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Re: [Paparazzi-devel] Booz IMU v1.2 on LPC


From: Gautier Hattenberger
Subject: Re: [Paparazzi-devel] Booz IMU v1.2 on LPC
Date: Sat, 16 Jun 2012 15:16:45 +0200
User-agent: Mozilla/5.0 (X11; Linux i686; rv:12.0) Gecko/20120430 Thunderbird/12.0.1

Hi Christoph,

The HMC58XX driver is polling the sensor, so their is no need of the DRDY pin. Also the flag USE_I2C1 is already define by the subsystem, so you should not be necessary to define it again.

Gautier

Le 16/06/2012 00:13, Christoph Niemann a écrit :
Hi Felix,

thank you very much. As usual your response was very helpful.I was just using a really old version, since then it didn't build. Now I'm using the current v3.9 and it builds. But there are still some problems: If I define USE_I2C1 the LPC won't start at all, I wasn't able to reproduce this with a TWOG. Might it be a HW-Problem? I think I should use i2c1 since it should be 3.3V I2C.
Second: I'm using this (http://www.sparkfun.com/products/9371) Breakout Board from Sparkfun. It doesn't have the DRDY-Pin. I was able to solder a wire to the pad and could solder it accordingly, but: Will it work if I define HMC5843_NO_IRQ without DRDY for the AHRS?
Last but not least I saw the "original b2_v1.2 has a 1.8V Vreg. Is it really needed?
If there is somebody, who has answers for this questions help would be highly appreciated.

Cheers

Christoph

2012/6/15 Felix Ruess <address@hidden>
Hi Christoph,

the driver for the booz imu v1.2 on LPC21xx uses the arch independent driver hcm58xx, so you don't need an arch file...
See conf/firmwares/subsystems/shared/imu_b2_v1.2.makefile

Cheers, Felix

On Thu, Jun 14, 2012 at 9:53 AM, Christoph Niemann <address@hidden> wrote:
Hi everyone,

currently I'm trying to get some old booz Hardware to work. Everything is fine and works, but the mag doesn't. It's a Booz PCB set v1.1 . So the mag is currently a MS2100. I can see the LPC sends somesthing like 0x4B to the mag, but it doesn't pull DRDY. So I guess the MS2100 is broken. I have a HMC5843 here. So what I want to try to do is to just change the type of the IMU from v1.1 (MS2100) to v1.2 (HMC5843). But the arch file for the HMC on the LPC seems to miss. Am I making a misstake or do I have to implement it? Or has somebody already implemented it? Every help would be appreciated.

Cheers

Christoph

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