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:
- <debug>: 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">
<multicast>1</multicast>
</Interface>
- enable unicast only on eth1:
<Interface name="eth1">
<multicast>0</multicast>
<unicast>10.1.2.3</unicast>
<unicast>10.1.2.5</unicast>
</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