Epson DM-D210 User Manual download pdf (Page 19)

Version 2.61 Feb. 2008

APPLICATION DEVELOPMENT GUIDE

LineDisplay (DM-D110/ DM-D120/ DM-D210)

Section 4. Expanded Functions

This section describes the expanded functions of the LineDisplay device.

4.1 DirectIO Function

The usage of the DirectIO method and DirectIOEvent event is described below.

4.1.1 DirectIO Method

Syntax DirectIO Command As Long, pData As Long, pString As String

Parameter Explanation

Command Output format. Normally set to DISP_DI_OUTPUT*.

pData Not used. Normally DISP_DI_DUMMY will be entered.

pString ESC/POS command, character variable storing the data

containing NULL.

* The DISP_DI_SYNC command of Ver1.xx can also be used.

Remarks The entire character strings set in the pString variable will be sent

to the communications port as it is. In case of sending to the

display, it is necessary to add the display selecting command

(ESC=2) before the data.

Return Either of the following values is returned, and stored in the

ResultCode property.

Value Meaning

OPOS_SUCCESS DirectIO successful.

OPOS_E_CLOSED Control is closed.

OPOS_E_NOTCLAIMED The device is not claimed.

OPOS_E_DISABLED Device is not enabled.

OPOS_E_ILLEGAL Command cannot be output to device.

OPOS_E_FAILURE

Problem with the device.

OPOS_E_OFFLINE

The device is offline.

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Epson DM-D210 User Manual Page 19