Bar code decoding system

Details Bar code decoding system Bar code decoding system

G - Physics

06

K

G06K 7/10 (2006.01)

Patent

CA 2162474

The system includes a bar code scanner (24), digitizer (28), security circuit (26), general purpose computer (20), and a screen (22). The scanner (24) communicates with the computer (20) over a serial communications link utilizing the serial I/O port of the computer (20). The security circuit (26) prevents unauthorized transfer of data into and out of the microcomputer (20). Both signals representing the data which is scanned and signals representing commands to the scanner (24) and commands from the scanner (24) indicative of the status thereof are communicated over a plurality of lines in the communications link. Appropriate interrupts are generated to actuate the scanner (24) and to respond to the data. The microcomputer (20) translates the data which represents the width of each bar and the number of bars and the detection of the end of a bar code symbol into digital values which are stored in memory and presented for decoding in accordance with programming of the microcomputer (20) which decodes the symbol.

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