xiaotailang commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1911588604
Thank you very much for your detailed answer. Additionally, I would like to
express my gratitude for the assistance you've provided regarding PTP-related
issues throughout this
PetteriAimonen commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1911553559
That precision probably requires a specifically designed PTP-aware switch,
or a direct cable connection between two devices. It would also require adding
the hardware TX
xiaotailang commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1911260415
In the current design, if we want to further improve the precision, such as
to achieve a precision of 20-50ns, is there any way to do it?
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xiaotailang commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1911257462
ok! I really appreciate your patient answers.
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PetteriAimonen commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1909885453
It's just that transmission timestamps are not implemented in NuttX
currently. It could be added, but because of the RTOS nature, the packets go
out near immediately when
xiaotailang commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1909839291
Thank you again for your enthusiastic answers. I noticed that the PTP driver
only acquires the timestamp of received packets. According to the PTP protocol,
it should acquire
PetteriAimonen commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1909782439
The [best master
clock](https://en.wikipedia.org/wiki/Precision_Time_Protocol#Best_master_clock_algorithm)
algorithm is used:
xiaotailang commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1909663383
Hi@ PetteriAimonen, I am currently conducting a test with two STM32 boards
where one is set as the master and the other as the slave. Upon re-examining
the PTPd-related code in
xiaotailang commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1909182649
Okay, thank you very much for your suggestions.
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PetteriAimonen commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1908322541
No, I haven't seen errors anywhere near that magnitude.
I assume you are using latest ptpd from the nuttx-apps repo?
Can you try enabling `CONFIG_NETUTILS_PTPD_DEBUG`
xiaotailang commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1907668507
I obtain timestamps from the registers rdes2 and rdes3. After initializing
the descriptors, I backup the buffer addresses they point to. In the function
responsible for
xiaotailang commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1788447784
Thank you very much for the assistance you've provided
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PetteriAimonen commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1786517982
@xiaotailang For STM32F4x7 it works this way (from reference manual section
"Rx DMA configuration":
> If IEEE 1588 time stamping is enabled, the DMA writes the time
xiaotailang commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1786332829
hello everyone ! I encountered a problem while developing Ethernet PTP.
After enabling PTP function by setting PTP-related registers, a hardfault
occurred. Upon tracing the
xiaoxiang781216 closed issue #10887: how to support ptp
URL: https://github.com/apache/nuttx/issues/10887
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PetteriAimonen commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1756865534
Yes, for hardware timestamping it is needed for the hardware to have support
(STM32F4 hardware does have) *and* NuttX driver for the hardware to have
support.
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pkarashchenko commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1756843219
The ethernet packet timestamping is not something that can be handled by the
driver. I mean that of course we can extend the driver to add timestamps, but
those will be SW
xiaotailang commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1756831396
ok! Thank you very much.
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PetteriAimonen commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1756818627
Yeah, I'm currently working on PTP support for STM32F4 platform.
The PTP daemon is mostly done, with the few missing features noted in the
pull request linked above.
xiaoxiang781216 commented on issue #10887:
URL: https://github.com/apache/nuttx/issues/10887#issuecomment-1756710754
@PetteriAimonen add PTP support recently, you can reference the related
patch:
https://github.com/apache/nuttx-apps/pull/2101
https://github.com/apache/nuttx/pull/10827
xiaotailang opened a new issue, #10887:
URL: https://github.com/apache/nuttx/issues/10887
Hello everyone, if I want to add PTP (Precision Time Protocol)
synchronization functionality to NuttX system, how can I port ptpd or the PTP
sub-module from Linux to NuttX? Are there any reference
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