JP2742153B2 - Printer received code analysis method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for analyzing a received code of a printer for checking whether or not a code received by a printer from a host computer has a data error.

[0002]

2. Description of the Related Art When an abnormality such as a disorder of ruled lines, a displacement of a space or a character, or a deformation of a character typeface occurs in a printing result of a printer, an error occurs in output data given from the host computer to the printer. It means there is. To find the cause of the error, the host computer tells the printer what code (command,
Parameter or print data).

A code output from a host computer to a printer is normally output as 1-byte data having an 8-bit configuration.
Since the code is a binary sequence of “0” and “1”, even if the printer receives and prints out the code received from the host computer by one byte of data (hereinafter referred to as “printing”), the meaning of the data remains unchanged. Because it is not known, it is not possible to analyze where and what kind of output data error exists.

Therefore, the conventional reception code analysis method divides a code received from a host computer into upper 4 bits and lower 4 bits, and expresses each 4 bits in hexadecimal, and sequentially converts each data into hexadecimal. Converted and printed. FIG. 1 shows such a reception code printed in hexadecimal (usually called a hexa-dump).

As is apparent from FIG. 1, the hexa-dump simply displays all the received codes in hexadecimal numbers.
I do not know which is the print data.

Therefore, conventionally, in order to analyze a received code, a command list in which each hexadecimal number and its meaning are described in correspondence with each other is prepared, and the command list shown in the above hex dump is prepared.
The received code in hexadecimal notation (for example, 1B, 25 in FIG. 1,
33, 34...) One by one against the command list one by one, and the meaning must be confirmed while adding to the hexadump.

[0007]

Therefore, in code analysis, it takes a very long time to print a hexa-dump by a printer and to check each hexadecimal number of the printed hexa-dump and a command list by an operator. , The meaning of the command is not known until it is matched, and the hexadecimal dump is printed uniformly and continuously from the start to the end of reception of the received code regardless of whether or not the received code has an error. Therefore, it was not possible to easily find out whether or not the received data contained an error, and there was a problem that the operator was very tired.

The present invention has been made in view of the above points, and has as its object to eliminate the need for an operator to perform an analysis using a hexadump. In other words, by causing the printer itself to analyze the received code and printing in a different mode according to the analysis result, the operator can easily understand the contents of the received code simply by looking at the printed one. It is another object of the present invention to make it possible to determine the presence or absence of a data error and to recognize the error occurrence position at a glance.

[0009]

In order to achieve the above-mentioned object, a method for analyzing a received code of a printer according to the present invention converts a received code from a host computer into a control code and a print code based on a predetermined standard code. Classification process to classify, the command included in the received code classified into the control code by the classification process is converted into a symbol attached to each command in advance and printed, and when the command has a parameter, The parameters are converted into a predetermined decimal number based on the form of each command,
The parameters in decimal notation are printed collectively for each control code accompanying the symbol of the command, and the received code classified into the control code is composed of one or more control codes. Only when located at the beginning of the code group, a control code process for performing printing corresponding to the control code after performing a line feed, and a received code classified as a print code by the classification process from the end of the control code In the print code processing for printing a new line and displaying in hexadecimal notation, and in the classification processing, when a command included in the reception code classified as the control code is undefined, a line feed is performed at that time and the line is undefined. In the undefined command process of printing the received code indicating the command in hexadecimal notation, and in the control code process, Parameter when those undefined, a new line at that time, is characterized by having a undefined parameter processing for printing the received code showing the undefined said parameters in hexadecimal notation.

[0010]

According to the method of the present invention, the received code from the host computer is classified into a control code and a print code based on a predetermined standard code, and the received code classified into the control code is included in the control code. The command is converted into a symbol corresponding to the command and printed. If a parameter is added to the command, the parameter is set to 10
It is converted to a decimal number and printed along with the above parameters. At this time, only when the received code classified as the control code is located at the beginning of the control code group including one or more control codes, the line and the line corresponding to the control code are printed after the line feed. The received codes classified as print codes are printed in hexadecimal notation starting from the end of the control code received prior to the print code.

If the command included in the received code classified as the control code is undefined, that is, if a data error has occurred, a line feed operation is performed at that time to execute the undefined command. The reception code indicating
Print in hexadecimal notation. If the parameter attached to the command is undefined, that is, if a data error has occurred, a line feed operation is performed at that point and the received code indicating the undefined parameter is displayed in hexadecimal. Print with.

[0012]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows a received code having the same contents as the received code shown in FIG. 1 analyzed by a printer analyzing apparatus according to the method of the present invention, and the output is printed.

The contents printed in each paragraph of FIG.
FIG. 3 shows one block correspondingly.
That is, first the paragraphs control code A ₁ in FIG. 2, the following paragraphs print data B ₁ to be printed according to the print format set by the control code is represented respectively, and the same In the order, the other control codes and the print data A ₂ , B ₂ ; A ₃ , B _3, ...
Output is printed. In other words, the control code and the print code are printed alternately by changing paragraphs and displayed. In addition, as shown in FIG. 4, in the columns of the respective control codes, a symbol, a data amount,
Connection data, parameters, and the like are printed in the order in which they were received.

Subsequently, the received code shown by the hexa-dump in FIG. 1 is analyzed by the method of the present invention,
Whether the analysis output data of FIG. 2 is created will be described with reference to FIGS. FIG. 5 shows an analyzer for implementing the method of the present invention. FIG. 6 is a flowchart for explaining the operation of the apparatus.

The analyzing apparatus comprises a CPU 10, a RAM 20, and a part of a ROM 30 which constitute a computer of the printer. The CPU stores a code received from a host computer (not shown) via a communication control unit and an interface (not shown) in a received code storage unit 21 of the RAM.

The CPU 10 includes a code type discriminating unit 1 as means for realizing functions required for the method of the present invention.
1, a symbol conversion unit 12, and a parameter type determination unit 13
, A first parameter converter 14, a second parameter converter 15, a hex value converter 16, and an editor 17.

The code type determining section 11 determines whether the type of a received code (hereinafter, referred to as a received code) corresponds to a control code (command) or a print code. When the received code is a control code, that is, a command, the symbol conversion unit 12 converts the received code into a symbol corresponding to the command. The parameter type determination unit 13 performs a process when a parameter is received following the command. , The type of the parameter. Then, the first parameter conversion unit 14 determines that the received parameter is of a first type, for example, a 2X type (2 is a hexadecimal value of the second digit of 2 and X is a hexadecimal value of the first digit in various ways. ).
The second parameter conversion unit 15 converts the received parameter into a second type, for example, a 3X type (3 is a second digit hexadecimal value of 3, and X is a second type). If the single digit hexadecimal value changes in various ways, the parameter is converted to a predetermined value. If the received code is a print code, the hex value conversion unit 16
For example, based on the output from 1, the 8-bit data constituting the code is divided into upper 4 bits and lower 4 bits, each of which is converted into a hexadecimal number. The unconvertible parameters provided from the conversion units 14 and 15 are converted into hexadecimal values and output to the editing unit 17. The parameters that cannot be converted by the first and second parameter conversion units 14 and 15 mean undefined data that is not defined in the printer, and that there is an error in the data received from the host computer. Is shown.

The symbols converted by the symbol conversion unit 12, the first and second parameter conversion units 14, 15
The converted parameters and the hex values output by the hex value conversion unit 16 are provided to the editing unit 17 in the order of conversion. The analysis data edited by the editing unit is output to the print control unit 18 of the printer. The print control unit 18 outputs the analysis data as print data to the print unit 40 via an interface (not shown), so that the code received by the printer is output by the print unit 40 as shown in FIG. Is printed in an appropriate manner.

The ROM 30 stores a standard code storage section 31 for storing standard codes required for the discrimination by the code type discriminating section, and a pre-allocated code corresponding to each code required for symbol conversion by the symbol converting section. And a symbol storage unit 32 for storing the obtained symbols. The symbol is normally displayed and used for a code represented by a hexadecimal number in a form that makes it easy to understand the contents of the command that the code means by combining alphabetic characters. Table 1 shows a part of a correspondence table between hexadecimal codes, symbols, and names representing their meanings.

[0020]

[Table 1]

The operation of the analyzer having the above configuration will be described with reference to FIG. In the figure, S and the numbers mean steps. When the CPU 10 executes the program in the reception code check mode, when a code is received from the host computer (Yes at S1), first, the reception code R
The received code is stored in the received code storage unit 21 of the AM. Next, the code type discriminating unit 11 compares the received code read from the received code storage unit 21 of the RAM with the standard code stored in the ROM 31 and determines whether the received code is a command or a print code. It is determined (S2).

If the command is a command, the received code is given to the symbol conversion unit 12 and the parameter type determination unit 13. The symbol conversion unit 12 checks whether or not the command is already defined (S3). If the command has been defined (check OK), it is checked whether the command is the start of a command group (S4). If so, a line feed print command is issued (S5), and the process proceeds to step S6. If it is not the start of the command group in S4, the process jumps to S6. And
In S6, the data structure of the given code is checked to see which one of the symbols stored in the symbol storage unit 32 of the ROM matches, and the matched one is taken out as a symbol of the received code, and sent to the editing unit 17. Output (S
7). That is, a print command of the symbol converted from the command is output.

The parameter type determination unit 13 determines whether or not the code provided from the code type determination unit 11 includes a parameter corresponding to the command (S8). 2X type or 3X type,
Alternatively, it is determined whether the type is hexa type by comparing it with the type of the standard parameter of the ROM (S9), and the first parameter converting unit 14 or the second parameter converting unit 1 is determined according to the determination result.
5 and so on. Each parameter converter converts the given code into a parameter in decimal notation according to the content (S10a, S10b, S10c). Subsequently, it is checked whether or not the conversion is successful (S11). When the conversion is successful, the parameter is given to the editing unit 17 (S1).
2) If the conversion is unsuccessful, that is, if the parameter is undefined (the code received from the host computer is incorrect data), a line feed printing command is output at that time (S13), and the parameter is changed. It is provided to the hex conversion unit 16 and converted to hex display (S1
4), which is given to the editing unit 17 (S15).

In the command checking step (S3), if the received code is undefined, that is, if the received code from the host computer is incorrect data, a line feed command is output at that time. (S1
6), the undefined command is supplied from the code type discriminating unit 11 to the hex converting unit 16, which is converted into hex display (S17), and supplied to the editing unit 17 (S1).
8).

Further, if the received code is print data (No at S2), it is checked whether or not it is the beginning of a print code group (S19). If it is the beginning, a line feed command is output (S20). ), And proceed to step S21. If it is not the beginning of the print code group, the process jumps from S19 to S21. In S21, the print code is converted into hexadecimal display data by the hexadecimal conversion unit 16, and this is converted into the edit unit 17
(S22).

The editing unit 17 executes the above steps S5 and S5.
The line feed command given in 7, 13, 15, 16, 18, 20, 22 and the print data printing order are set. Therefore, commands are grouped together, and when a command is changed to a print code, a line feed is performed. Also, even if the command is once determined, if the command is undefined and if the received parameter data is undefined, the print line will be broken at that point. I have.

As described above, the analyzing device sequentially determines whether the code received from the host computer by the printer is a command or a print code, and if the code is a command, converts the code into a predetermined symbol and attaches a parameter. If so, convert it to a decimal parameter according to its type,
In the case of a print code, the print data is converted into a hexadecimal number (hex value), which is easy to confirm the print data, and output to the editing unit 17 as an analysis result. The editing data is printed by the printing unit 40 via the printing control unit 18.

FIG. 2 shows the result of analyzing, outputting, and printing the contents of the received code indicated by the hexa-dump shown in FIG. 1 by the method of the present invention as described above. “SVFU” is a command corresponding to “1B 25” in FIG. 1, and the next “33.34” is “33 34” in FIG.
, Indicating that the data amount of the command is 34, and following the numbers “41,4” enclosed in <> (parentheses).
0,... "Represents data connected to the command. While the number enclosed by <> continues, it means control data.

In FIG. 2, the symbol “SVFU” and the first number “41” to “4” following “33,34” indicating the data amount are shown.
The number up to the number "41" after the repetition of "0" and "42" is the data for setting the position of the vertical tab, and specifies on which line the tab of which channel is to be set in units of one line. .

One symbol (for example, "SVFU" in FIG. 2)
The next command (for example, “PGL” in FIG. 2) is one command. If the command has a parameter, it is indicated by a number after the symbol. For example, "2640" after "PGL". "PGL"
Is a symbol representing a page length designation command, as described in Table 1, and "2640" is a symbol representing 264 pixels.
There is a parameter for setting it to 0. The 2640 parameters are converted by determining the 2 × type parameters of “22 26 24 70” in FIG.

In the same manner, the combination of each symbol and its parameters is printed without line breaks, that is, in one paragraph, until the command for one function is completed. . In FIG.
The commands from "SVFU" to the last symbol "SPI" and its parameter "24" are a group of function commands.

Then, the print data to be printed based on the function is printed with a line feed from the command. In FIG. 2, "31 32 33 34 35" in the second paragraph is
Means alphanumeric.

As described above, in FIG. 2, when the received code is a command, the command is displayed by a symbol which is easy for the operator to read, and when there is a parameter, a decimal number which is easy to understand by a normal numerical idea. , And output and print. The print code is displayed in a familiar hexadecimal number (hex value). Further, the command and the print code are each printed on a new line in a different paragraph. Therefore, the operator can determine where and how the command or print code is located only by looking at FIG. 2 and easily determine what command and parameter are included in which part of the command. This eliminates the hassle of having to prepare a command list as in the prior art, and to check and match each time.

If there is a data error in any of the received codes, conversion to an appropriate symbol or conversion to a parameter cannot be performed, so that a line break occurs in the middle of a paragraph as shown in FIG. Printed in hexadecimal notation. FIG.
In (2), since a command is printed following the seventh and eighth paragraphs, it is immediately known that there is a data error.
In this way, it is possible to instantly find out in which part a data error has occurred.

Here, the correspondence between the description of the above-described embodiment and the description of the claims will be described. The operation of S2 shown in FIG. 6 corresponds to “classification processing” for classifying a received code from the host computer into a control code and a print code based on a predetermined standard code. FIG.
S4, S5, S6, S7, S8, S9,
In the operations of S10a to S10c and S12, the commands included in the received code classified into the control codes by the classification processing are converted into symbols pre-attached to each command and printed, and the command has parameters. In some cases, the parameters are converted into a predetermined decimal number based on the form of each command, and the parameters in decimal notation are printed collectively for each control code accompanying the symbol of the command, and Only when the received code classified as a control code is located at the beginning of a control code group consisting of one or more control codes, a line feed is performed, and then printing corresponding to the control code is performed. Is equivalent. S19 shown in FIG.
The operations of S22 to S22 correspond to "print code processing" in which the received code classified into the print code by the classification processing is printed in hexadecimal notation with a line feed from the end of the control code received prior to the print code. ing. The operation of S16, S17, and S18 shown in FIG. 6 is such that, in the classification process, when a command included in the received code classified as the control code is undefined, a line feed is performed at that time. This corresponds to “undefined command processing” in which the received code indicating the undefined command is printed in hexadecimal notation. In the operation of S11, S13, S14, and S15 shown in FIG. 6, when the parameter is undefined in the control code processing, a line feed is performed at that time to indicate the undefined parameter. This corresponds to “undefined parameter processing” in which the received reception code is printed in hexadecimal notation.

[0036]

As described above, according to the present invention, the reception code from the host computer is printed with the corresponding symbol for the control code, and the parameter accompanying the control code is printed in decimal notation. On the other hand, the print code is printed in hexadecimal notation. In addition, the control code and the print code are printed with line breaks in different paragraphs. Accordingly, the operator can easily understand the contents of the received code only by looking at the print result. If the command or parameter included in the received code classified as the control code is undefined, a line feed operation is performed at that time, and then the undefined received code, Print the code in hexadecimal notation. Therefore, the presence / absence of a data error and the location of the error can be easily found. As a result, there is a great advantage that the operator does not need to perform the analysis using the hexadump and himself / herself does not get tired by the work of checking the received code.

[Brief description of the drawings]

FIG. 1 shows an example of a hexa-dump used for conventional reception code analysis.

FIG. 2 shows output data of an analysis result printed by the method of the present invention.

FIG. 3 is a conceptual diagram illustrating output data of an analysis result of FIG. 2;

FIG. 4 is a conceptual diagram showing an example of the details of a command.

FIG. 5 is a block diagram of an analyzer for implementing the method of the present invention.

FIG. 6 is a flowchart illustrating an operation of the analysis device.

Claims (1)

(57) [Claims] 1. A classification process for classifying a reception code from a host computer into a control code and a print code based on a predetermined standard code, and a command included in the reception code classified as a control code by the classification process. When each command is converted into a symbol attached in advance and printed, and when the command has a parameter, the parameter is converted into a predetermined decimal number based on the form of each command, and 10
A control code group consisting of one or more control codes, in which the parameters in hexadecimal notation are printed collectively for each control code in association with the command symbol, and the received codes classified into the control codes are one or more control codes. Control code processing for performing printing corresponding to the control code after performing a line feed only when positioned at the beginning of the received code, and a reception code classified as a print code by the classification processing is received prior to the print code. A print code process for printing a new line from the end of the control code and printing in hexadecimal notation; and in the classification process, when a command included in the reception code classified into the control code is undefined, at that time, An undefined command process for printing the received code indicating the undefined command in a hexadecimal notation by line feed; In the control code processing, when the parameter is undefined, a line feed is performed at that time and the undefined parameter processing for printing the reception code indicating the undefined parameter in hexadecimal notation is provided. A method for analyzing a received code of a printer, comprising: