Re: [Paparazzi-devel] Lisa/L Octocopter with MMK Power Board Reseting Intermittently

[Felix Ruess]

Hi,

better late than never...
This could possibly be an i2c issue, maybe something else (as well?)
... or did you find out more already?

Regarding issue 2): is the whole lisa resetting, or just the motor
controllers? If the whole lisa is resetting it might be a power issue.

Issue 3) could very well be an i2c issue, I have experienced similar
things where it got stuck in an i2c interrupt routine with the current
i2c driver on the stm32.

See https://github.com/paparazzi/paparazzi/issues/71 for the current
status on the new i2c driver..

Cheers, Felix

On Wed, Jan 4, 2012 at 1:37 AM, Simon Wilks <address@hidden> wrote:
> Good new/bad news.
>
> First the bad:
> After looking through the i2c_arch.c code and trying out a lower clock rate
> on the I2C2 bus (Aspirin) it seemed to run longer until an issue popped up
> but I would need to test more before I could be sure of this. I started
> adding some code to indicate i2c errors using the LEDs but haven't finished
> that yet. I still have the feeling that this is somehow related to the
> Aspirin as unplugging it stops the failure occurring.
>
> And now for the good:
> I now have solved the problem a different way...kinda. Today the Lisa/M I
> ordered arrived (I didn't get it because of this) and I have set it up and
> connected it and it is running smoothly since about 15 minutes now without
> the slightest issue! So this is clearly something Lisa/L related. The only
> difference at the moment is that I don't have the GPS and XBee connected but
> I tried the Lisa/L out without these too with no change.
>
> So why is this? I would like to get the Lisa/L going but will settle for the
> Lisa/M.
>
> Thanks
>
> Simon
>
>
> On Mon, Jan 2, 2012 at 8:37 PM, Simon Wilks <address@hidden> wrote:
>>
>> When the motors are idling (they are drawing around 1A) if something goes
>> wrong everything resets. If leave them running with more throttle (drawing
>> 2A) the motors will hiccup but everything keeps working! Still not good, but
>> maybe a hint. Still digging...
>>
>>
>> On Mon, Jan 2, 2012 at 4:42 PM, Simon Wilks <address@hidden> wrote:
>>>
>>>
>>> On Jan 2, 2012 4:13 PM, "Eduardo lavratti" <address@hidden> wrote:
>>> >
>>> > Simon, i am not sure but i think the ESC use I2C1_bus and
>>> > sensors(aspirin / baro) use I2C2_bus.
>>> Correct.
>>>
>>> > Soo, the i2c queue for motor not use the same queue as sensors.
>>> > I not have any schematics here to confirm this question.
>>> It's just odd that when it's connected things screw up so fast. It could
>>> of course be something else though. The power distribution board was
>>> preassembled but it still could be something there.
>>> >
>>> > I remember that my lisa hang too on the first tests.
>>> > The problem occour because the 5v regulator work very HOT with 12v.
>>> > When i put a 7v regulator on V_in the problem are solved.
>>>
>>> OK. Worth a try. I am testing with a lab supply and I can try a lower
>>> voltage... or with a BEC.
>>>
>>> >
>>> > I not know anything about LISA/L board. This is my next aquisition if
>>> > lisa/m past on my tests .
>>> >
>>> > regards.
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> > Date: Mon, 2 Jan 2012 14:58:41 +0100
>>> > From: address@hidden
>>> > To: address@hidden
>>> > Subject: [Paparazzi-devel] Lisa/L Octocopter with MMK Power Board
>>> > Reseting Intermittently
>>> >
>>> >
>>> > What I have noticed so far:
>>> >
>>> > 1) Momentary Failure on All Motors
>>> > There will be a clicking sound, coming from no one particular motor and
>>> > the LED strips flash off and on very quickly and all continues normally. 
>>> > You
>>> > can see this happening in this video.
>>> >
>>> > 2) Reset
>>> > All idling motors stop as what appears to be a reset is issued on all
>>> > controllers (Lisa/L LED activity changes as well). This usually happens
>>> > within about 30-60 secs of arming the motors, but not always.
>>> >
>>> > 3) Lisa/L Freezes
>>> > If I leave the motors running idle eventually all motors shutdown and
>>> > the Lisa/L freezes, ie: LED 2 and 3 remain on and there is no more 
>>> > activity
>>> > in the GCS/Messages. Only a power cycle will fix this.
>>> >
>>> > What is interesting so far is that only 1) and 2) above happen when the
>>> > Aspirin IMU (v1.5) is connected. If I disconnect the IMU then I have only
>>> > noticed 3) happen once so far after about one hour testing. I tried a 
>>> > second
>>> > Aspirin and nothing changed. To make sure this was not because the motors
>>> > were all running at a constant speed seeing the IMU was not picking up 
>>> > small
>>> > movements I moved the roll/pitch controls without an issue.
>>> >
>>> > Is this an I2C issue? It seems like it could be the Lisa/L freaking
>>> > out. Perhaps too much is happening on the bus with 8 motors plus the IMU?
>>> >
>>> > I currently have I2C_TRANSACTION_QUEUE_LEN = 16.
>>> >
>>> > I will do more testing later in the day.
>>> >
>>> > Simon
>>> >
>>> > _______________________________________________ Paparazzi-devel mailing
>>> > list address@hidden
>>> > https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>> >
>>> > _______________________________________________
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>>> >
>>
>>
>
>
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