openptp

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Openptp is an opensource implementation of the Precision Time Protocol (PTP) version 2 [IEEE STD1588-2008].

1. Compilation run "make" in top directory

2. Installation run "make install" in top directory

3. Configuration Configuration is set in ptp_config.xml. A sample file can be found from top directory. XML schema can be found from ptp_config.xsd.

Configurable parameters:

• : commanline debugging on/off (1/0)
• <custom_clk_if>: custom clock interface on/off (1/0) (used currently to control multicast loopback used for timestamping)
• <clock_status_file>: enable/disable (1/0) debug file generation to /tmp (ptp_state.txt: master/slave, ptp_debug.txt: clock adjustment status in slave)
• <Interface>: enable/disable interfaces, multiple entries supported.
  • enable multicast on eth0: <Interface name="eth0"> 1 </Interface>
  • enable unicast only on eth1: <Interface name="eth1"> 0 10.1.2.3 10.1.2.5 </Interface>
• <one_step_clock>: enable unicast mode, HW SUPPORT REQUIRED!
• <Clock>: Clock configurations, see standard and ptp_config.c for possible values.
• <Intervals>: message rates, in power of 2, see standard (e.g. -4 means 16 messages per second)

4. Execution run "openptp ptp_config.xml"

Features included:

• Ordinary clock
• Boundary clock
• BMC alogorithm
• Asymmetry corrections
• Adjustable message transmission intervals
• Support for domains
• Timescale PTP
• Layer 3, UDP IPv4
• Unicast transmission

Features not included currently:

• End-to-end transparent clock
• Peer-to-peer transparent clock
• Management node
• PTP variance support
• Unicast negotiation
• Unicast discovery
• Security protocol