[Ovmsdev] Volt/Ampera CAN Logs

[R. Scott Perry]

I have seen some like that, too, that might go 10 20 30 40 10 20 30 40 
10 20 30 40 and keep repeating the same way.
                       -Scott

On 6/28/2012 8:29 AM, mikeljo at mac.com wrote:
> Hi,
>
> yesterday i got some Logs.
> I do one log for each action. Lock/unlock car, open/close door, Remote
> start, Plugin/remove Charging Plug, .....
> I do the action in 5 second interval.
> I think i found some IDs.
> And i found something interesting: Some IDs cycle 4 with 4 times Blocks.
> That mean there is a counter or an adress field in one data field that
> repeats after 4 times. It counts like 10 20 30 40, FF FE FD FC, or......
> the rest of the data fields change there value.
> Can anybody confirm?
> Didi anybody see this before?
> I can see this after sort the Logs (Excel). As Sort field i use the ID.
> So i can see the value changing over time.
>
> Bye
> Michael
>
>
>
> Am 11.06.2012 um 16:39 schrieb Michael Jochum:
>
>> Hi,
>>
>> today i got some Logs from both Expansion Buses (DS (Chassis
>> Expansion), RH(High Voltage Powertrain Expansion), Pin 12 and 13).
>> Made an Cable for this.
>> The trc are the time stamped Logs. The txt show only the IDs, the last
>> Values and some comments from me.
>> Unfortunately both stops after 5-10 seconds the car switched of.
>> Car stands still. Clear sky view.
>>
>> <20120612-Michas Volt Logs>
>>
>> Next i made a Cable for the RH High Voltage Energy Management BUS (Pin
>> 3 and 11) and than a cable for the Low Speed GMLAN (SWCAN ~33.3kbps) -
>> Body Electrical Services Only at Pin 1 DS.
>> Bye
>> Michael
>>
>>
>>
>> Am 02.06.2012 um 18:45 schrieb R. Scott Perry:
>>
>>> Hi Michael,
>>>
>>> I cannot find the data from 32A does not appear elsewhere in the logs.
>>>
>>> My guess is that OnStar uses a separate GPS system than the
>>> navigation, and OnStar sends the latitude/longitude on 32A, and the
>>> navigation system sends it on a different bus (or, hopefully, on the
>>> same bus but with a different CAN ID).
>>>
>>> I'll take a look at your log file, and see if I can find the GPS
>>> information, if it is in there.
>>> -Scott
>>>
>>>
>>> On 6/2/2012 7:16 AM, Michael Jochum wrote:
>>>> Hi Scott,
>>>>
>>>> can you check that the data from ID 32A is somewhere else in your logs?
>>>> in mine 32A is always zero. We have here no OnStar. But i have the
>>>> full package including Navigation.
>>>>
>>>> Bye
>>>> michael
>>>>
>>>>
>>>>>
>>>>> The latitude/longitude conversion is almost the same as what you
>>>>> have for the Tesla, with two exceptions -- changing the 2048 to
>>>>> 1000, as noted, and the accounting for negative numbers is
>>>>> different. It seems that the number the Volt supplies is a 31-bit
>>>>> signed integer. The easiest way to handle that, I think, would be
>>>>> to add "latlon = latlon<< 1;" before checking for<0, and then
>>>>> "latlon = latlon>> 1;" afterwards. Running the code you have with
>>>>> those two changes seems to work fine.
>>>>>
>>>>> The bad news is that I have checked all my log files (I have been
>>>>> logging almost all the time I have driven for about 8 months now),
>>>>> and the CAN ID 32A (latitude/longitude) has never shown all zeroes.
>>>>> If the GPS data is unobtainable, I believe the car reports the most
>>>>> recent reading. The GPS data comes from the OnStar system, so I am
>>>>> thinking it may only provide the data if the OnStar service has
>>>>> been activated, which could be a problem for owners outside of
>>>>> U.S/Canada.
>>>>>
>>>>
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