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Chris,<br>
<br>
typically "can can1 status" & "can can2 status" will give the
statistics of the buses, and "poller times on" will enable poller
timing statistics to be then shown by "poller times status".<br>
<br>
The Leaf uses can2 to query these values:<br>
<font face="monospace">// VIN [19]<br>
// QC [2]<br>
// L0/L1/L2 [2]</font><br>
<br>
…but only when the car is on, but not in drive mode. So you should
check if you get these values.<br>
<br>
It also uses can2 for TCU commands, if the model year is >= 2016.<br>
<br>
So you should try commands and see if they work correctly.<br>
<br>
Please also check the log for changes in can error occurence &
frequency.<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div class="moz-cite-prefix">Am 22.01.25 um 14:58 schrieb Chris Box
via OvmsDev:<br>
</div>
<blockquote type="cite"
cite="mid:010b01948e4e4b27-1a6b430d-e7dc-4d1f-8ace-2a7e05e33fee-000000@eu-west-2.amazonses.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<p>Thank you Derek and Michael.</p>
<p>I'm running this firmware from today, and have driven the car 8
miles so far without issue.</p>
<p>Happy to run any useful diagnostic commands. In case it helps,
the poller reports this.</p>
<p><code>OVMS# poller times status
</code><br>
<code>Poller timing is: off
</code><br>
<code>Type | count | Utlztn | Time
</code><br>
<code> | per s | [‰] | [ms]
</code><br>
<code>---------------+--------+--------+---------
</code><br>
<code>Poll:PRI Avg| 0.99| 0.632| 0.065
</code><br>
<code> Peak| | 0.733| 1.325
</code><br>
<code>===============+========+========+=========
</code><br>
<code> Total Avg| 0.99| 0.632| 0.653 </code></p>
<p>Chris</p>
<p><br>
</p>
<p id="reply-intro">On 2025-01-21 00:41, Derek Caudwell via
OvmsDev wrote:</p>
<blockquote type="cite"
style="padding: 0 0.4em; border-left: #1010ff 2px solid; margin: 0">
<div id="replybody1">
<div dir="ltr">Hi Chris
<div> </div>
<div>Here are the required changes, as I understand them, to
be compiled into a new firmware from this thread: <a
href="https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/pull/1102/files"
target="_blank" rel="noopener noreferrer"
moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/pull/1102/files</a></div>
<div> </div>
<div>Cheers</div>
<div>Derek</div>
</div>
<br>
<div class="v1gmail_quote v1gmail_quote_container">
<div class="v1gmail_attr" dir="ltr">On Tue, 21 Jan 2025 at
10:48, Michael Balzer via OvmsDev <<a
href="mailto:ovmsdev@lists.openvehicles.com"
rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">ovmsdev@lists.openvehicles.com</a>>
wrote:</div>
<blockquote class="v1gmail_quote"
style="margin: 0px 0px 0px 0.8ex; border-left: 1px solid #cccccc; padding-left: 1ex;">
<div>Chris,<br>
<br>
there is no prepared branch for these changes, as we
still try to determine the best (most compatible)
configuration.<br>
<br>
You need to apply the suggested changes manually to the
current master.<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div>Am 20.01.25 um 19:56 schrieb Chris Box via OvmsDev:</div>
<blockquote type="cite"
style="padding: 0 0.4em; border-left: #1010ff 2px solid; margin: 0">
<p>I'm happy to try some new code on my Leaf. Which
code should I use? The current master, or a
different branch? It wasn't clear to me from the
thread below.</p>
<p>Chris</p>
<p><br>
</p>
<p id="v1m_3502584311878067824reply-intro">On
2025-01-19 19:47, Derek Caudwell via OvmsDev wrote:</p>
<blockquote
style="padding: 0px 0.4em; border-left: 2px solid #1010ff; margin: 0px;">
<div id="v1m_3502584311878067824replybody1">
<div dir="auto">
<div dir="auto">I can't recall testing a later
version but I think Chris can confirm he was
on a later version when his Leaf had a similar
problem.</div>
<div dir="auto"> </div>
<div dir="auto">The Leaf is now my wife's daily
drive so I won't be able to take a look at
making the suggested changes for a couple of
weeks at least.</div>
<div dir="auto"> </div>
<div dir="auto"> </div>
</div>
<div>
<div dir="ltr">On Mon, 20 Jan 2025, 8:31 am
Michael Balzer via OvmsDev, <<a
href="mailto:ovmsdev@lists.openvehicles.com"
rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">ovmsdev@lists.openvehicles.com</a>>
wrote:</div>
<blockquote
style="margin: 0px 0px 0px 0.8ex; border-left: 1px solid #cccccc; padding-left: 1ex;">Derek,<br>
<br>
<div>Am 03.05.24 um 12:53 schrieb Derek
Caudwell via OvmsDev:</div>
<blockquote
style="padding: 0px 0.4em; border-left: 2px solid #1010ff; margin: 0px;">When
running <strong>firmware </strong><span
style="color: #002200; font-family: ui-monospace,'Cascadia Mono','Segoe UI Mono',Hack,'Source Code Pro','Roboto Mono',Menlo,Monaco,Consolas,monospace; font-size: 13px;"><strong>3.3.004-74-gbd4e7196</strong>
on my Nissan Leaf I suspect (but can't be
100% sure as it's only been 24h without
fault) the new poller caused the car to
throw the attached faults from overloading
the can bus whilst driving. The fault was
sufficient to send the car into limp mode
and could not be driven until cleared with
LeafSpy.</span></blockquote>
<br>
Build 3.3.004-74 (released 2024-04-30) did not
yet include the poller tracing control, i.e.
it did lots of logging for frames,
significantly affecting overall performance.<br>
<br>
Poller tracing control was introduced in <a
href="https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/commit/7e4046042a99339d0212aac8f874cc8f780e634e"
target="_blank" rel="noopener noreferrer"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/commit/7e4046042a99339d0212aac8f874cc8f780e634e</a>
on May 12.<br>
<br>
That commit was first included in build
3.3.004-103-g11fddbf6 released 2024-05-25. Do
you remember testing that build or a later
one?<br>
<br>
<br>
But as I still don't understand how a software
queue overflow could cause a bus crash, I've
also checked the 500 kbit timing for the
MCP2515 and found that may have the same issue
as the 125 kbit timing:<br>
<br>
Our timing is:<br>
<span style="font-family: monospace;"> case
CAN_SPEED_500KBPS:<br>
cnf1=0x00; cnf2=0xf0; cnf3=0x86;<br>
= PROP=1, PS1=7, PS2=7, SJW=1, Sample 3x
@56.3%</span><br>
<br>
Remember, the SAE/CiA recommendation is SJW=2,
Sample 1x @87.5%. That would translate to:<br>
<span style="font-family: monospace;">
PROP=5, PS1=8, PS2=2, SJW=2, Sample 1x
@87.5% =<br>
cnf1=0x40; cnf2=0xbc; cnf3=0x81;</span><br>
<br>
I also checked the Arduino MCP_CAN lib, and
that uses:<br>
<span style="font-family: monospace;">
cnf1=0x40; cnf2=0xe5; cnf3=0x83;</span><br>
<span style="font-family: monospace;"> =
PROP=6, PS1=5, PS2=4, SJW=2, Sample 3x @75%<br>
</span><br>
So our timing for 500 kbit/s on the MCP buses
also isn't as recommended.<br>
<br>
Derek, could you test the SAE/CiA
recommendation and the MCP_CAN config as
shown? Or anyone else with a live can2/can3
bus at 500 kbit?<br>
<br>
If these work, the question is which is the
more general setup we should adopt. Apparently
the MCP_CAN lib also does not follow the CiA
recommendation, I wonder if the MCP_CAN config
is a compromise for compatibility.<br>
<br>
Regards,<br>
Michael<br>
<span style="font-family: monospace;"></span></blockquote>
</div>
</div>
</blockquote>
<br>
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