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FulanoNadie

ASCII Table Clarification


I am trying to encode the Ctrl character in a Data Matrix barcode, but when I try anything in the form ~dXXX and have ProcessTilde (or ApplyTilde) on, I cannot encode Ctrl.

I thought (because of the following statement) that I could do so:

The ^ in the Char column refers to the control key. For example, pressing CTRL-G sends ASCII 7 to the PC and creates a bell sound.

Can you clarify what is going on?

Operating System: Windows, Mac, or Unix/Linux

05-10-17     894 day(s) ago    

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James

Best Answer

Unless your scanner possesses the ability to emulate certain keyboard functionality (also known as a keyboard wedge), Ctrl cannot be encoded in the barcode itself.

The leftmost column in the ASCII Table (for values below ASCII 32) gives the keyboard-equivalent of what you would press to create the character in the rightmost column.

For example, pressing Ctrl + M (^M) will output a Carriage Return (CR), as shown here:

image

To accomplish the same thing in a barcode, you could encode one of the following in the DataToEncode value (with ApplyTilde, ProcessTilde, or ProcTilde enabled):
• Linear/1D barcodes: ~013
• 2D barcodes (DataMatrix, QR-Code, or PDF417): ~d013


Posted 894 day(s) ago

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