Q: How is the touch-screen re-calibrated on the DM3730, AM3703 Zoom kit?
A:
To re-calibrate the touchscreen follow these commands from the DM37x Linux BSP User Guide (1020203A) for the DM3730. Section 3.12

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The sample image includes support for the Zoom Development Kit?s touch screen via the special file /dev/input/event0. To view raw touch data, try the octal dump command and then touch the screen.

DM-37x# od –x /dev/input/event0
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To calibrate the touch screen, use the following commands:
DM-37x# export TSLIB_TSDEVICE=/dev/input/event0
DM-37x# export TSLIB_CALIBFILE=/etc/pointercal
DM-37x# export TSLIB_CONSOLEDEVICE=none
DM-37x# export TSLIB_FBDEVICE=/dev/fb0 DM-37x# ts_test
Verify touches respond appropriately, then type:
DM-37x# ts_calibrate

Products Included:
DM3730, AM3703, DM3730 Torpedo, DM3730 Torpedo + Wireless