JPH04257995A - Data processor - Google Patents

Abstract

PURPOSE:To reduce the capacity of a storage part by compressing an unworked data, which is prepared according to a data format decided in advance, and storing the data in the storage part. CONSTITUTION:Each time the registration finishing of sales registration or the like is executed by operating a keyboard 6, a transaction data is prepared according to the data format, which can be processed by a host computer, and stored in a transaction file 2b, and a transmission request from the host computer is waited. In this case, it is judged whether the header data of a large classification code, middle classification code and small classification code corresponding to registered contents are set to a parameter table 2C or not and when the data are set, a parameter data corresponding to the data is compressed in place of the header data.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device such as a POS (point of sale) system.

0002

[Prior Art] For example, a POS system includes a plurality of POS terminals each having a function of registering sales products, and each POS
It is configured by connecting via a transmission line to a host computer that has the function of collecting and processing information regarding sales products registered at the terminal. Based on the registration information, each POS terminal creates raw data including the registration amount, number of registration points, etc. according to a data format that can be processed by the host computer, and stores it in a storage unit such as RAM (random access memory). Then, in response to a transmission request from the host computer, the raw data in the storage section is transmitted all at once via the transmission line.

In this case, conventionally, when raw data is stored in a storage unit, raw data created according to a predetermined data format is stored as is.

0004

[Problem to be solved by the invention] However, the above raw data has a fixed length regardless of the registered content, and furthermore, the numerical data such as the registered amount and the number of registered points are formatted according to the maximum value that can occur. Therefore, the capacity of the storage unit for storing raw data had to be large.

[0005] Therefore, the present invention aims to provide a data processing device that can compress raw data created according to a predetermined data format and store it in a storage unit, thereby reducing the capacity of the storage unit. It is something.

[0006]

[Means for Solving the Problems] The present invention is connected to an external device having a data processing function via a transmission line, and based on input information from an input section, raw data is processed according to a data format that can be processed by the external device. A data processing apparatus that creates raw data, stores it in a storage section, and transmits the raw data stored in the storage section to an external device via a transmission line at a timely manner, is characterized by having the following configuration.

[0007] In other words, the invention corresponding to claim 1 provides that, when raw data is stored in the storage unit, numerical data whose number of bytes is fixed depending on the data format included in the raw data is stored consecutively from the most significant digit. a data compression means for compressing the raw data by deleting "0", a data storage control means for storing the raw data compressed by the compression means in a storage section, and a data storage control means for storing the raw data in the storage section to an external device. When transmitting, the data storage control means reads out the raw data stored in the storage unit, and the upper digits of the numerical data included in the raw data read by the reading means are fixed by the data format. data decompression means for expanding the raw data by adding "0" until it reaches the number of bytes; and data transmission control means for transmitting the raw data decompressed by the data decompression means to an external device via a transmission line. Equipped with.

The invention corresponding to claim 2 provides data for compressing raw data by parameterizing header data corresponding to the content of input information included in the raw data when storing raw data in a storage unit. a compression means; a data storage control means for storing raw data compressed by the compression means in a storage unit; a data reading means for reading the raw data read by the reading means; a data decompression means for converting parameters included in the raw data read by the reading means into corresponding header data and decompressing the raw data; and a data decompression means for decompressing the raw data. and data transmission control means for transmitting the expanded raw data to an external device via a transmission line. In the invention corresponding to claim 3, in the invention corresponding to claim 1, data decompression means is provided in the external device, and raw data is transmitted in a compressed state. The invention corresponding to claim 4 is:
In the invention corresponding to claim 2, data decompression means is provided in the external device, and raw data is transmitted in a compressed state.

[0009]

[Operation] With the present invention configured as described above, when numerical data is included in raw data created according to a data format that can be processed by an external device, continuous "0" from the most significant digit of the numerical data is " by deleting the raw data, the raw data is compressed and stored in the storage unit in the compressed state.

[0010] Furthermore, if the raw data includes header data corresponding to the content of the input information, the raw data is compressed by parameterizing the header data, and stored in the storage unit in the compressed state. Stored.

[0011] In any case, the compressed raw data is decompressed to fit a predetermined data format and processed by the external device before or after being transmitted to the external device.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a POS terminal will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a POS terminal in this embodiment. In the figure, reference numeral 1 denotes a POS control section as a main body of the control section, which is constituted by a microcomputer. The POS control unit 1 is a RAM
Controls writing and reading of data to and from 2. In addition, there is a clock circuit 3 that measures the date and time, a communication interface 4 that controls the transmission and reception of data with the host computer (external device) that is the host model, and "registration" and "inspection".
A mode switch 5 for switching various business modes such as "Settings", a keyboard 6 equipped with various keys for inputting information related to the registration of sales products, etc., a keyboard 6 for displaying the sales amount of products, total amount, etc. A display 7, a printer 8 for printing and issuing receipts, a drawer 9 for storing cash, etc. are connected.

The RAM 2 includes various memory areas such as a transaction file 2b and a parameter table 2c, as well as a registration work memory 2a for temporarily storing the registration result of one registration obtained from the registration information entered by key. is formed.

The transaction file 2b sequentially stores raw data, so-called transaction data, created according to a data format that can be processed by the host computer based on key-input registration information.

FIG. 2 shows an example of the data format of transaction data in this embodiment. Figure 2(a) is 1
This is one text of transaction data when product sales are registered in a department, and consists of a total of 16 bytes.
The first 1 byte is a major classification code indicating the major classification (product registration) of the registered content, and the next 2 bytes are the middle classification (product registration) of the registered content.
The next 1 byte is the status indicating that the next code is a department code, the next 2 bytes are the department code of the registered product, and the next 1 byte is the status code indicating that the next code is a department code. The first 5 bytes are the sales amount of the registered product, and the last 5 bytes are the number of sales of the registered product. Also, Figure 2(b) is one text of transaction data when the product registration closing operation for one transaction is performed, and it also consists of a total of 16 bytes, and the first byte is used to classify the registration contents (registration closing). The next two bytes are the major classification code indicating the registered content (sales registration closing,
The next 1 byte is the status indicating that the next code is the minor classification code, and the next 2 bytes are the minor classification of the registration contents (current tax closing, credit card closing, etc.). The next 5 bytes are the total price of the registered product, and the last 5 bytes are the total score of the registered product.

[0017] The code "S" in the least significant digit of the numerical data regarding the amount and points is a sign code indicating the sign of the numerical data, and "S" indicates positive. Further, the major classification code, medium classification code, and minor classification code are collectively referred to as header data.

As shown in FIG. 3, the parameter table 2c stores a plurality of patterns of header data constituting the transaction data, corresponding to several types of parameters each consisting of one byte. Here, as shown in FIG. 2(a), for items that do not include a minor classification code, the minor classification code is stored as all "0".

[0019] When the POS control unit 1 receives information regarding registration from the keyboard 6 while the mode switch 5 selects the "registration" mode,
Memory processing for the registration work memory 2a, printing processing by the printer 8, display processing by the display 7, etc. are executed. Furthermore, the transaction data creation process shown in FIG. 4 is executed. That is, each code of major classification, medium classification, and minor classification that corresponds to the registered content this time, so-called header data corresponding to the content of registered information, is determined and the memory for transaction data editing in RAM2 (hereinafter abbreviated as editing memory) is determined. ). However, if this header data is set in the parameter table 2c, the transaction data is compressed by setting parameters corresponding to the combination in the editing memory (data compression means). Next, the registration results stored in the registration work memory 2a are sequentially retrieved item by item, edited in accordance with the data format, and set in the editing memory. However, if the retrieved item data is numeric data that includes a sign code, the transaction data is compressed by deleting and setting consecutive "0's" in bytes starting from the most significant digit (
data compression method). In this way, the registration work memory 2a
When all the data for each item in the text has been extracted, an EOT code, which is an identification code indicating the end of one text, is set in the editing memory. Then, the contents of the editing memory are transferred to the transaction file 2b (data storage control means), and this process is ended.

On the other hand, when the POS control unit 1 receives a transaction data collection request from the host computer, it executes the transaction data transmission process shown in FIG. That is, first, the data of the first item is read from the transaction file 2b (data reading means). If the read data is a parameter, convert the parameter into the corresponding header data (major classification, middle classification, and minor classification codes) based on the setting contents of the parameter table 2c, and set it in the editing memory. The transaction data is expanded by (data expansion means). On the other hand, item data other than parameters are directly set in the editing memory. However, in the case of numerical data with a sign, the transaction data is expanded by adding and setting "0" to the upper digits until the number of bytes fixed by the data format is reached (data expansion means). In this way, data in the transaction file 2b is read out sequentially, and E
When the OT code is read, it is the end of one text, so after editing the contents of the editing memory into transaction data that can be processed by the host computer according to a preset data format, it is sent to the host computer via the communication interface 4. (data transmission control means). Once the above processing has been performed on all the data in the transaction file 2b, the batch transmission of the transaction data has been completed, and this processing ends.

[0021] In this embodiment configured as described above, by key operations on the keyboard 6, product registration such as product sales registration, return registration, discount registration, etc., and registration of cash closing, credit account closing, etc. of one registration can be performed. Every time a closing is performed, transaction data is created according to a data format that can be processed by the host computer. Then, the created transaction data is sequentially stored in the transaction file 2b and waits for a transmission request from the host computer.

When storing transaction data in the transaction file 2b, the data is compressed by the following method. That is, it is determined whether the header data of the major classification code, medium classification code, and minor classification code (in the case of product registration, there is no minor classification code) corresponding to the registered content is set in the parameter table 2c, and whether or not the header data is set. If there is, the parameter corresponding to that data is replaced with header data and compressed. Further, consecutive "0"s from the most significant digit of the numerical data to which the sign code is added are deleted and compressed.

[0023] Now, if the product sales registration and registration cash closing operation for a customer who purchased one item with department code [01] and a unit price of 100 yen and offered to pay in cash is performed from the keyboard 6, the product sales Transaction data for registration is shown in FIG. 2(a), and transaction data for cash closing is shown in FIG. 2(b).

Here, the header data (major classification code [21], medium classification code [0301]) of the transaction data in FIG. 2(a) is the parameter table 2c in FIG.
is replaced with parameter [01] in . In addition, the amount data [0000001
00S], consecutive "0"s are deleted from the most significant digit, and [
100S], and the score data [000000001S
] becomes [1S]. As a result, the same transaction data consisting of 16 bytes becomes 8 bytes as shown in Figure 6(a).
It is compressed into bytes and stored in the transaction file 2c.

On the other hand, the header data (major classification code [29], medium classification code [0607], minor classification code [0081]) of the transaction data in FIG. 2(b) is stored in parameter [7A] in the parameter table 2c. Replaced. Further, the amount data [000000100S] of the same transaction data becomes [100S], and the score data [000000001S] becomes [1S]. As a result, the same transaction data consisting of 16 bytes is compressed to 6 bytes as shown in FIG. 6(b) and stored in the transaction file 2c.

In this way, since transaction data is compressed from a predetermined data format and stored in the transaction file 2c, the memory capacity can be significantly reduced compared to the case where the transaction data is stored in the same data format. As a result, the RAM 2 can be used effectively.

Furthermore, when a transaction data transmission request is accepted from the host computer, the transaction data stored in a compressed state in the transaction file 2c is sequentially read out, and for the parameters, refer to the above parameter table 2c. The data is then replaced with the corresponding header data, and for numerical data, "0" is added to the upper digits until the number of bytes fixed by the data format is reached, and the data is expanded. As a result, transaction data is edited according to a data format that can be processed by the host computer, and is sent to the host computer. Therefore, since transaction data is sent to the host computer in the same format as before, the transaction data can be processed without requiring any special changes.

In the above embodiment, the transaction data is compressed by parameterizing the header data corresponding to the registered contents and deleting consecutive "0"s from the most significant digit of the numerical data to which the sign code is added. However, POS equipped with either one of the data compression means
Even in a terminal, the memory capacity of the transaction file 2c can be reduced compared to the conventional one, and the effects of the present invention can be achieved.

Furthermore, in the above embodiment, the compressed transaction data was decompressed on the POS terminal side and then sent to the host computer, but the compressed transaction data is sent as is to the host computer and decompressed on the host computer side. Good too. In this case, in the transaction data transmission process of the POS control unit 1, upon receiving a transaction data transmission request from the host computer as shown in FIG. It will be sent to the host computer via interface 4. On the other hand, the host computer includes the parameter table 2c in its memory. Additionally, transaction data reception processing shown in FIG. 8 is added. That is, the received transaction data is analyzed, and if a parameter is included, the corresponding header data (major classification, middle classification, and minor classification codes) is read out from the parameter table 2c, and the parameter is converted into header data. . In addition, if numerical data is included, it is determined whether the number of bytes of the numerical data matches the number of bytes fixed by the data format, and if it does not match, the upper digits of the numerical data are ” to match the fixed number of bytes. Once the received transaction data has been expanded to fit a predetermined data format, the transaction data is stored in the storage unit for processing. It goes without saying that various other modifications can be made without departing from the gist of the present invention.

[0030]

[Effects of the Invention] As detailed above, according to the present invention, raw data created according to a predetermined data format can be compressed and stored in the storage unit, thereby reducing the capacity of the storage unit. It is possible to provide a data processing device that obtains data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a POS terminal in an embodiment of the present invention.

FIG. 2 is a diagram showing a data format of transaction data in the same embodiment.

FIG. 3 is a diagram showing the configuration of a parameter table in the same embodiment.

FIG. 4 is a flowchart showing the transaction data creation process of the POS control unit in the same embodiment.

FIG. 5 is a flowchart showing transaction data transmission processing of the POS control unit in the same embodiment.

FIG. 6 is a diagram showing a data format of transaction data after compression in the same embodiment.

FIG. 7 is a flowchart showing transaction data transmission processing of a POS control unit in another embodiment of the present invention.

FIG. 8 is a flowchart showing transaction data reception processing of the host computer in the same embodiment.

[Explanation of symbols]

1...POS control unit, 2...RAM, 4...communication interface, 6...keyboard, 2a...work memory for registration, 2b
...Transaction file, 2c...Parameter table.

Claims (4)

[Claims] Claim 1: Connected to an external device having a data processing function via a transmission line, raw data is created according to a data format that can be processed by the external device based on input information from an input section, and is stored in a storage section. In a data processing device that transmits the raw data stored in the storage unit to an external device via the transmission line in a timely manner, when storing the raw data in the storage unit, the raw data contained in the raw data is stored in the storage unit. data compression means for compressing raw data by deleting consecutive "0" from the most significant digit of numerical data whose number of bytes is fixed by the data format; and the storage of the raw data compressed by the compression means. a data storage control means for storing the raw data in the storage unit; and a data reading unit for reading out the raw data stored in the storage unit by the data storage control unit when transmitting the raw data in the storage unit to the external device. , a data expansion means for expanding the raw data by adding "0" to the upper digits of numerical data included in the raw data read by the reading means until the number of bytes fixed by the data format is reached; A data processing device comprising: data transmission control means for transmitting the raw data expanded by the data expansion means to an external device via the transmission line. 2. Connected to an external device having a data processing function via a transmission line, raw data is created according to a data format that can be processed by the external device based on input information from an input section, and is stored in a storage section. In a data processing device that transmits the raw data stored in the storage unit to an external device via the transmission line in a timely manner, when storing the raw data in the storage unit, the data included in the raw data is stored in the storage unit. a data compression means for compressing raw data by parameterizing header data corresponding to the content of the input information; a data storage control means for storing the raw data compressed by the compression means in the storage unit; a data reading means for reading raw data stored in the storage section by the data storage control means when transmitting raw data in the unit to the external device; data decompression means for converting the parameters to corresponding header data and decompressing the raw data; and data transmission control means for transmitting the raw data decompressed by the data decompression means to an external device via the transmission line. A data processing device comprising: Claim 3: An external device having a data processing function;
It is connected to this external device via a transmission line, creates raw data according to a data format that can be processed by the external device based on the input information from the input section, and stores it in the storage section. In a data processing device comprising a terminal device that sends raw data to an external device via the transmission line in a timely manner, the terminal device stores information contained in the raw data in the storage unit. data compression means for compressing raw data by deleting consecutive "0" from the most significant digit of numerical data whose number of bytes is fixed according to the data format; data storage control means for storing the raw data in the storage section; and data reading means for reading out the raw data stored in the storage section by the data storage control means when transmitting the raw data in the storage section to the external device. and data transmission control means for transmitting the raw data read by the reading means to an external device via the transmission line, the external device comprising:
Data decompression means is provided for expanding the raw data by adding "0" to the upper digits of numerical data included in the raw data received via the transmission line until the number of bytes fixed by the data format is reached. A data processing device characterized by: Claim 4: An external device having a data processing function;
It is connected to this external device via a transmission line, creates raw data according to a data format that can be processed by the external device based on the input information from the input section, and stores it in the storage section. In a data processing device comprising a terminal device that sends raw data to an external device via the transmission line in a timely manner, the terminal device stores information contained in the raw data in the storage unit. data compression means for compressing raw data by parameterizing header data corresponding to the content of the input information;
data storage control means for storing the raw data compressed by the compression means in the storage unit; The external device includes a data reading means for reading the stored raw data, and a data transmission control means for transmitting the raw data read by the reading means to an external device via the transmission line. 1. A data processing device comprising data decompression means for converting parameters included in raw data received via a transmission line into corresponding header data and decompressing the raw data.