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5.10
Touch screen connector – J50
Fig. 23: Touch screen connector
The 4-wire resistive touch controller signals are routed to J50, a 4-pins,
1mm pitch vertical ZIF. The touch controller is a TI TSC2003 device,
connected to the I
²
C2 bus (address 0x1001000b).
The following table reports the connector's pinout:
Pin #
SOM pin
#
Pin name
Function
Notes
1
-
TSC_YP
Touch controller Y+
2
-
TSC_XP
Touch controller X+
3
-
TSC_YM
Touch controller Y-
4
-
TSC_XM
Touch controller X-
5.10.1
Accessing the peripheral
The touch controllet is attached to the generic Linux input event interface
(
evdev
). For additional information, please refer to
Documentation/input/input.txt.
5.10.1.1
Touch screen calibration and test:
The simplest tools for touch screen management are the
tslib
library
and
ts_tools
utilities. To calibrate the touch screen, the
ts_calibrate
command line tool is available.
After calibration, the touch screen can be tested using the graphical
ts_test
utility or the
ts_print
command line tool.
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Summary of Contents for SBC AXEL
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