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Appendix Error! Main Document Only.Error! Main Document Only.7 - Configuring
Your Controller
Increasing the Untouch Wait Time
If you use a baud rate lower than the one recommended for certain serial
controllers, you may have to increase the Untouch Wait Time (-w flag) when
loading ELODEV.
If you are using a 16 inch or larger IntelliTouch touchscreen with controller
firmware prior to revision 2.2, you must specify the -w90 flag to increase the
Untouch Wait Time. The firmware revision level is displayed when ELODEV is
loaded, unless it is prior to 2.2.
Non-standard Serial Ports
ELODEV supports serial touchscreen controllers installed on serial ports other
than COM1 and COM2 if you write your own support code. The command syntax
for installing ELODEV is slightly different under this circumstance. See the
SetUserCom function in the ELODEV Programmer's Reference for more
information.
Choosing an Interrupt (IRQ) for PC-Bus Controllers
ELODEV requires all PC-Bus controllers to be in Interrupt Mode. Choose the
hardware interrupt (IRQ) carefully so it will not conflict with another device that
is in use while the application program is running. The following table lists the
devices normally assigned to each IRQ:
IRQ
XT
286/386/486 or later
2
IBM EGA, IBM network
Mapped to IRQ9
3
COM2
COM2
4
COM1
COM1
5
Hard disk controller
LPT2
6
Floppy disk controller
Floppy disk controller
7
LPT1
LPT1
Elo's recommendations on choosing an interrupt, in order of preference, are as
follows. Skip the IRQ if a conflict may exist.
XT: 7,3,4,2,6,5
286/386/486 or later: 5,7,2,3,4,6
