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<p class=MsoNormal>Hi<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I try to understand the synchronization mechanism in the IGH
master for DC.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I try to understand what happens in the example/dc_user
directory<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Here is part of the code I try to understand including the
questions<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
app_time.tv_usec += 1000000 / FREQUENCY;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
if (app_time.tv_usec >= 1000000) {<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
app_time.tv_usec -= 1000000;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
app_time.tv_sec++;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'> }<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
ecrt_master_application_time(master, EC_TIMEVAL2NANO(app_time));<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:red'>What
is the result of this call for the slaves (after the ecrt_master_send call)??<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
if (sync_ref_counter) {<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
sync_ref_counter--;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'> }
else {<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
sync_ref_counter = 9;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
ecrt_master_sync_reference_clock(master);<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:red'>What
is the result for the slaves of this call for the slaves (after the
ecrt_master_send call) ??<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'> }<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
ecrt_master_sync_slave_clocks(master);<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:red'>Here
I assume that after the ecrt_master_send all the slave clocks are synchronized
with the DC master clock and the DC master clock will not be changed. Correct
??<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
// send process data<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
ecrt_domain_queue(domain1);<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
ecrt_master_send(master);<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Kind regards<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Peter<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Peter
van Knippenbergh<o:p></o:p></span></b></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Test
and Software designer<o:p></o:p></span></i></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'></span></i><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>_____________________________________________________________</span><i><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></i></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:gray'>Sioux. Source of your development.</span><span style='font-size:
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<p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Visit
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
</span><span style='font-family:"Arial","sans-serif"'><br>
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