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Everyone,<br>
<br>
I've just pushed the poller receiver changes I announced into the
new "poller-rework" branch:<br>
<br>
<a
href="https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/commit/0b306ad4f5e7a1eb63a471a11ec7f1a6d69d8647">https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/commit/0b306ad4f5e7a1eb63a471a11ec7f1a6d69d8647</a><br>
<br>
<p class="commit-title" style="box-sizing: border-box; margin: 0px
0px 8px; color: rgb(5, 38, 76); font-size: 18px; font-weight: 600;
font-family: -apple-system, BlinkMacSystemFont, "Segoe
UI", Helvetica, Arial, sans-serif, "Apple Color
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text-indent: 0px; text-transform: none; white-space: normal;
widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px;
text-decoration-style: initial; text-decoration-color: initial;">OBD/UDS
Poller Receiver Rework:</p>
<div class="commit-desc" style="box-sizing: border-box; display:
block; margin: -5px 0px 10px; color: rgb(36, 41, 46); font-family:
-apple-system, BlinkMacSystemFont, "Segoe UI",
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initial;">
<pre style="box-sizing: border-box; font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace; font-size: 13px; margin-top: 10px; margin-bottom: 0px; max-width: 100%; line-height: 1.45; color: rgb(68, 77, 86); white-space: pre-wrap; overflow: visible; overflow-wrap: break-word;"> - Fix race condition between CAN RX and PollerReceive
- Separation of ISO-TP & OBD/UDS layer meta data analysis
- Fix incomplete meta data validation
- Allow single/multi frame responses on all service types
- Validate multi frame response sequences
- Fix single frame payload lengths
- Fix type 0x22 first frame payload offset & overall length
- Add negative response code handling → IncomingPollError()
- Add response frame timing control → PollSetResponseSeparationTime()</pre>
</div>
<br class="Apple-interchange-newline">
This rework has been on my list for some time before, as the
previous solution had some general shortcomings, especially by it's
hard coded coupling of the expected response transport form with the
request type, which fails already on some type 0x01 requests.<br>
<br>
The major bug in the receiver that now triggered the rework was in
the overall payload length calculation and the first frame payload
passing of the type 0x22 (VEHICLE_POLL_TYPE_OBDIIEXTENDED) multi
frame response handling. That up to now basically only turned up as
a visible issue for the Smart ED, as all other vehicles either don't
get multi frame responses on 0x22 queries or (like the Kia)
generally discard the first frame and don't use the overall length
at all.<br>
<br>
On the Smart ED, all handlers have been deliberately written
assuming the bug was a feature -- all payload addressing is shifted
by one byte. This needs to be rewritten now.<br>
<br>
All other vehicles should not see any difference and should not need
to change any code. Except maybe in the UpMiiGo development, which
isn't yet part of the master.<br>
<br>
Other bugs like the missing frame sequence validation and late
response detection may have been the causes for some spurious and
hard to track crashes and data errors. We should try to get this
change tested short term on "edge", so we can see if this actually
improves stability as I hope.<br>
<br>
As this is a major rework (mainly of the PollerReceive() method),
audits and tests are very welcome. I can only test on the Twizy,
which doesn't make much use of the poller yet.<br>
<br>
You can see what the new poller does by raising the log level for
"vehicle" to debug. Example of some Twizy regular polling:<br>
<br>
<tt>D (136323) vehicle: PollerSend(1): send [type=10, pid=C0],
expecting 743/763-763</tt><tt><br>
</tt><tt>D (136343) vehicle: PollerReceive[763]: process OBD/UDS
response 10(C0) frm=0 len=0 off=0 rem=0</tt><tt><br>
</tt><tt>V (136343) v-twizy: OBD2: ignored reply [10 c0]</tt><tt><br>
</tt><tt>D (137323) vehicle: PollerSend(1): send [type=21, pid=81],
expecting 743/763-763</tt><tt><br>
</tt><tt>D (137343) vehicle: PollerReceive[763]: process OBD/UDS
response 21(81) frm=0 len=4 off=0 rem=15</tt><tt><br>
</tt><tt>D (137373) vehicle: PollerReceive[763]: process OBD/UDS
response 21(81) frm=1 len=7 off=4 rem=8</tt><tt><br>
</tt><tt>D (137403) vehicle: PollerReceive[763]: process OBD/UDS
response 21(81) frm=2 len=7 off=11 rem=1</tt><tt><br>
</tt><tt>D (137423) vehicle: PollerReceive[763]: process OBD/UDS
response 21(81) frm=3 len=1 off=18 rem=0</tt><tt><br>
</tt><tt>D (137433) v-twizy: OBD2: got VIN='XXXXXXXXXXXXXXXXX'</tt><tt><br>
</tt><tt>D (138323) vehicle: PollerSend(1): send [type=21, pid=13],
expecting 743/763-763</tt><tt><br>
</tt><tt>D (138343) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=0 len=4 off=0 rem=106</tt><tt><br>
</tt><tt>D (138373) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=1 len=7 off=4 rem=99</tt><tt><br>
</tt><tt>D (138403) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=2 len=7 off=11 rem=92</tt><tt><br>
</tt><tt>D (138423) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=3 len=7 off=18 rem=85</tt><tt><br>
</tt><tt>D (138453) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=4 len=7 off=25 rem=78</tt><tt><br>
</tt><tt>D (138483) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=5 len=7 off=32 rem=71</tt><tt><br>
</tt><tt>D (138513) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=6 len=7 off=39 rem=64</tt><tt><br>
</tt><tt>D (138543) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=7 len=7 off=46 rem=57</tt><tt><br>
</tt><tt>D (138563) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=8 len=7 off=53 rem=50</tt><tt><br>
</tt><tt>D (138593) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=9 len=7 off=60 rem=43</tt><tt><br>
</tt><tt>D (138623) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=10 len=7 off=67 rem=36</tt><tt><br>
</tt><tt>D (138653) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=11 len=7 off=74 rem=29</tt><tt><br>
</tt><tt>D (138683) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=12 len=7 off=81 rem=22</tt><tt><br>
</tt><tt>D (138703) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=13 len=7 off=88 rem=15</tt><tt><br>
</tt><tt>D (138733) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=14 len=7 off=95 rem=8</tt><tt><br>
</tt><tt>D (138763) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=15 len=7 off=102 rem=1</tt><tt><br>
</tt><tt>D (138793) vehicle: PollerReceive[763]: process OBD/UDS
response 21(13) frm=16 len=1 off=109 rem=0</tt><tt><br>
</tt><tt>W (141323) v-twizy: OBD2 Cluster DTC NEW #01: 4/21 rev0 G1
INT MEM Ef| @ 57871km 11kph SOC=60% BV=14V TC=0 IC=255</tt><tt><br>
</tt><tt>W (141333) v-twizy: OBD2 Cluster DTC NEW #02: 4/1 rev0 G1
MEM| @ 57892km -1kph SOC=86% BV=14V TC=0 IC=255</tt><tt><br>
</tt><tt>W (141343) v-twizy: OBD2 Cluster DTC NEW #03: 1/37 rev0 G1
INT MEM Ef| @ 57892km -1kph SOC=86% BV=14V TC=0 IC=255</tt><tt><br>
</tt><tt>W (141353) v-twizy: OBD2 Cluster DTC NEW #04: 3/59 rev0 G2
INT MEM| @ 57926km 34kph SOC=78% BV=14V TC=0 IC=255</tt><tt><br>
</tt><tt>W (141363) v-twizy: OBD2 Cluster DTC NEW #05: 4/40 rev0 G2
MEM Ef| @ 57926km 35kph SOC=78% BV=14V TC=0 IC=255</tt><tt><br>
</tt><tt>W (141373) v-twizy: OBD2 Cluster DTC NEW #06: 3/58 rev0 G2
INT MEM| @ 58711km 41kph SOC=46% BV=14V TC=0 IC=255</tt><br>
<br>
A manual multi frame poll:<br>
<br>
<tt>I (147723) webcommand: HttpCommandStream[0x3f8540f4]: 3801804
bytes free, executing: x o r bm 2104</tt><tt><br>
</tt><tt>D (148323) vehicle: PollerSend(1): send [type=21, pid=4],
expecting 79b/7bb-7bb</tt><tt><br>
</tt><tt>D (148343) vehicle: PollerReceive[7BB]: process OBD/UDS
response 21(4) frm=0 len=4 off=0 rem=70</tt><tt><br>
</tt><tt>D (148353) vehicle: PollerReceive[7BB]: process OBD/UDS
response 21(4) frm=1 len=7 off=4 rem=63</tt><tt><br>
</tt><tt>D (148393) vehicle: PollerReceive[7BB]: process OBD/UDS
response 21(4) frm=2 len=7 off=11 rem=56</tt><tt><br>
</tt><tt>D (148433) vehicle: PollerReceive[7BB]: process OBD/UDS
response 21(4) frm=3 len=7 off=18 rem=49</tt><tt><br>
</tt><tt>D (148473) vehicle: PollerReceive[7BB]: process OBD/UDS
response 21(4) frm=4 len=7 off=25 rem=42</tt><tt><br>
</tt><tt>D (148513) vehicle: PollerReceive[7BB]: process OBD/UDS
response 21(4) frm=5 len=7 off=32 rem=35</tt><tt><br>
</tt><tt>D (148553) vehicle: PollerReceive[7BB]: process OBD/UDS
response 21(4) frm=6 len=7 off=39 rem=28</tt><tt><br>
</tt><tt>D (148593) vehicle: PollerReceive[7BB]: process OBD/UDS
response 21(4) frm=7 len=7 off=46 rem=21</tt><tt><br>
</tt><tt>
D (148633) vehicle: PollerReceive[7BB]: process OBD/UDS response
21(4) frm=8 len=7 off=53 rem=14</tt><tt><br>
</tt><tt>
D (148673) vehicle: PollerReceive[7BB]: process OBD/UDS response
21(4) frm=9 len=7 off=60 rem=7</tt><tt><br>
</tt><tt>
D (148713) vehicle: PollerReceive[7BB]: process OBD/UDS response
21(4) frm=10 len=7 off=67 rem=0</tt><tt><br>
</tt><tt>
OVMS# x o r bm 2104</tt><tt><br>
</tt><tt>Response:</tt><tt><br>
</tt><tt>08 cc 3c 08 d4 3c 08 cb 3c 08 d6 3c 08 ce 3c 08 |
..<..<..<..<..<.</tt><tt><br>
</tt><tt>d1 3c 08 d2 3c ff ff ff ff ff ff ff ff ff ff ff |
.<..<...........</tt><tt><br>
</tt><tt>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |
................</tt><tt><br>
</tt><tt>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |
................</tt><tt><br>
</tt><tt>ff ff ff ff ff ff ff ff 3c 3c |
........<< </tt><br>
<br>
An example of the new error response handling:<br>
<br>
<tt>I (165023) webcommand: HttpCommandStream[0x3f8479f4]: 3791052
bytes free, executing: x o r bm 221405</tt><tt><br>
</tt><tt>D (165323) vehicle: PollerSend(1): send [type=22,
pid=1405], expecting 79b/7bb-7bb</tt><tt><br>
</tt><tt>D (165343) vehicle: PollerReceive[7BB]: process OBD/UDS
error 22(1405) code=11</tt><tt><br>
</tt><tt>OVMS# x o r bm 221405</tt><tt><br>
</tt><tt>ERROR: request failed with response error code 11</tt><br>
<br>
Code 11 = "serviceNotSupported" (see ISO 14229 Annex A.1 for more
codes)<br>
<br>
<br>
Feedback is welcome.<br>
<br>
Regards,<br>
Michael<br>
<br>
<pre class="moz-signature" cols="72">--
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
</pre>
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