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<p class="MsoNormal"><span lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’m working on a project to synchronize the system time between two network devices by using the PTP-protocol (ptpd). Both device s are running the rt-kernel 3.2.30-rt45cpx+. This works fine (I think). But I want to verify
the synchronization and the jitter.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">After consideration I think the only possible way to acknowledge a precise measurement using an oscilloscope is to send a signal to a D-I/O pin from each pc and compare the signals. But this should be timed to change
the state to high or low on the exact full second. I think it’s called </span><span lang="EN">Pulse per Second (PPS)?!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN">My approach is to create a small C program that throws an Signal/Interrupt on a new second by using timer. But I’m stuck on this.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN">All timers I created are relative to the creation not absolute to the system time synchronized by ptp.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN">If anybody could give me a hint would be great ? Or does anyone have implemented something similar and could show me an example?
</span><span lang="EN-US"><o:p></o:p></span></p>
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Best regards<br>
<br>
p.p. Tim-Benjamin Rapp<br>
Software Development<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;line-height:115%;color:black">TRUMPF Laser GmbH + Co. KG<br>
Aichhalder Strasse 39<br>
78713 Schramberg<br>
Germany<br>
Phone: +49 7422 515-8456<br>
Tim-Benjamin.Rapp@de.TRUMPF.com<br>
www.trumpf-laser.com<br>
<br>
<br>
</span><span style="font-size:8.0pt;line-height:115%;color:gray">TRUMPF Laser GmbH + Co. KG, Schramberg, Amtsgericht Stuttgart HRA 480785<br>
Unlimited Liability Partner: Laser Verwaltungs-GmbH, Schramberg, Amtsgericht Stuttgart HRB 480880<br>
Managing Board: Dr. rer. pol. Lars Grünert, Dr. rer. nat. Klaus Wallmeroth<br>
<br>
</span><span style="font-size:10.0pt;line-height:115%"><o:p></o:p></span></p>
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