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Re: [Paparazzi-devel] lisa/m with mkk controller = problem

From: Thomas Wuensche
Subject: Re: [Paparazzi-devel] lisa/m with mkk controller = problem
Date: Thu, 27 Dec 2012 13:12:12 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0

I had - with another board - problems with
the clock speed on the I2C before, the cycle
time was to short to supply all ESCs with
the data on the octo. In my case just the ESCs
switched off.

Though it is a different situation you might
consider to search in the same direction (clock
speed and buffer size) for the I2C transfer.

Best regards, Thomas

On 27.12.2012 01:54, Eduardo Lavratti wrote:
anyone using 6 ou 8 MK esc with lisa/m ?

Today i put my lisa/m board on my BiG hexa.
This hexa fly very well with MK boards.
i have an mini octo that fly very well with mk boards too.

with lisa_m it fly some time and the lisa HANG resulting in crash.
in second test crashed again.

i make some tests in the bench.
i tested with big hexa setup and mini octo, all with i2c escs.

the result:
with 4 esc the lisa never hang.
With 6 esc  lisa hang after some time
with 8 esc lisa hang much faster than with 6.

i think it is a i2c buffer problem again.
I remember i configured the buffer last year an tell felix about this

i will do more tests today.

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EMS Dr. Thomas Wuensche e.K.
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