POS.NET Line Dispaly... How to Write Text?

Question

Hi all,

I have been trying for a week now to try to write text to a customer display using POS for .NET, but I couldn't magae to do it!  I'm trying to use LineDispaly class, but it seems so hard to code it!

Can anyone help me with t sample code on how to use it?

I'm using a Cusomer Display With RS323 serial port and it has two lines.

thanks a lot!

Waleed

Answer 1

Do you have a service object or OPOS driver installed for the Line Display?

Below is some VB.NET code.

-Sean

 

  Dim explorer As PosExplorer
  Dim display As LineDisplay


    explorer = New PosExplorer(Me)
    Dim device As DeviceInfo = explorer.GetDevice("LineDisplay", "WPD220")
    display = explorer.CreateInstance(device)

    display.Open()
    display.Claim(1000)
    display.DeviceEnabled = True
    display.ClearText()
    display.DisplayText("Hello")

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www.sjjmicro.com / www.seanliming.com / www.annabooks.com, Book Author - ProGuide to WES 7, XP Embedded Advanced, WEPOS / POS for .NET Step-by-Step

Answer 2

Actually there is no OPOS drivers came with it! the manufacture say it is generic.

on the device specifications  written:

VFD--220

BaundRate: 9600 N 8 1

CommandType: ESC/POS

Char: 1   FontSet: 0

Do I really need a OPOS drivers? where can I get them for this device?

Thanks for the code. I'll try it today, hope it works!

Waleed

Answer 3

Yes, you need an service object or an OPOS driver that acts as the middle layer between the application and the hadware.

The line in the code: Dim device As DeviceInfo = explorer.GetDevice("LineDisplay", "WPD220") created the link to the OPOS driver I used for my poll display.

 If a driver doesn't exist you will have to create one. Do a search there looks like the protocol is exposed to write a driver - http://www.seetron.com/vfd220.html.

-Sean

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www.sjjmicro.com / www.seanliming.com / www.annabooks.com, Book Author - ProGuide to WES 7, XP Embedded Advanced, WEPOS / POS for .NET Step-by-Step

Answer 4

Thanks,

I have downloaded the IEE drivers for Line Display from your website link,  and added a device and added a logical name to it using POSMD and tried the code you gave to me,

when I get to the Open() method, I receieve an Exception: "Method Open Thrown an Exception. The service object returned a failuer status from its open call, but doesn't have more specific failuer code"

is there might be a solution ?

I also istalled Latest  CCO files but really don't know what to do with them!

Appreciate the help.

 

Waleed

Answer 5

The links are references to POS device manufacturers. Is your display IEE or is it a different manufacturer? If it is for a different manufacturer the IEE drivers might not work.

-Sean

 

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www.sjjmicro.com / www.seanliming.com / www.annabooks.com, Book Author - ProGuide to WES 7, XP Embedded Advanced, WEPOS / POS for .NET Step-by-Step

Answer 6

I Actually bought it from Chine, No mention for the manifacture of origin of it.

I even tried to communicate with it using the TYPE CON> COM1 command in DOS, but the display doesn't seem to understand or respond.

Tried also the SerialPort calss in C# to write to it but no joy! :-( :-(

Is there any other way I can use to communicate with it? Or I need to have OPOS drivers for that ?

Waleed.

Answer 7

It would be easier to develop a service object for it, but if you cannot communicate with it via a terminal session there is something else wrong with the unit.

-Sean

 

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www.sjjmicro.com / www.seanliming.com / www.annabooks.com, Book Author - ProGuide to WES 7, XP Embedded Advanced, WEPOS / POS for .NET Step-by-Step

Answer 8

Thanks All for the help.

Solved ! I needed to send a HEX to display controller.