Need C code for HM55B compass of Parallax - Electronic Circuits Projects Diagrams Free

odense · 27th April 2006, 04:37 PM

I am working on HM55B compass but there is only a Basic sample code on the website of Parallax. Any guys used the device with AVR, especially, ATMEGA128 for robots or other applications? Can you share C code with me?
Thanks!

mmsya · 6th May 2006, 06:12 AM

Quote:

Originally Posted by odense

I am working on HM55B compass but there is only a Basic sample code on the website of Parallax. Any guys used the device with AVR, especially, ATMEGA128 for robots or other applications? Can you share C code with me?
Thanks!

I also need some info in this regard,

John.

**Nigel Goodwin** · 6th May 2006, 08:26 AM

Surely it's trivial to convert the BASIC code to C?, if you can't I suggest you read the datasheet and write the code from scratch.

mmsya · 7th May 2006, 02:00 AM

Hi Nigel,

Do we need to calibrate this chip or it is already calibrated in the factory? If we we calibrate what are we calibrating. Finding the max and min? I am a bit lost in this regard. I appreciate your help.

Thanks,
John.

**Nigel Goodwin** · 7th May 2006, 10:10 AM

Quote:

Originally Posted by mmsya

Hi Nigel,

Do we need to calibrate this chip or it is already calibrated in the factory? If we we calibrate what are we calibrating. Finding the max and min? I am a bit lost in this regard. I appreciate your help.

No idea, presumably the datasheet explains it?.

jess · 7th February 2007, 09:28 PM

I just posted an inquiry on the HM55B together with a URL for information. One doc I downloaded shows a flow chart which should help in PIC code development.

I'm looking for PIC code or experience with the module.

The URL gives some links to other info sources. There is some setup required but I didn't fully understand it. They use the term brad (binary radian). Best I can determine a brad = 1.4 degrees (8 bit resolution of 360 degrees).

Try: http://info.hobbyengineering.com/specs/PX-29123.pdf

Also try: http://www.parallax.com/detail.asp?product_id=29123 multiple info links

Jess

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27th April 2006, 04:37 PM	(permalink)
odense	Need C code for HM55B compass of Parallax I am working on HM55B compass but there is only a Basic sample code on the website of Parallax. Any guys used the device with AVR, especially, ATMEGA128 for robots or other applications? Can you share C code with me? Thanks! __________________ Learning by doing.

6th May 2006, 08:26 AM	(permalink)
Nigel Goodwin	Surely it's trivial to convert the BASIC code to C?, if you can't I suggest you read the datasheet and write the code from scratch. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

7th May 2006, 02:00 AM	(permalink)
mmsya	Hm55b Hi Nigel, Do we need to calibrate this chip or it is already calibrated in the factory? If we we calibrate what are we calibrating. Finding the max and min? I am a bit lost in this regard. I appreciate your help. Thanks, John.

7th February 2007, 09:28 PM	(permalink)
jess	I just posted an inquiry on the HM55B together with a URL for information. One doc I downloaded shows a flow chart which should help in PIC code development. I'm looking for PIC code or experience with the module. The URL gives some links to other info sources. There is some setup required but I didn't fully understand it. They use the term brad (binary radian). Best I can determine a brad = 1.4 degrees (8 bit resolution of 360 degrees). Try: http://info.hobbyengineering.com/specs/PX-29123.pdf Also try: http://www.parallax.com/detail.asp?product_id=29123 multiple info links Jess Last edited by jess; 8th February 2007 at 04:25 AM.