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[Paparazzi-devel] Lisa/L Octocopter with MMK Power Board Reseting Interm

From: Simon Wilks
Subject: [Paparazzi-devel] Lisa/L Octocopter with MMK Power Board Reseting Intermittently
Date: Mon, 2 Jan 2012 14:58:41 +0100

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.


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