About QR Code linkage setting; About exclusive OR'ing in bytes - Page 47

 47 

(*2) 

With Micro QR, error correction level 4 is invalid, and the default setting is used. 

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Supplement:

About QR Code linkage setting

QR Codes have a linkage setting. 

A long character string can be divided into 2 to 16 partitions and printed. 

With ESC/P commands, it is necessary to enter only the number of partitions. 

For example, enter the bar code data as shown below when the print data is 

separated into three partitions. 

ESC i    Q or q    [parameters for 1st set]      [1st set of bar code data]      \\\ 

ESC i    Q or q    [parameters for 2nd set]      [2nd set of bar code data]      \\\ 

ESC i    Q or q    [parameters for 3rd set]      [3rd set of bar code data]      \\\ 

    3. Linkage setting: This determines whether or not the bar code data is partitioned. If 

the data is not partitioned, enter “0”. 

    If the data is not partitioned, the values for 4. Code number, 5. Number of partitions, 

and 6. Parity data are ignored, therefore, enter “0” as a dummy for these parameters. 

    4. Code number: This indicates which number the ESC/P command for that QR Code 

is for. 

      For example, if it is the second of four partitions, this value is “2”. If it is the fourth, this 

value is “4”. 

        5. Number of partitions: For this, enter the number of partitions. 

    6. Parity data: This is the value (

in bytes

) of 

exclusively OR

'ing all print data (print 

data before partitioning). Entering the same value as for the partitioned QR Code 

ESC/P command indicates that the codes are linked.

About exclusive OR'ing in bytes 

Data is exclusively OR'ed (XOR’ed) in bytes and in order. 

    For example, the hexadecimal values for the character string “1234” are “0x31, 0x32, 

0x33, 0x34”. 

        XOR’ing 0x31 and 0x32        0011 0001 ^= 0011 0010 results in 0000 0011 (0x03) 

        XOR’ing 0x03 and 0x33        0000 0011 ^= 0011 0011 results in 0011 0000 (0x30) 

        XOR’ing 0x30 and 0x34        0011 0000 ^= 0011 0100 results in 0000 0100 (0x04) 

        Therefore, the parity is “0x04”. 

        Note:

If this parity data value is incorrect, an incorrect QR Code is generated. 

Summary 

Printing the character string “123456789” with a 4-dot cell size, MODEL2, standard error 

correction level, and automatic data input