A-71
Using the TOUCHES Utility
TOUCHES is a DOS utility included on the TouchTools CD. It is also included
in the DOS and Windows 3.X driver available at
www.elotouch.com/Support/
dnld.asp#doswindows
. TOUCHES works through the ELODEV driver making
it useful for further diagnosis of hardware or calibration problems under DOS.
Run TOUCHES by typing "TOUCHES". Detailed instructions for using this
utility can be found in the TOUCHES section of the DOS and Windows Driver
Guide available at
www.elotouch.com/support/dwnldmnls.asp
.
Unlike COMDUMP, which displays a stream of bytes in hexadecimal,
TOUCHES displays decimal coordinate data. If ELODEV has been calibrated,
coordinates will be scaled 80x25. If ELODEV is loaded without the -c
calibration flag, and ELOCALIB is not run, raw coordinates will be displayed.
Unless you are proficient in hexadecimal, it is easier to check for linearity
problems with TOUCHES than with COMDUMP.
Raw coordinates for the E271-2210 serial controller should range from about
400-3800 for X and 600-3500 for Y. When the touchscreen is mounted in its
normal orientation, (cable exiting left-center), the origin will be in the lower-left
corner. If the touchscreen is installed with the cable exiting right-center, the
origin will be in the upper-right corner. Both X and Y should increase steadily
as you slide your finger from the origin to the diagonally opposite corner. Check
the other two corners to make sure their coordinates look correct and that the
touchscreen appears linear in each axis.
TOUCHES should display "TRUE" only when you lift your finger. If "TRUE"
releases are indicated while maintaining a constant touch, there may be
problems with system timing.
TOUCHES is also useful with PC-Bus controllers to verify the correct IRQ is
selected and there are no IRQ conflicts.
RS-232 Connections
Review cable connections and switch settings. If you have used your own cables
or adapters for connection to the serial port, check pinouts. Verify that the data
transfer rate (baud rate) of the computer's serial port is the same as selected by
switches or jumpers on the controller.
The E271-2210 controller operates at standard RS-232 levels. The serial port
connector, P2, is a 2x5 male header. Pin positions and signals are given below.
See page A-79 for DB9 and DB25 connector pin positions.
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