[Ovmsdev] CAN-3 broken again?

[Michael Balzer]

Greg,

ah yes, the esp-idf currently doesn't implement oneshot interrupts on levels, we need to do that ourselves.

Something along the base line of this:

https://github.com/espressif/esp-idf/issues/1234#issuecomment-342320583

…just with reversed logic, as we get triggered on low.

Regards,
Michael


Am 14.01.2018 um 20:36 schrieb Greg D.:
> hi Michael,
>
> Good try, but the whole system hangs, so I'm guessing that we're stuck in an infinite interrupt loop.  But that suggests that the issue is related to
> unbalanced interrupt processing somehow.
>
> I'm going to try for some diagnostic logging once it gets stuck, and see if I can identify its state.  The absolute reproducibility of the base issue leads me
> to think the reported empty interrupt issue (your prior email) is probably not it, but rather the driver is not handling some confluence of events properly. 
> I have no trouble running the HUD display, for example, but it doesn't produce the rapid transmit frames of the OBDWiz dongle.  Something about the transmit
> side is messing up the receive...  I wonder if we're getting an interrupt for both the last Tx frame being sent and the VIN request PID being received at the
> same time?  Transmit interrupts don't check for receive, and vice-versa.
>
> Will report back later today...
>
> Greg
>
>
> Michael Balzer wrote:
>> Greg,
>>
>> here's another report of level triggering solving the issue: https://community.nxp.com/thread/456907
>>
>> Can you please give that a try? I.e. change line 77 to:
>>
>>   gpio_set_intr_type((gpio_num_t)m_intpin, GPIO_INTR_LOW_LEVEL);
>>
>>
>> I'll also get a DB9 plug to implement Marks test solution.
>>
>> Regards,
>> Michael
>>
>>
>> Am 14.01.2018 um 17:52 schrieb Michael Balzer:
>>>
>>>> Hmmmm, I think level triggered interrupt would help here.
>>>
>>> We currently let the interrupt trigger on the negative edge (line 77). Maybe GPIO_INTR_LOW_LEVEL can help?
>>
>> -- 
>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>
>>
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>
>
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-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

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