NCR RealPOS 70, User Manual

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Chapter 12:
Cash Drawer Interface
Introduction
This document is intended to be a guide for writing software to use the
7402 cash drawer interface. It is intended to assist software engineers to
design and code software to control the cash drawer port. This is not a
specification on the cash drawer interface. The sample code included
has not been compiled or tested but can be helpful in coding the cash
drawer interface.
The 7402 cash drawer interface has unique signals to:
•
control the cash drawer solenoid(s) for up to 2 cash drawers.
•
enable the arming of an external driving circuit.
•
for reporting the status of the drawer, either open or close (input
signal).
Logic Description
long Initialize( );
Initialize () creates the mutex handles and opens the NCR port
driver if the OS requires it.
void Terminate();
Terminate() closes the handles to the mutexes and the NCR port
driver if opened.
long OpenPort();
OpenPort () initializes the port by calling QueryConf() and sets the
solenoid control bits and the arming bit to inputs.