... | ... | @@ -86,7 +86,7 @@ Rizzi |
|
|
### Q: When connecting the GPS-PPS or the 10 MHz GPS clock to the WhiteRabbit Switch, do I have to change/configure anything?
|
|
|
|
|
|
A: Yes, it is documented in the [Note on using WR Switch in Grandmaster
|
|
|
mode](https://www.ohwr.org/project/white-rabbit/uploads/ae3282acd8f9f6c5a9067b061202277d/wr_external_reference.pdf).
|
|
|
mode](https://ohwr.org/project/white-rabbit/uploads/ae3282acd8f9f6c5a9067b061202277d/wr_external_reference.pdf).
|
|
|
Note that the section "Supplying time-of-day information" is not valid
|
|
|
anymore.
|
|
|
|
... | ... | @@ -147,7 +147,7 @@ Amsterdam |
|
|
|
|
|
A: By the RT (i.e. realtime) log mentioned in the [Note on using WR
|
|
|
Switch in Grandmaster
|
|
|
mode](https://www.ohwr.org/project/white-rabbit/uploads/ae3282acd8f9f6c5a9067b061202277d/wr_external_reference.pdf)
|
|
|
mode](https://ohwr.org/project/white-rabbit/uploads/ae3282acd8f9f6c5a9067b061202277d/wr_external_reference.pdf)
|
|
|
we mean the messages generated by the LM32 CPU inside the Virtex FPGA.
|
|
|
They may provide useful information for debugging the timing subsystem.
|
|
|
They can be viewed by connecting a serial terminal to the the front left
|
... | ... | @@ -233,7 +233,7 @@ SyncE have a lot of legacy burden (compatibility with SDH). |
|
|
Consequently, SyncE equipment must be tolerant to quite "bad" clock
|
|
|
input. WR is not tolerant to the corner-cases required by SyncE, see the
|
|
|
report on [SyncE Characteristics of a White Rabbit
|
|
|
Switch](https://www.ohwr.org/project/white-rabbit/uploads/6de0c67da6a12f470af5a921279711ce/WR-SyncE-characteristics-report.v3-2015-02-27.pdf)
|
|
|
Switch](https://ohwr.org/project/white-rabbit/uploads/6de0c67da6a12f470af5a921279711ce/WR-SyncE-characteristics-report.v3-2015-02-27.pdf)
|
|
|
. Making WR PLL tolerant to clock characteristics required by ITU-T
|
|
|
G.8262 might result in deterioration of WR performance (e.g. requires
|
|
|
change in PLL bandwidth) or require a much more expensive oscillator.
|
... | ... | @@ -288,7 +288,7 @@ There is no software tool in the current release that will do this for |
|
|
you, so you would need to manually write to a proper register using
|
|
|
devmem. Please see page 9 (for endpoint base addresses) and page 33 (for
|
|
|
bit A\_GIANT) of the [White Rabbit Switch HDL software interface
|
|
|
document](https://www.ohwr.org/project/white-rabbit/uploads/0e90236d5e9b48b41424dfc695d23cc4/switch_hdl-sw-v4.0.pdf).
|
|
|
document](https://ohwr.org/project/white-rabbit/uploads/0e90236d5e9b48b41424dfc695d23cc4/switch_hdl-sw-v4.0.pdf).
|
|
|
E.g. for port 3 (endpoint no. 2) you would write to address
|
|
|
0x10030808.
|
|
|
KM3NeT uses the following commands to enable Jumbo frames on all
|
... | ... | @@ -339,7 +339,7 @@ devmem like: |
|
|
|
|
|
For more information about used registers please refer to [White Rabbit
|
|
|
Switch HDL-SW
|
|
|
interface](https://www.ohwr.org/project/white-rabbit/uploads/0e90236d5e9b48b41424dfc695d23cc4/switch_hdl-sw-v4.0.pdf)
|
|
|
interface](https://ohwr.org/project/white-rabbit/uploads/0e90236d5e9b48b41424dfc695d23cc4/switch_hdl-sw-v4.0.pdf)
|
|
|
|
|
|
Author: Adam Wujek
|
|
|
6/11/18
|
... | ... | @@ -467,7 +467,7 @@ Such commands as *ifconfig* or *tcpdump* will only show traffic (e.g., |
|
|
PTP, LLDP) that is destined to Linux CPU inside the switch. It will
|
|
|
*not* show traffic forwarded between WRS ports. The fields of
|
|
|
wrsw\_pstats are described on page 14 of [WRS HDL-SW interface
|
|
|
document](https://www.ohwr.org/project/white-rabbit/uploads/0e90236d5e9b48b41424dfc695d23cc4/switch_hdl-sw-v4.0.pdf)
|
|
|
document](https://ohwr.org/project/white-rabbit/uploads/0e90236d5e9b48b41424dfc695d23cc4/switch_hdl-sw-v4.0.pdf)
|
|
|
|
|
|
Author: Maciej Lipinski, Erik van der Bij,
|
|
|
[CERN](http://cern.ch)
|
... | ... | @@ -548,7 +548,7 @@ to make changes to the files inside the */etc*, you should modify them |
|
|
in the */usr/etc* and reboot the device. You can find more information
|
|
|
about the code layout of the WR Switch in the [Building and flashing
|
|
|
manual for v4.0
|
|
|
release](https://www.ohwr.org/project/white-rabbit/uploads/d9f33d5629092f4453ddd4b310297b9a/wr-switch-sw-v4.0_build.pdf)
|
|
|
release](https://ohwr.org/project/white-rabbit/uploads/d9f33d5629092f4453ddd4b310297b9a/wr-switch-sw-v4.0_build.pdf)
|
|
|
|
|
|
Author: Grzegorz Daniluk,
|
|
|
[CERN](http://cern.ch)
|
... | ... | @@ -812,4 +812,4 @@ Author: Adam Wujek, |
|
|
|
|
|
|
|
|
### Files
|
|
|
* [wr_external_reference.pdf](/uploads/ae3282acd8f9f6c5a9067b061202277d/wr_external_reference.pdf) |
|
|
\ No newline at end of file |
|
|
* [wr_external_reference.pdf](https://ohwr.org/project/white-rabbit/uploads/ae3282acd8f9f6c5a9067b061202277d/wr_external_reference.pdf) |
|
|
\ No newline at end of file |