COMM::1") </p> </li> <li id="GUID-81E9969B-D5FE-53D1-AAE7-5F74408B2CC7"><p>the security requirements that a client must meet to access the ports, such as a minimum set of capabilities or a specific process ID, or list of allowed Vendor IDs and Secure IDs. </p> </li> <li id="GUID-0640D1F6-7E47-5FD7-8607-FC73B61AFD6C"><p>the priority of this CSY when it is running in the same thread as other CSYs. This is defined by the priority of the active objects within the CSY </p> </li> </ul> <p>An overview of writing serial CSY plug-ins is available in the <xref href="GUID-ED2F48EA-8C31-5729-B312-E925B7EC3B24.dita">Serial Protocol Modules (CSYs) Developer Tutorial</xref>. CSYs interact with the LDD and PDD that implements the serial port. </p> </li> <li id="GUID-8D8D5244-4292-56D3-AA99-5A7F3B4D3EF3"><p>Configure the ports at run-time using the <xref href="GUID-3B4E8ED5-72F7-3E51-B188-3C1045526DDF.dita"><apiname>RComm</apiname></xref> API. For more information see <xref href="GUID-EA83150B-8076-5EA5-BE78-962FB450E848.dita">How to Configure a Port: Tutorial</xref>. </p> </li> </ul> </conbody></concept>