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Input: ntrig - convert documentation into ReST format
This file require minimum adjustments to be a valid ReST file.
Do it, in order to be able to parse it with Sphinx.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
authored by
Mauro Carvalho Chehab
and committed by
Dmitry Torokhov
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Documentation/input/ntrig.txt
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Documentation/input/ntrig.txt
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.. include:: <isonum.txt>
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=========================
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N-Trig touchscreen Driver
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-------------------------
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Copyright (c) 2008-2010 Rafi Rubin <rafi@seas.upenn.edu>
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Copyright (c) 2009-2010 Stephane Chatty
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=========================
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:Copyright: |copy| 2008-2010 Rafi Rubin <rafi@seas.upenn.edu>
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:Copyright: |copy| 2009-2010 Stephane Chatty
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This driver provides support for N-Trig pen and multi-touch sensors. Single
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and multi-touch events are translated to the appropriate protocols for
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The following parameters are used to configure filters to reduce noise:
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activate_slack number of fingers to ignore before processing events
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activation_height size threshold to activate immediately
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activation_width
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min_height size threshold bellow which fingers are ignored
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min_width both to decide activation and during activity
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deactivate_slack the number of "no contact" frames to ignore before
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propagating the end of activity events
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+-----------------------+-----------------------------------------------------+
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|activate_slack |number of fingers to ignore before processing events |
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+-----------------------+-----------------------------------------------------+
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|activation_height, |size threshold to activate immediately |
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|activation_width | |
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+-----------------------+-----------------------------------------------------+
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|min_height, |size threshold bellow which fingers are ignored |
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|min_width |both to decide activation and during activity |
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+-----------------------+-----------------------------------------------------+
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|deactivate_slack |the number of "no contact" frames to ignore before |
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| |propagating the end of activity events |
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+-----------------------+-----------------------------------------------------+
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When the last finger is removed from the device, it sends a number of empty
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frames. By holding off on deactivation for a few frames we can tolerate false
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----------------------
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These nodes just provide easy access to the ranges reported by the device.
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sensor_logical_height the range for positions reported during activity
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sensor_logical_width
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sensor_physical_height internal ranges not used for normal events but
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sensor_physical_width useful for tuning
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+-----------------------+-----------------------------------------------------+
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|sensor_logical_height, | the range for positions reported during activity |
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|sensor_logical_width | |
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+-----------------------+-----------------------------------------------------+
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|sensor_physical_height,| internal ranges not used for normal events but |
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|sensor_physical_width | useful for tuning |
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+-----------------------+-----------------------------------------------------+
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All N-Trig devices with product id of 1 report events in the ranges of
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X: 0-9600
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Y: 0-7200
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* X: 0-9600
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* Y: 0-7200
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However not all of these devices have the same physical dimensions. Most
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seem to be 12" sensors (Dell Latitude XT and XT2 and the HP TX2), and
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at least one model (Dell Studio 17) has a 17" sensor. The ratio of physical