Carrol Touch Modular Flat Panel Specifications download pdf (Page 40)

CARROLL TOUCH Chapter 3 - General Programming Issues

Touch System Programmer’s Guide 3-11

Interrupt Mode

When using interrupt mode, the touch controller uses a PC hardware

interrupt to notify the application software that touch data is available in

the Data Register (Base Address). When the display is touched with

touch enabled, or an information request command is received by the

touch system, the touch system sends touch data to the Data Register.

The HBC then interrupts the host computer, indicating that data is

available in the Data Register. The application software’s interrupt

handler should perform an I/O read of the Data Register to receive a byte

of touch data from the touch system.

Resetting the HBC

The procedure to perform a hardware reset on the HBC is the same for

both interrupt and polling communication modes. To cause a hardware

reset of the touch controller, perform an I/O write to the Hardware Reset

Note that the value of the data byte written to the Hardware Reset

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Carrol Touch Modular Flat Panel Specifications Page 40