MICROCHIP PTP Calibration Configuration Guide
Nhanganyaya
Ichi chinyorwa chekugadzirisa chinopa ruzivo rwekuita Port-to-port uye 1PPS calibrations kuvandudza nguva nekugadzirisa ingress / egress latencies.
Feature Description
Kushingirira kweCalibration Mibairo
Mhedzisiro kubva pakuita macalibrations anotsanangurwa pazasi anochengetedzwa kuflash kuitira kuti arambe achienderera kunyangwe mudziyo uchitenderedzwa nemagetsi kana kudzoserwa.
Kushingirira kurodhazve-defaults
Mhedzisiro kubva pakuita macalibrations anotsanangurwa pazasi anoramba zvakare pane kurodha-defaults. Kana reload-defaults ichagadzirisa chiyero kune yakavakirwa-mukati defaults, izvi zvinofanirwa kutsanangurwa separameter yekurodha zvakare-defaults kureva:
Kugadzirisa Otomatiki kweTimestamp Ndege Reference
Iyo CLI ine murairo unoyera mutsauko T2-T1 yePTP chiteshi mune loopback modhi uye yobva yagadzirisa otomatiki egress uye ingress latencies yechiteshi kuti T2 neT1 ive yakaenzana. Iyo calibration yakaitwa nemurairo uyu ndeyeiyo modhi chete iyo chiteshi chakanyatso gadzirirwa kuti chishande. Kuita calibration yemamodhi ese anotsigirwa nechiteshi, murairo uchafanirwa kudzokororwa kune yega yega modhi.
Syntax yemurairo ndeyekuti:
Iyo sarudzo 'ext' inotsanangura kuti yekunze loopback iri kushandiswa. Kana iyo 'int' sarudzo yashandiswa, chiteshi chinogadziriswa chemukati loopback.
Cherechedza: Kune masisitimu ane yakakura linkup-to-linkup latency variation (isina kubhadharwa serial-to-parallel barrel shifter chinzvimbo) iyo calibration inotora pasi chinongedzo kakawanda kuti ive nechokwadi chekuti calibration yaitwa kune yepakati kukosha (zvisingareve kukosha) .
Port-to-port calibration
Iyo CLI inoratidzira murairo wekuenzanisa chiteshi chePTP neruremekedzo kune imwe PTP chiteshi (referenzi port) yeimwe switch. Iyo calibration yakaitwa nemurairo uyu ndeyeiyo modhi chete iyo chiteshi chakanyatso gadzirirwa kuti chishande. Kuita calibration yemamodhi ese anotsigirwa nechiteshi, murairo uchafanirwa kudzokororwa kune yega yega modhi.
Syntax yemurairo ndeyekuti:
Iyo PTP yenhapwa yemuenzaniso yakabatana nechiteshi chiri calibrated inofanira kumhanya muprobe mode kuitira kuti pasave nekugadziriswa kuri kuitwa kunguva yePTP. Iyo calibration maitiro anoyera misiyano T2-T1 uye T4-T3 uye uchifunga zvakare tambo latency ita zvinotevera zvinogadziriswa:
- Gadzirisa ingress latency yechiteshi neT2-T1-cable_latency
- Gadzirisa egress latency yechiteshi neT4-T3-cable_latency
Cherechedza: Kune masisitimu ane yakakura linkup-to-linkup latency variation (uncompensated serial-to-parallel barrel shifter position) iyo calibration inotora pasi chinongedzo kakawanda kuti ive nechokwadi chekuti calibration yaitwa kune yepakati kukosha (kwete kureva kukosha).
Calibration kune External Reference uchishandisa 1PPS
Iyo CLI inoratidzira murairo wekugadzirisa chiteshi chePTP maererano nereferensi yekunze nenzira yechiratidzo che1PPS. Iyo calibration yakaitwa nemurairo uyu ndeyeiyo modhi chete iyo chiteshi chakanyatso gadzirirwa kuti chishande. Kuita calibration yemamodhi ese anotsigirwa nechiteshi, murairo uchafanirwa kudzokororwa kune yega yega modhi.
Syntax yemurairo ndeyekuti:
Sarudzo yesync inoita kuti chiteshi chiri pasi pecalibration kivhare wachi yayo frequency kune referensi uchishandisa SyncE. Sechikamu chemaitiro ekugadzirisa, iyo PTP yenhapwa muenzaniso yakabatana nechiteshi chiri pasi pekuenzanisa ichavhara chikamu chayo kune referensi. Kamwe muranda wePTP akanyatso kukiyiwa uye akagadzikana, iyo calibration inoyera iyo nzira yekunonoka uye kugadzirisa zvinotevera:
- Ingress latency = Ingress latency + (MeanPathDelay - cable_latency)/2
- Egress latency = Egress latency + (MeanPathDelay - cable_latency)/2
Cherechedza: Kutevera kuenzanisa kwakabudirira, iyo nzira yekunonoka ichave yakaenzana netambo latency.
Cherechedza: Kune masisitimu ane yakakura linkup-to-linkup latency variation (uncompensated serial-to-parallel barrel shifter position) iyo calibration inotora pasi chinongedzo kakawanda kuti ive nechokwadi chekuti calibration yaitwa kune yepakati kukosha (kwete kureva kukosha).
Calibration ye1PPS skew
Murairo we'ptp cal port' (pamusoro) unogadzirisa chiteshi chePTP kune referensi yekunze uchishandisa 1PPS. Iyi calibration haifunge kunonoka kubuda kweiyo 1PPS siginecha yechiteshi chiri pasi pecalibration. Kuti uite iyo 1PPS kuburitsa kwechishandiso pasi pecalibration ienderane ne1PPS yereferensi, iyo calibration inoda kubhadharwa kune 1PPS skew. Iyo CLI inoratidzira murairo wekugadzirisa iyo port calibration ye1PPS inobuda skew. Iyo calibration yakaitwa nemurairo uyu ndeyeiyo modhi chete iyo chiteshi chakanyatso gadzirirwa kuti chishande. Kuita calibration yemamodhi ese anotsigirwa nechiteshi, murairo uchafanirwa kudzokororwa kune yega yega modhi.
Syntax yemurairo ndeyekuti:
- ppt cal port offset
Cherechedza: Kune masisitimu ane yakakura linkup-to-linkup latency variation (uncompensated serial-to-parallel barrel shifter position) iyo calibration inotora pasi chinongedzo kakawanda kuti ive nechokwadi chekuti calibration yaitwa kune yepakati kukosha (kwete kureva kukosha).
1PPS Input Calibration
Iyo CLI inoratidzira murairo wekugadzirisa iyo port calibration yekunonoka kwe1PPS yekupinza.
Syntax yemurairo ndeyekuti:
- ppt cal 1pps
Usati wapa rairo, iyo 1PPS inobuda inofanirwa kubatana kune 1PPS yekuisa uchishandisa tambo ine kunonoka kunozivikanwa. Tambo ichave ipfupi sezvinobvira. Iwo murairo unogonesa iyo 1PPS kubuda uye samptora nguva yeLTC pane 1PPS yekuisa. The sampled LTC nguva inoratidza kunonoka kunoumbwa sezvinotevera: 1PPS inobuda buffer kunonoka + 1PPS yekupinda kunonoka + Cable latency Iyo 1PPS inobuda buffer kunonoka kunowanzo muhuwandu hwe1 ns. Kunonoka kwe1PPS kunofanirwa kuverengerwa uye kuchengetwa kuti ishandiswe gare gare kana PTP iri kushandisa 1PPS yekuisa.
End of Gwaro.
Zvinyorwa / Zvishandiso
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MICROCHIP PTP Calibration Configuration Guide [pdf] Bhuku reMushandisi PTP Calibration Configuration Guide |
