Datasheet

ZEUS Embedded Linux Development Kit Quickstart Hardware configuration

Touchscreen

The 4/5-wire resistive touchscreen controller is integrated into the WM9712 AC’97

codec and is supported by the wm97xx-ts module. The Flat Panel Display option for

the Development Kit includes a 4 wire touchscreen. Before loading the touchscreen

driver, you must load the evdev module:

# modprobe evdev

# modprobe wm97xx-ts

The wm97xx-ts module is normally loaded automatically by evdev. You can load

it separately afterwards if you need to change options. Loading it multiple times

should have no adverse effect.

Alternatively, for a 5-wire touch screen the five_wire option is required:

# modprobe wm97xx-ts five_wire=1

Once the required modules have been loaded, you will need to calibrate your

touchscreen driver before it can be used accurately:

# TSLIB_TSDEVICE=/dev/input/event0 ts_calibrate

Once the framebuffer has been loaded and the touchscreen has been installed

and calibrated, you can start the X server with:

# startx &

Using MMC/SD cards

To access SD cards from the ZEUS, the appropriate drivers may need to be installed.

# modprobe pxamci

# modprobe mmc_block

If you have a suitable SD card inserted, it can now be accessed and formatted via

/dev/mmcblk0p1

The SD card interface is hot swappable so you can remove the card and insert it once

the driver has been loaded. As with any storage media, you may need to umount the

file system in AEL Embedded Linux first, to prevent data loss.

Only block devices are currently supported.