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Re: [Paparazzi-devel] Airspeed_ETS on Lisa/m 2

From: Piotr Esden-Tempski
Subject: Re: [Paparazzi-devel] Airspeed_ETS on Lisa/m 2
Date: Thu, 13 Sep 2012 16:08:41 -0700


Why can't you use I2C1? It is level shifted to 5V already.

Cheers Piotr

Transition Robotics Inc.
the makers of the Quadshot
Co-Founder, Embedded systems Engineer
Mobile: +1 831 440 7454
Skype: esdentem

On Sep 13, 2012, at 3:35 PM, Tilman Baumann <address@hidden> wrote:

> On 13/09/12 23:20, Tilman Baumann wrote:
>> The Eagletree Airspeed module is VCC +5V (And subsequently the i2c levels I 
>> suppose)
>> Lisas i2c(2) port is +3.3 volt though.
>> Has anyone done this before? Does the ETS module perhaps run on +3.3V? Or do 
>> I need to buy a level converter? Any tips which chip I should use? (nice and 
>> small SOIC package with few external parts so I can do dead bug style 
>> construction on the connector)
> Oh well, that one was easy. If I need a level converter, the TI PCA9306DCTR 
> seems to do the trick nicely. Just needs two pullups and a filter cap.
> Will I need to do this?
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