B&B Electronics 232OPSDA manual Low-Level Communications, deinitComPort

Syntax: C:

Pascal:

BASIC:

WORD initComPort (WORD portAddr, BYTE irq, LONG baudRate);

function initComPort (portAddr : word; irq

: byte; baudRate : longint) as integer;

FUNCTION initComPort% (BYVAL portAddr AS INTEGER, BYVAL irq AS INTEGER, BYVAL baudRate AS INTEGER)

Remarks: portAddr is the address of the serial port. irq is the interrupt request number that the serial port uses. baudRate is the speed at which the API talkes to the 232OPSDA module. Common port addresses and irq numbers are are:

Port	Address	IRQ
COM1	3F8H	4
COM2	2F8H	3
COM3	3E8H	4
COM4	2E8H	3

Returns: See Also:

deinitComPort must be called to remove the interrupt service routine installed by initComPort. The results are unpredictable if you terminate your application without calling deinitComPort.

A handle that uniquely identifies the installed serial port.

deinitComPort

Low-Level Communications

This section covers the low-level commands that are sent to the module through a serial communications port and the responses from the module. Detailed discussion of the command and responses are covered in Chapter 3. The examples shown here are in Microsoft® QuickBASIC. If you are programming in another language, this information can be used as a guideline for programming for the 232OPSDA module. To open and close a serial communications port in QuickBASIC use:

22Documentation Number 232OPSDA1397 Manual

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