Touchscreen Filters - Revision history

Glenn: /* Discussions */ spelling

2009-07-19T15:02:37Z

‎Discussions: spelling

2009-07-19T15:02:04Z

+cat

2009-01-09T13:10:30Z

‎Generic filters

2009-01-09T13:09:40Z

‎Group filter

2009-01-09T13:08:21Z

‎Linear calibration filter

2009-01-09T07:22:31Z

‎Intro

2009-01-09T07:12:31Z

‎Intro

2009-01-09T05:29:21Z

‎Why are we doing filtering in kernel space?

2009-01-09T05:16:28Z

Fix.

2009-01-09T05:14:17Z

Small fix.

@@ Line 259: / Line 259: @@
 == Discussions ==
-Let's link the discussions of the filters in mailing lists, tickets or furums.
+Let's link the discussions of the filters in mailing lists, tickets or forums.
 * [http://lists.openmoko.org/pipermail/devel/2008-December/003888.html How do I make Xglamo read directly from the touchscreen?]
 [[Category:Screen]]

← Older revision		Revision as of 15:02, 19 July 2009
Line 262:		Line 262:

	* [http://lists.openmoko.org/pipermail/devel/2008-December/003888.html How do I make Xglamo read directly from the touchscreen?]		* [http://lists.openmoko.org/pipermail/devel/2008-December/003888.html How do I make Xglamo read directly from the touchscreen?]
		+
		+	[[Category:Screen]]

@@ Line 96: / Line 96: @@
 Sources:
-[http://git.openmoko.org/?p=kernel.git;a=blob_plain;f=drivers/input/touchscreen/ts_filter.c;hb=andy-tracking drivers/input/touchscreen/ts_filter.c]
+* [http://git.openmoko.org/?p=kernel.git;a=blob_plain;f=drivers/input/touchscreen/ts_filter.c;hb=andy-tracking drivers/input/touchscreen/ts_filter.c]
-[http://git.openmoko.org/?p=kernel.git;a=blob_plain;f=include/linux/ts_filter.h;hb=andy-tracking include/linux/ts_filter.h]
+* [http://git.openmoko.org/?p=kernel.git;a=blob_plain;f=include/linux/ts_filter.h;hb=andy-tracking include/linux/ts_filter.h]
 Generic filters are not useful by themselves, they define an API that that actual

@@ Line 131: / Line 131: @@
 == Group filter ==
-Source: [http://git.openmoko.org/?p=kernel.git;a=blob_plain;f=drivers/input/touchscreen/ts_filter_group.c;hb=andy-tracking drivers/input/touchscreen/ts_filter_group.c]
+Source:
 This filter is useful to reject samples that are not reliable. We consider

@@ Line 197: / Line 197: @@
 == Linear calibration filter ==
-Source : [http://git.openmoko.org/?p=kernel.git;a=blob_plain;f=drivers/input/touchscreen/ts_filter_linear.c;hb=stable-tracking drivers/input/touchscreen/ts_filter_linear.c],
+Source :
 This filter allow us to scale touchscreen values using calibration data. It also exposes the calibration constants using sysfs.

@@ Line 7: / Line 7: @@
 In this document we describe the algorithms we use to make
-the touchscreen behave well. By "well" we mean that we can:
+the touchscreen behave well ( Check http://www.youtube.com/watch?v=4oPKaVno3jQ for an example ). By "well" we mean that we can:
 * Get reliable clicks with the stylus and with the finger

@@ Line 16: / Line 16: @@
 that have helped improve the touchscreen performance. As a result now
 we have a touchscreen filtering framework that we are using in Linux
-.6. We describe the current working solution as of December 2008 as
+.6. We describe the current working solution as of January 2009 as
 it is in the [http://git.openmoko.org/?p=kernel.git;a=shortlog;h=andy-tracking andy-tracking] branch of the Openmoko GIT repository.

@@ Line 47: / Line 47: @@
 In the latest driver we decided to add a generic filtering framework
-that could be used by more touchscreen drivers.
+that could be used by more touchscreen drivers. It also helps keeping the driver small,
 We are aware of [http://tslib.berlios.de/ tslib] and we use it with

@@ Line 22: / Line 22: @@
 We include videos showing how things improve as we add filters. In the
-videos we use a program that [http://lists.openmoko.org/pipermail/devel/2008-October/002712.html plots the points reported by the driver].
+videos we use a program that [http://lists.openmoko.org/pipermail/devel/2008-October/002712.html plots the points reported by the driver]. The videos are not polished (you might want to turn down volume) but they illustrate our points.
 == Our hardware ==