1 EDT ft5x06 based Polytouch devices 2 ---------------------------------- 3 4 The edt-ft5x06 driver is useful for the EDT "Polytouch" family of capacitive 5 touch screens. Note that it is *not* suitable for other devices based on the 6 focaltec ft5x06 devices, since they contain vendor-specific firmware. In 7 particular this driver is not suitable for the Nook tablet. 8 9 It has been tested with the following devices: 10 * EP0350M06 11 * EP0430M06 12 * EP0570M06 13 * EP0700M06 14 15 The driver allows configuration of the touch screen via a set of sysfs files: 16 17 /sys/class/input/eventX/device/device/threshold: 18 allows setting the "click"-threshold in the range from 0 to 80. 19 20 /sys/class/input/eventX/device/device/gain: 21 allows setting the sensitivity in the range from 0 to 31. Note that 22 lower values indicate higher sensitivity. 23 24 /sys/class/input/eventX/device/device/offset: 25 allows setting the edge compensation in the range from 0 to 31. 26 27 /sys/class/input/eventX/device/device/report_rate: 28 allows setting the report rate in the range from 3 to 14. 29 30 31 For debugging purposes the driver provides a few files in the debug 32 filesystem (if available in the kernel). In /sys/kernel/debug/edt_ft5x06 33 you'll find the following files: 34 35 num_x, num_y: 36 (readonly) contains the number of sensor fields in X- and 37 Y-direction. 38 39 mode: 40 allows switching the sensor between "factory mode" and "operation 41 mode" by writing "1" or "0" to it. In factory mode (1) it is 42 possible to get the raw data from the sensor. Note that in factory 43 mode regular events don't get delivered and the options described 44 above are unavailable. 45 46 raw_data: 47 contains num_x * num_y big endian 16 bit values describing the raw 48 values for each sensor field. Note that each read() call on this 49 files triggers a new readout. It is recommended to provide a buffer 50 big enough to contain num_x * num_y * 2 bytes. 51 52 Note that reading raw_data gives a I/O error when the device is not in factory 53 mode. The same happens when reading/writing to the parameter files when the 54 device is not in regular operation mode.
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