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

[Eduardo lavratti]

Hello Christoph, i am using hmc5843 on my two twog board´s without problem.
i am using last 3.9 pull.

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Date: Thu, 19 Jul 2012 08:31:21 +0200
From: address@hidden
To: address@hidden
Subject: Re: [Paparazzi-devel] Issue using I2C on LPC

Dear List,

its me again. Now I have the ESCs working but the HMC doesn't anymore. It seems somehow to be a software-problem, because it also doesn't work, when using a TWOG.
As before by just defining I2C0 as HMC port in the makefile of the IMU, the LPC starts and the HMC connected to I2C0 works. Just defining I2C1 for the HMC results in a not starting LPC. By adding

imu_CFLAGS += -DI2C1_VIC_SLOT=12

to the Makefile, the LPC starts, but the Mag doesn't work. What am I doing wrong?

Thanks for your help

Christoph

2012/7/18 Christoph Niemann <address@hidden>

Hi Sergej!

That sounds really interesting! Also under the fact, that its much easier to get a hmc instead of a MS2100.
I think, imight have found the solution to my I2C-Problem: I removed r28 and r29 from the Mainboard. The Sensor gives data now. But there is still one thing left: To get the mkk escs to work. Those resistors where the pull-ups for i2c0 (the one for the escs).
I'll try it and report.

Cheers

Christoph

2012/7/18 Sergej Krukouski <address@hidden>

Hallo Christoph!

 

I’m working currently with booz hardware, and found out, that not every MS2100 sensor works with the paparazzi software.

I don’t really know the reason, my assumption was also the corrupted sensor.

I bought them over Novatronic, and 4 of 7 sensors didn’t work with the same software version. That’s weird and though they were delivered without any static electricity protection, I don’t really think now that they were corrupted. That could be a change in sensor’s protocol. I have really no idea what is the matter.

 

I’ve also used HMC5883 instead and with the relative old paparazzi version and it worked good. But the magnet field resolution is a bit less, in comparison with the MS2100.

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