Talk:I2C Compass - Revision history

Cmair: /* Userspace vs kernel module */

2009-08-21T23:04:44Z

‎Userspace vs kernel module

2009-08-21T23:03:57Z

‎Userspace vs kernel module

2009-08-17T12:43:09Z

‎Please Stand By

2009-08-17T12:41:43Z

‎Pricing Updates

2009-08-09T14:26:05Z

2009-08-08T22:25:47Z

‎Userspace vs kernel module

2009-08-07T14:35:35Z

‎Userspace vs kernel module

2009-08-07T14:17:35Z

‎Userspace vs kernel module

2009-08-07T10:41:17Z

‎DIY-Kit

2009-07-30T18:21:16Z

‎More accurate pricing info coming up: typo

@@ Line 25: / Line 25: @@
 ::I got my order from digikey and soldered some ''thin'' wires to the HMC5843. After too many hours I managed to read some values from the chip, but the communication was very unreliable. I figured out that the wires from the Freerunner to the chip were too long. A shorter connection fixed the issue. The next problem was the very unstable internal state (unable to switch to continuous measurement mode), which was caused by insufficent power supply decoupling. A cap resolved the issue (as usual).
 ::The first measurement results are available from [http://gitorious.org/freerunner-navigation-board/pages/Measurement_results here].
 ==Hardware Related==

@@ Line 21: / Line 21: @@
 :I started to write a kernel driver for the HMC5843. Right now, all features are supported, but i can't test it with the real chip until my order from digikey arrives (maybe next week).
 :Get the source from [http://gitorious.org/freerunner-navigation-board/hmc5843 here]. --[[User:Cmair|Cmair]] 14:17, 7 August 2009 (UTC)
 ==Hardware Related==

@@ Line 62: / Line 62: @@
 === More accurate pricing info coming up ===
 I'm about to order a couple of samples for my experiments, after that I'll probably have more exact information about what taxes and customs duties apply. As soon as I come out of intensive care from the heart attack I'll have, I'll update the pricing section so you can get yours. --[[User:Drdeath|Drdeath]] 18:19, 30 July 2009 (UTC)
-== Please Stand By ==
+= Please Stand By =
 If it seems to you that update frequency has been rare for a while, you are right.
 I apologize for not having any updates on the prices up yet. A personal problem is currently taking much of my time, but it will hopefully be over soon, though not "well again" I'm afraid. Please stay faithful, this project WILL surface. Thanks in advance for your patience.--[[User:Drdeath|Drdeath]] 12:41, 17 August 2009 (UTC)

← Older revision		Revision as of 12:41, 17 August 2009
Line 62:		Line 62:
	=== More accurate pricing info coming up ===		=== More accurate pricing info coming up ===
	I'm about to order a couple of samples for my experiments, after that I'll probably have more exact information about what taxes and customs duties apply. As soon as I come out of intensive care from the heart attack I'll have, I'll update the pricing section so you can get yours. --[[User:Drdeath\|Drdeath]] 18:19, 30 July 2009 (UTC)		I'm about to order a couple of samples for my experiments, after that I'll probably have more exact information about what taxes and customs duties apply. As soon as I come out of intensive care from the heart attack I'll have, I'll update the pricing section so you can get yours. --[[User:Drdeath\|Drdeath]] 18:19, 30 July 2009 (UTC)
		+	== Please Stand By ==
		+	If it seems to you that update frequency has been rare for a while, you are right.
		+	I apologize for not having any updates on the prices up yet. A personal problem is currently taking much of my time, but it will hopefully be over soon, though not "well again" I'm afraid. Please stay faithful, this project WILL surface. Thanks in advance for your patience.--[[User:Drdeath\|Drdeath]] 12:41, 17 August 2009 (UTC)

← Older revision		Revision as of 14:26, 9 August 2009
Line 1:		Line 1:
		+	=General Note=
		+	If you have anything to add, please do not hesitate to do so. Do not let yourself be intimidated by the fact that this looks much like a wiki page by now. It is still the discussion page and meant to be used that way.
		+
	= Pre-Orders =		= Pre-Orders =
	Pre-orders of anything are non-binding so far and are to evaluate interest by the community. Please sign your name in the appropriate section.		Pre-orders of anything are non-binding so far and are to evaluate interest by the community. Please sign your name in the appropriate section.

@@ Line 16: / Line 16: @@
 Initial research in Linux I2C implementation (yes, believe it or not, I dived into this head-first without any prior knowledge of how linux i2c worked) revealed that besides direct kernel-space adressing, I2C devices can also be adressed from userspace via the device file system by means of the i2c-dev module. Since it will apparently be quite easy to actually bake together the contraption once I uncover a source of parts (which I haven't really looked into much so far), be ready to access the module from userspace for the time being, because actually writing a dedicated kernel module for the chip will definitely be the trickier part of the project. --[[User:Drdeath|Drdeath]] 00:14, 26 July 2009 (UTC)
-:I started to write a kernel driver for the HMC5843. As it seems it should be a pretty easy task. The current source is based on the pcf8574 driver code. Reading the measurement results and the status register should work right now, but i can't test it with the real chip until my order from digikey arrives (maybe next week).
+:I started to write a kernel driver for the HMC5843. Right now, all features are supported, but i can't test it with the real chip until my order from digikey arrives (maybe next week).
 :Get the source from [http://gitorious.org/freerunner-navigation-board/hmc5843 here]. --[[User:Cmair|Cmair]] 14:17, 7 August 2009 (UTC)

← Older revision		Revision as of 10:41, 7 August 2009
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	== DIY-Kit ==		== DIY-Kit ==
		+	I'm interested if price included shipment to Belgium is around 30 euro's max. and if there is some sort of software ready([[User:Toams\|Toams]] 10:41, 7 August 2009 (UTC))

	== Ready-made module ==		== Ready-made module ==

← Older revision		Revision as of 18:21, 30 July 2009
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	=== More accurate pricing info coming up ===		=== More accurate pricing info coming up ===
−	I'm about to order a couple of samples for my experiments, after that I'll probably have more exact information about what taxes and customs ~~dues~~ apply. As soon as I come out of intensive care from the heart attack I'll have, I'll update the pricing section so you can get yours. --[[User:Drdeath\|Drdeath]] 18:19, 30 July 2009 (UTC)	+	I'm about to order a couple of samples for my experiments, after that I'll probably have more exact information about what taxes and customs duties apply. As soon as I come out of intensive care from the heart attack I'll have, I'll update the pricing section so you can get yours. --[[User:Drdeath\|Drdeath]] 18:19, 30 July 2009 (UTC)