JPS63199664A - Character processing system for printer - Google Patents

Abstract

PURPOSE:To perform a specific error recovery process for each character, by determining a storing process for each character pattern based on the internal condition of a printer and the state of a predetermined character storing code, at the time of storing each character pattern to a generated address based on each character code read from a master file. CONSTITUTION:A host device 11 reads character information 11a from a character pattern master file 13, and transfers the information to a printer 12. When the character information 11a is received by the printer 12, a code conversion table 14 generates a storing address in a character pattern memory 16 on the basis of a character code 2c, and character patterns 2b for each character are stored. The writing condition signal for the character pattern 2b outputted from the memory 16 is compared with the setting condition of each mask bit of a processing code 2a, and a storing process for each character pattern is determined based on the internal condition of the printer and the state of a predetermined character storing code. Even when abnormal storage is generated during the execution of the storing process for each character pattern, an abnormal condition recovery process can be selected for each character.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a printing device, and more particularly, to printing by transferring a printing pattern and printing control information subordinate to the printing pattern from a host to the printing device in advance. (Prior art) Fig. 4 is a block diagram showing a character processing method of a conventional printer disclosed in, for example, Japanese Patent Application Laid-open No. 59-191643. The host transfers character information 11a consisting of the character pattern read from the character pattern master file 13 and its printing control information to the printer 12. The printer 12 includes a code conversion table 14, a data buffer 159, a character pattern memory 16. Print control section 17. The code conversion table 14 analyzes the character code of the character information 11a sent from the host 11, converts it into an address in the character pattern memory 16, and converts the character code into an address in the character pattern memory 16. The character pattern transferred based on the character pattern and the character modification information subordinate to this character pattern are stored in the data buffer 15.
The data is stored in the character pattern memory 16 via the character pattern memory 16. Also,
The main control section 18 reads a character pattern based on the print data transferred from the host 11 from the character pattern memory 16 and transfers it to the print control section 17 .

Next, the operation will be explained.

The host 11 extracts character information from the character pattern master file 13 and sends it to the printer 12. printer 1
The main control unit 18 of 2 converts the character code of the sent character information into an address of the character pattern memory 16 using the code conversion table 14, and sends the character pattern of the character information, character modification information, etc. via the data buffer 15. It is stored in the memory 16 for character patterns. Note that if an error occurs in the printer 12 while storing character patterns, character modification information, etc. of the character information in the character pattern memory 16, this writing process is canceled.

On the other hand, when printing characters, the main controller 18 transfers the character pattern from the character pattern memory 16 to the print controller 17 in accordance with the print information transferred from the host 11.

At this time, the printing process is executed while referring to the character modification information stored in the character pattern memory 16.

[Problem that the invention seeks to solve]

Since the character processing method of conventional printers is configured as described above, the character pattern memory 16 is actively used only when executing actual printing processing, and the character pattern memory 16 is actively used only when executing the actual printing process. When storing a character pattern in the character pattern memory 16, the printer 1
If an abnormality occurs in the printer 12, it cannot be determined for which character the abnormality recovery measures should be taken, and the predetermined writing process must be re-executed. There was a problem in that it required waiting time and significantly reduced printing efficiency.

This invention was made in order to solve the above problem, and it adds a processing code related to error recovery measures to each character read from a character pattern master file, so that an error occurs in the printer when storing the pattern of each character. An object of the present invention is to obtain a character processing method for a printer that can perform error recovery processing unique to each character.

(Means for Solving the Problems) The character processing method of the printer according to the present invention includes each character code and each character pattern that can be printed in the master file, and corresponds to each character code and each character pattern in a one-to-one manner. A predetermined character storage processing code is added in advance and registered in the master file, and when each character pattern is stored at an address generated based on each character code read from this master file, the internal state of the printer and the predetermined The storage process for each character pattern is determined from the character storage process code state.

(Function) The character processing method of the printer according to the present invention includes each character code and each character pattern that can be printed in a master file, as well as a predetermined character storage processing code that corresponds one-to-one to each character code and each character pattern. Each character pattern is added in advance and registered in the master file, and when storing each character pattern in an address generated based on each character code read from this master file, each character pattern is Determines the storage process for character patterns.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. Fourth
In FIG. 1, the same reference numerals are given to the same parts as in the figure. In FIG. Processing code 2 corresponding to the character storage processing code of
The character pattern memory 1 of the character pattern 2b is based on the mask state of the mask bit of a and the state of the printer 12.
6 is controlled based on the flowchart shown in FIG. 3, which will be described later. 2c is a character code.

FIG. 2 is a block diagram showing the structure of the character processing control section l shown in FIG. 1, and 3 is a register which stores a processing code 2a consisting of, for example, 3 bits. 4 is an AND gate, and each bit 0 of the processing code 2a stored in register 3
2 to 2 and the address error signal, parity error signal, and data error signal indicating the write state signal when character pattern 2b is stored in character pattern memory 16, each bit 0 to 2 is An error processing execution control signal is notified to the main control unit 18 based on the mask state. Note that in this embodiment, processing code 2
Bit 2 of a is a bit to ignore the execution of address error recovery processing, and this bit 2 is set to rlJ (HIGH
In the case of (state), even if an address error signal is output from the character pattern memory 16, the error recovery process is not executed. Furthermore, bit l of the processing code 2a is a bit for ignoring the execution of parity error recovery processing, and when this bit l is rl+ (HIGH state), even if a parity error signal is output from the character pattern memory 16. Do not perform error recovery processing. Bit 0 of processing code 2a is a bit for ignoring the execution of data error recovery processing, and this bit 0 is rlJ (H
In the case of IGH (S), even if a data error signal is output from the character pattern memory 16, the error recovery process is not executed.

Next, the operation will be explained.

The host 11 extracts character information 11a from the character pattern master file 13 and starts transferring it to the printer 12. When the printer 12 receives and receives character information 11a, the code conversion table 14 generates a storage address for the character pattern memory 16 based on the character code 2c that constitutes one character information 11a, and the address is temporarily stored in the data buffer 15 together with the character pattern 2b. , the character pattern 2b of each character is stored based on the generated storage address.

In parallel with this, the processing code 2a of the character information 11a is written into the register 3. Therefore, when the character pattern 2b corresponding to the 5-character code 2C is written to the character pattern memory 16, the writing status signal of the character pattern 2b output from the 1-character pattern memory 16 and the setting of each mask bit of the processing code 2a For example, when bit 2 of processing code 2a is masked in advance to rlJ and an address error signal is output from character pattern memory 16, AND gate 4
From then on, the address error signal is ignored, and the error processing execution control signal for executing address error recovery processing is not output to the main control unit 18, and the process shifts to writing the character pattern 2b of the primary character. On the other hand, character pattern 2
The writing state signal of b is compared with the setting state of each mask bit of the processing code 2a, and if, for example, bit l of the processing code 2a is masked to "1" in advance, the parity error signal is detected as the character pattern memory 16. If the parity error signal is output from The process moves on to writing the character pattern 2b. In addition, the writing status signal of character pattern 2b is compared with the setting status of each mask bit of processing code 2a, and if, for example, bit 0 of processing code 2a is masked in advance to rlJ, the data error signal for the character pattern is When the data error signal is output from the memory 16, the data error signal is ignored by the AND gate 4, and the error processing execution control signal for executing the data error recovery processing is not output to the main control unit 18, but the next signal is output from the AND gate 4. The process moves on to the writing process of the character pattern 2b. In this way, if an error occurs in the printer 12 when storing the character pattern 2b of each character, error handling control specific to each character can be executed. Even if an error occurs during this process, you can continue storing other character patterns.

Next, the character pattern storage processing operation according to the present invention will be explained with reference to the flowchart shown in FIG.

FIG. 3 is a flowchart illustrating the character pattern storage processing operation according to the present invention. In addition, 5T(1) to 5T
(26) indicates each step.

The host 11 waits for the printer 12 to become online (step 5T(1)), and after confirming that the printer 12 is online, the host 11 waits for the printer 12 to become online.
The host 11 waits for a character pattern transfer request to be output from the main control unit 18 of the computer (step 5T(2)), and when the transfer request is output, the host 11 transfers the character pattern master file 1 to the character pattern master file 1.
3 to read the character information 11a of each character (step 5T(3)), and start transferring the character information 11a to the printer 12 (step 5T(4)). Next, the code conversion table 14 of the printer 12 converts the address that is the storage address of the character into character code 2C.
(Step 5T(5))
, a processing code 2a, that is, a mask bit indicating whether error processing is to be executed or not, is stored for each character in the register 3 of the character processing control unit 1 (step 5T(6)). Next, character pattern 2 is temporarily stored in data buffer 15 based on the address generated by code conversion table 14.
b into the character pattern memory 16 (step 5)
T(7)). Next, refer to the write state signal of this character pattern 2b and the state of each mask bit stored in the register 3 (Step 5T (8)), and determine whether the address error signal is in the rHI GHJ state (Step 5T (9)). ), if NO, step 5T (12)
Proceed to the following, and if YES, bit 2 of the mask bit is r
) (Step 5 to determine whether the state is IGHJ)
T(10)), YES If S, address error recovery processing is not executed and the process proceeds to step 5T(11)), step 5T(14) or later; if No, error processing execution control signal for executing address error recovery processing is sent. is output to the main control unit 18 (step 5T(12)), waits for the end of the error recovery process (step 5T(13)), and waits for the end of the error recovery process, then the parity error signal becomes rH.
Step 5T (to determine whether it is in the IGHJ state)
14)) If No, proceed to step 5T (17) or later; if YES, bit 1 of the mask bit is rHIG.
Step 5T (15
)), YES If S, parity error recovery processing is not executed and step 5T (16)), step 5T (1
If the answer is No, output an error processing execution control signal to the main control unit 18 to execute the parity error recovery process (step 5T (17)), wait for the end of the error recovery process (step 5T (18)) , after waiting for the end of the error recovery process, the data error signal is rHI GHJ
Step 5T (19))
, If No, proceed to step 5T (22) and later, Y
If ES, bit 0 of the mask bit determines whether it is in the rHIGHJ state. Step 5T (2G), YE
If S, do not execute data error recovery processing and step 5
T(21)), proceed to step 5T(24) and onwards, and N
If O, an error processing execution control signal for executing data error recovery processing is output to the main control unit 18 in step 5T (
22)) Wait for the error recovery process to finish in step 5.
T (23)), after waiting for the end of the error recovery process, wait for input of printer data (Step 5T (24))
, step 5T (25)) of reading character patterns 2b corresponding to each character code 2C of the input printer data from the character pattern memory 16; print control section 1;
7, step 5T (26)), and the control ends.

In the above embodiment, a case has been described in which whether or not to execute error processing is determined based on the written state of the mask bit of processing code 2a. It may be configured to continue processing. Furthermore, in the above embodiment, processing code 2a is referred to as an error, but
As long as the information is used when storing the character pattern 2b, it may be used for checking the character pattern storage counter in the character pattern memory 16 when the number of bytes of the character pattern 2b is different, for example.

(Effects of the Invention) As described above, according to the present invention, each character code and each character pattern that can be printed in a master file, as well as a predetermined character storage that corresponds one-to-one to each character code and each character pattern, are stored. A processing code is added in advance and registered in the master file, and when each character pattern is stored at an address generated based on each character code read from this master file, the printer's internal state and the predetermined character storage processing code are stored. Since the configuration is configured to determine the storage process for each character pattern based on the status, even if a storage error occurs while storing each character pattern in the printer, the error recovery process can be selected for each character. This provides an excellent effect of efficiently storing character patterns by selecting execution of error recovery processing depending on the importance of characters, for example, JIS 1st level and 2nd level.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the character processing method of a printer according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of the character processing control section shown in FIG. 1, and FIG. A flowchart explaining the pattern storage processing operation, and FIG. 4 is a block diagram showing the character processing method of a conventional printer. In the figure, l is a character processing control unit, 2a is a processing code,
2b is a character pattern, 2c is a character code, 3 is a register, 4 is an AND gate, 11 is a host, 12 is a printer,
13 is a character pattern master file, 14 is a code conversion table, 15 is a data buffer, 16 is a character pattern memory, 17 is a print control section, and 18 is a main control section. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. (2 people outside)

Claims (2)

[Claims] (1) In a character processing method of a printer in which each printable character code and each character pattern stored in a master file is stored in a pattern memory within the printer before printing starts and the printing process is executed, the master file is Along with each printable character code and each character pattern, a predetermined character storage processing code that corresponds one-to-one to each character code and each character pattern is added in advance and registered in a master file, and is read from this master file. When storing each character pattern at an address generated based on each character code, a storage process for each character pattern is determined from a state within the printer and a state of the predetermined character storage process code. The printer's character processing method. (2) A character processing method for a printer according to claim (1), wherein the character storage processing code is composed of storage error processing information.