JPH0224184A - Printer - Google Patents

Abstract

PURPOSE:To enable a printing operation mode to be selected by a method wherein when a control code data received from an exterior device is a proper data by referring to a conversion table, the control code data is printed by a mnemonic code and when a violation data, that the control code data is the violation data is indicated. CONSTITUTION:When a data which a reception part 1 receives from an exterior connected device is a final byte of a control code composed of a plurality of bytes, after inputting to a conversion buffer 4, whether its content is an abnormal data or not is judged with a conversion table 5. When abnormal, a corresponding error message is stored in a receiving buffer inside a control part 2, and a content of a conversion buffer 4 is converted to a corresponding character code is as a sexadecimal digit in an order of higher rank 4 bits and lower rank 4 bits for each one byte. Thereafter, it is stored in a receiving buffer. When not abnormal, after converting a mnemonic code corresponding to the content to a corresponding character code as the sexadecimal digit by a conversion table 5, the converted character code is stored in a receiving buffer inside the control part 2, and said content in the control part 2 is printed with a printing part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer device used as an output device in an information processing system.

[Conventional technology]

A printer device has traditionally been an output device used in a computer to output processing results on paper, and its printing function will remain unchanged in the future. However, the data processed by computer systems are characters,
As printing expands to include various media such as images and graphs, the data output by printers also becomes more diverse, and the data used to control printers also become more complex.

As described above, when a printer device that requires complicated control is used in a complicated system, there is a high probability that a problem will occur in the equipment in the system, the communication network, or the software used.

However, conventional printer devices either print according to the received data in the normal operation mode, or only print out the received data in hexadecimal numbers even after converting to the inspection operation mode.

[Problem to be solved by the invention]

In the hexadecimal printing function of the conventional printer device mentioned above,
Since the received data is simply converted into hexadecimal and printed out, if there is a large amount of data in the image data part or external character data part, the result printed in hexadecimal cannot be used by the host computer (host computer, etc.) It takes a lot of time to determine what kind of command was sent. Therefore, even if the printer device prints something different from the expected value, it is necessary to distinguish between whether the received data is incorrect, or whether the received data is correct but incorrect printing occurred due to a malfunction of the printer. The disadvantage was that it was difficult.

[Means to solve the problem]

The printer device of the present invention determines whether control code data received from an external device is legal data or illegal data by referring to a conversion table, and if the control code data is legal data, converts the control code data into a 2-monomonic code. If the data is a violation, an indication indicating that the data is a violation is inserted, and an operation mode in which the control code data is printed is selectable.

〔Example〕 Next, the present invention will be explained with reference to the drawings.

FIG. 1 and FIG. 2 are a block diagram showing the main configuration of an embodiment of the present invention and a flowchart showing an outline of the operation, respectively.

It is determined whether the data received by the receiving unit 1 from an external connection device (not shown) is the last byte of a control code composed of a plurality of bytes. If it is not the final byte, the control unit 2 puts the received data into the conversion buffer 4. In the case of the last byte, after putting the received data into the conversion buffer 4, the contents of the conversion buffer 4 are converted using the conversion table 5.
It is determined whether the contents of the conversion buffer 4 are abnormal data for the printer device of the present invention.

If the contents of the conversion buffer 4 are abnormal, the corresponding error message is stored in a reception buffer (not shown) in the control unit 2, and the contents of the conversion buffer 4 are read byte by byte.
After converting the upper 4 bits and the lower 4 bits into a corresponding character code as a hexadecimal number, the data is stored in a receiving buffer (not shown) in the control unit 2. If there is no abnormality, the content is converted into a corresponding character code as a hexadecimal number in the conversion buffer 4 using the conversion table 5, and then stored in a reception buffer (not shown) in the control unit 2. Thereafter, the printing section 3 prints the contents of a reception buffer (not shown) in the control section 2.

〔Effect of the invention〕

As explained above, the present invention performs printing according to the data by selecting an operation mode, and converts the operation mode as necessary to provide a print result in which the received data is converted into a printer mnemonic code with an error message. You can.

[Brief explanation of the drawing]

1 and 2 are a block diagram and a flowchart, respectively, illustrating an illustrative example of the present invention. 1... Receiving section, 2... Control section, 3...
...Printing section, 4...Conversion buffer, 5.
...Conversion table.

Claims (1)

[Claims] Control code data received from an external device is determined whether it is legal data or illegal data by referring to a conversion table. If the data is legal, the control code data is printed using a mnemonic code, and if it is illegal data, it is printed. A printer device characterized in that it is possible to select an operation mode in which the control code data is printed by inserting a display indicating that the data is a violation.