B&B Electronics Parallel Printer Card PIOC Manual do Utilizador descarregar pdf (Página 28)

GHI Electronics,LLC USBwiz User Manual

1. USBwiz Functions

6.5. USB Printers

USBwiz Printer driver support those that have interface with unidirectional protocol. The

way USB printers work is very similar to Parallel port printers. But instead of the data going

over the Parallel port, it is transferred over USB. This means that the application needs to

know what data/scripts to be sent to the printer. USBwiz sends the data to the Printer as-is

where the user's application needs to use appropriate printer scripting, just like in Parallel

Port printers. Some of the printers scripts include PCL (from HP), ESC-P (from Epson.),

and Postscript.

Note that low cost printers do not have any available scripting. Sometimes these are called

“Windows only” printers. The reason behind the low cost is that the processor on these

printers is very simple, it gets pre-processed data from windows. The printer driver

software is actually what processes the image/text on the host PC and then sends final

data to the printer. These printers can't be used with USBwiz unless specifications are

provided by the manufacture, which are usually proprietary and very hard to obtain.

There is an easy way to test any USB printer, including those ones that do not have scripts

support. First, we need the printer connected to a Windows PC with installed drivers.

Create any simple document (small text file) on the PC and click print. This will bring up

the “Print” window. On the drop-down menu, select the printer you need to test with

USBwiz and then make sure you click the check-box “Print to file” as shown below.

Click “OK” and windows will prompt for a file name and location. Save the file anywhere

you like. This file contains a processed data for the printer you selected earlier. Now, all we

have to do is transfer the file to the printer using USBwiz.

Disconnect the printer from the PC and connect it to USBwiz. The file we generated earlier

can go on an SD card or USB drive.

First command to be used is USB register printer UP:

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