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Re: [Paparazzi-devel] Issue using I2C on LPC


From: Gautier Hattenberger
Subject: Re: [Paparazzi-devel] Issue using I2C on LPC
Date: Tue, 17 Jul 2012 13:38:54 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.4) Gecko/20120510 Icedove/10.0.4

The file you have send is the one that works, right ? Can you also send the latest one that is not working. And the result of ./paparazzi_version (or ./paparazzi_git_version)

Gautier

On 17/07/2012 09:57, Christoph Niemann wrote:
Hi Gautier,

currently the booz board isn't mounted into the airframe. I wanted to get the avionics working completely before mounting it, so currently I can't start the Motors. I wanted to start the investigation by taking something, that was working before. So I took old repository for my Funjet and tried it with the old one. I attached the airframe file. I just changed some things needed to get it compiled (attitude->ahrs and ublox_lea5h->ublox).  Everything else was the same. In the old version I get (in this case) the BARO_ETS Messagge and the I2C works, in the new one not.
This morning I also tried something else: I took a plane containing a Tiny13 and ppzuav IMU (also I2C) and it was working -> so I'm suspecting it to be my fault in the configuration somewhere, but I don't know where.

Cheers

Christoph

2012/7/17 Gautier Hattenberger <address@hidden>
Hi Christoph,

Can you start the motors ? Can you send your airframe file (or use pastebin or alike) so we can see the what is your exact configuration. Thanks

Gautier


On 16/07/2012 23:23, Christoph Niemann wrote:
Dear Community,

some weeks ago, I wrote a mail about my problem, using the old booz IMU with the HMC5843 or HMC5883L with the lpc based booz ap.
Investigating this further, I found that for me, using the pretty current 3.9 branch (v3.9.2_testing-3-g38ebd01-dirty), the I2C for LPC doesn't seem to work at all.
I tried both the hmc5843 and hmc5883l on the booz board. It didn't work. Next I tried those boards using a TWOG, it did't work. I suspected there is an issue with the hmc driver, so I tried an ETS Baro, it didn't work either. So I tried the code from about a year ago (95a65a7-dirty). The baro was working.
What could be the Problem? I used a logic anaylzer, to investigate it further. in the working version, there was data going through the bus. In the new version both lines where high.
Every help would be appreciated.

Best Regards

Christoph


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