JPH06195271A - Data processor - Google Patents

Abstract

PURPOSE:To suppress the influence of malfunction on account of setting data abnormality to a minimum by calculating the check sum value of setting data which is stored in response to the timing of the turning-on of main power and the timing of fault restoration, comparing it with the check sum value stored in a check sum value storage means, and discriminating the abnormality of setting data when non-coincidence is recognized. CONSTITUTION:When main power is turned on, the check sum values of setting data are calculated for respective setting tables T1, T2, T3... in a setting data storage part 21. The check sum value calculation values for the respective setting tables are compared with the check sum value of the setting table concerned, which is stored in a check sum value storage part 22. Then, it is judged whether the setting table where the both check sum values become non- coincident exists or not. When the setting table where even one check sum value becomes non-coincident exists, the abnormality of setting data stored in the setting table which becomes non-coincident is discriminated.

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 for processing data input from a data input section based on setting data set in a setting data storage section.

[0002]

2. Description of the Related Art As a conventional data processing device of this type,
For example, a POS (point-of-sale information management) terminal has a single-item information setting table in which data such as a product name, a unit price, a link department, and a control flag is preset corresponding to a single-item code attached to each product, and each product It is provided with a setting data storage unit such as a department information setting table in which data such as department names and control flags are preset corresponding to department codes for classifying. When a single product code or a department code of a product is input from a data input unit such as a keyboard or a scanner, information corresponding to the input code is read from the corresponding setting table and data processing is performed.

By the way, a RAM (random access memory) is generally used as a storage unit in which the setting table is formed, and the RAM stabilizes the stored data by a backup battery even when the main power of the data processing device is turned off. It can be held at.

Therefore, the setting work of the data for the setting table is usually limited to the start-up of the system and the change of the setting data. As the data setting method, a method of writing setting data received by down line loading from a host computer online connected via a communication line into a RAM or a setting recorded in a storage medium such as a memory card There is a method of reading data by a reading device such as a card reader and writing the data in the RAM.

[0005]

The bit data stored in the RAM may be garbled ("0" → "1" or "1" → "0") due to, for example, a bug in the application program. However, even in the setting table, the garbled bits may occur and the contents of the setting data may be rewritten.

However, in the conventional data processing apparatus of this type, since the setting work of the data for the setting table was limited to the start-up of the system and the change of the setting data, the contents of the setting data were rewritten. It sometimes operated for a long time in a state.

Therefore, the present invention provides a data processing device capable of promptly detecting an abnormality in the setting data set in the setting data storage section and suppressing the influence of malfunction due to the setting data abnormality to a minimum. Is what you are trying to do.

[0008]

The present invention comprises a data input section for inputting data and a setting data storage section for storing setting data, and the data input section based on the setting data stored in the setting data storage section. In a data processing device for processing input data from, the checksum value storage means for storing the checksum value of the setting data stored in the setting data storage section, and the checksum value storage section stored in the setting data storage section at a predetermined timing. A checksum value calculating means for calculating the checksum value of the setting data, a checksum value comparing means for comparing the checksum value calculated by the calculating means with the checksum value storing means, and comparing the checksum value with the checksum value comparing means. If the checksum values do not match, the error is detected by the abnormality of the setting data stored in the setting data storage section. It is obtained by a physical data abnormality processing unit.

[0009]

In this embodiment having such a configuration, the correct checksum value of the setting data stored in the setting data storage section is stored in advance by the checksum value storage means. In that state, for example, at the timing of turning on the main power supply or the timing of failure recovery, the checksum value of the setting data stored in the setting data storage unit is calculated. Then, the calculated checksum value is compared with the checksum value stored by the checksum value storage means.

Here, when the data set in the setting data storage section has a bit garbled, both checksum values do not match. At this time, since abnormality of the setting data stored in the setting data storage unit is determined and abnormality processing such as abnormality notification is performed, it is possible to prevent the setting data from operating for a long time with abnormality.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the case where the present invention is applied to a POS terminal will be described.

FIG. 1 is a block diagram showing the configuration of the main part of a POS terminal 1 in this embodiment. The POS terminal 1 is connected online with a host computer 3 via a communication line 2.

The POS terminal 1 has a CPU (central processing unit) 4 as a control unit main body, and a ROM (read / write) as a main storage unit controlled by the CPU 4.
Only memory 5 and RAM (random access
A memory 6 is provided, and the CPU 4, ROM 5, and RAM 6 are connected by a bus line 7.

Here, the RAM 6 is designed such that backup power is supplied from the battery 6a, and the stored data can be stably held even when the main power of the POS terminal is turned off.

Further, the POS terminal 1 is provided with a clock circuit 8 for measuring the current date and time, a drawer opening device 10 for inputting a signal from a mode switch 9 and opening a drawer for accommodating cash or the like. An I / O port 11 for outputting a drive signal, a communication interface 12 for controlling data transmission / reception to / from the host computer 3 via a communication line 2, and a key signal corresponding to an input key on a keyboard 13 are taken in. A keyboard controller 14, a display controller 16 that drives and controls a display 15 to display characters and numbers corresponding to display data, a printer controller 18 that drives and controls a printer 17 to print data on receipt paper and journal paper, and a bar code. Bar code data optically read by the scanner 19 There a scanner interface 20 or the like to be inputted, is connected to the CPU4 them through the bus line 7.

The keyboard 13 is provided with keys for inputting a single product code, a department code or the like attached to each product,
A closing key and the like for declaring the end of registration of the purchased product for one customer are provided. Further, a barcode corresponding to a single item code is printed or attached to each product, and the barcode scanner 19 reads and inputs the barcode attached to this product.

The mode switch 9 is a switch for selectively switching various work modes such as "registration", "inspection", "payment", and "setting", and is operated by a key.

Incidentally, the "registration" mode is used to register sales data such as the sales amount of a product for which a single item code or a department code has been input in the sales registration memory formed in the RAM 6 and to perform key input processing for the closing key. In this mode, the printer 17 issues a receipt when the end of transaction for one customer is determined by.

The "inspection" mode is a mode in which data registered for sales in the sales registration memory by "registration" is printed on recording paper by the printer 17 and a report is output.

The "settlement" mode is a mode in which the sales registration memory is cleared by printing the data registered in the sales registration memory by "registration" on the recording paper by the printer 17 and outputting a report.

"Setting" mode means "register", "check",
This is a task of previously setting in the RAM 13 the data required to execute various tasks such as “payment”.

Program data for the CPU 4 to execute a process corresponding to the business mode selected by the mode switch 9 is preset in the ROM 5.

The POS terminal 1 is a RAM
In FIG. 6, as shown in FIG. 2, a single product information setting table T1 in which data such as product name, unit price, link department, and control flag is preset corresponding to the individual product code of each product, department code for classifying each product Various setting tables such as a department information setting table T2 in which data such as department names and control flags are preset in correspondence with the store information, and a store information setting table T3 in which store information such as store names, addresses, and telephone numbers are preset. , And a checksum value storage unit 22 having checksum value storage areas CS1, CS2, CS3, ... Corresponding to various setting tables T1, T2, T3 ,. ing.

Here, for the various setting tables T1, T2, T3, ... In the setting data storage section 21, a down line from the host computer 3 is displayed when the system is started up or when the setting data is changed. The setting data received by loading is written.

That is, when the CPU 4 receives the setting data transmitted from the host computer 3 via the communication interface 12 as shown in FIG. 3, the CPU 4 writes the received data in the corresponding setting table of the setting data storage unit 21.

When the writing of the received data is completed normally, the checksum value of the data stored in the setting table in which the data was written is calculated, and the calculated checksum value is stored in the checksum value storage unit 22. The data is stored in the area corresponding to the corresponding setting table in (3), and this processing ends.

By the way, the checksum value is calculated by sequentially adding byte by byte from the data in the first data area in the corresponding setting table and adding the data in the last data area to the checksum value in the last 4 digits. And

The CPU 4 is programmed so as to execute the processing shown in FIG. 4 in response to the ON operation of a main power source (not shown).

That is, when the main power source is turned on, first,
Each setting table T1, T in the setting data storage unit 21
A checksum value of the setting data is calculated for each of 2, 2, 3, ... (Checksum value calculating means).

Next, the checksum value calculation value for each setting table is compared with the checksum value of the corresponding setting table stored in the checksum value storage unit 22. Then, it is determined whether or not there is a setting table in which both checksum values do not match (checksum value comparison means).

As a result, when it is confirmed that the checksum storage value of the checksum value storage unit 22 corresponding to all the setting tables and the checksum calculation value this time match, it is determined that there is no abnormality in the setting data. Then enter the normal data processing business.

On the other hand, if there is at least one setting table in which both checksum values do not match, the setting data stored in the setting table in which the checksum values do not match is determined to be abnormal. Then, as an abnormal process, a request message for requesting reloading of the corresponding setting data to the host computer 3 is created, and the request message is transmitted to the host computer 3 via the communication interface 12.

In response, the corresponding setting data is downloaded from the host computer 3, and when this is received by the communication interface 12, the CPU 4 writes the received data in the corresponding setting table of the setting data storage unit 21.

When the writing of the received data is completed normally, the checksum value of the data stored in the setting table in which the data was written is calculated, and the calculated checksum value is stored in the checksum value storage unit 22. The data is stored in the area corresponding to the relevant setting table in.

After that, if the printer 17 is drive-controlled to print the journal of the information about the setting table in which the checksum values do not match, a normal data processing operation starts (data abnormality processing means).

In the POS terminal 1 of this embodiment having the above structure, the setting data storage section 2 of the RAM 6 is provided.
In FIG. 1, setting data received by down line loading from the host computer 3 when the system is started up or when the setting data is changed is stored in advance.

Further, various setting tables T1, T2, T
The checksum value calculated at the time of down-line loading of the corresponding setting data for each 3, ... In the checksum value storage areas CS1, SC2, SC3 ,. It is stored.

Information stored in the storage units 21 and 22 is POS.
Even if the main power supply of the terminal 1 is turned off, it is stably held by the backup action of the battery 6a.

In this state, when the main power of the POS terminal 1 is turned on, various setting tables T1, T2, T3,
The checksum value of the data is recalculated each time. Then, the recalculated value and the checksum value of the corresponding setting table stored in the checksum value storage unit 22 are compared,
It is determined whether or not there is a setting table in which both checksum values do not match.

Here, for example, the single item information setting table T1
If garbled bits occur in the setting data of the above and the contents of the setting data are rewritten, the setting table T1
The checksum value recalculation value for the checksum value does not match the checksum value stored in the corresponding area CS1 in the checksum value storage unit 22.

Then, the host computer 3 is requested to reload the setting data to the single item information setting table T1. As a result, when the corresponding setting data is reloaded from the host computer 3, the contents of the single item information setting table T1 are rewritten to normal data. At this time, the fact that there is an abnormality in the data of the single item information setting table T1 is recorded by journal printing.

As described above, according to the present embodiment, even if the data in the setting table is garbled due to a bug in the application program and the contents of the setting data are rewritten, the setting is performed in response to the subsequent power-on operation. Abnormality of data is automatically discriminated and returned to normal data in a relatively short time without the operator being aware of it.

Therefore, it is possible to improve the reliability without operating for a long time as an erroneous operation while the contents of the setting data are rewritten.

In the above embodiment, the timing for recalculating the checksum value is set to the power-on time. However, the timing is not limited to this. For example, a program abnormality or memory abnormality occurs and the abnormality is recovered. When this happens, the checksum value may be automatically recalculated to determine whether the setting data is abnormal. In addition, if the model does not turn off the power for a long time, it may be necessary to periodically recalculate the checksum value every time a preset fixed time of operation is performed to determine whether the setting data is abnormal. Good.

Further, in the above-mentioned embodiment, the reloading of the corresponding setting data was requested at the time of determining the abnormality of the setting data. However, even if the operator is informed by a display or a buzzer that the abnormality has occurred, The effects of the invention can be sufficiently exhibited.

Furthermore, in the above embodiment, the checksum value was calculated when writing the setting data and stored in the checksum value storage unit 22, but the setting data downloaded from the host computer 3 was calculated on the host computer side. A checksum value may be added and loaded, and the checksum value may be stored in the checksum value storage unit 22.

In the above embodiment, the setting data is written in the setting data storage section by downloading from the host computer 3, but the setting data recorded in the storage medium such as a memory card is read by a card reader or the like. It is needless to say that the present invention can be applied to the case of reading by the device and writing to the setting data storage unit.

In addition to the above, it is needless to say that various modifications such as the type of the setting table and the method of calculating the checksum value can be implemented without departing from the scope of the present invention.

[0049]

As described above in detail, according to the present invention, the checksum value of the setting data stored in the setting data storage unit is calculated in response to the timing of turning on the main power supply or the timing of failure recovery. , The checksum value calculation value is compared with the checksum value stored by the checksum value storage means, and if a mismatch is confirmed, it is determined that the setting data is abnormal and the predetermined abnormality processing is performed. A data processing device capable of promptly detecting an abnormality in the setting data set in the setting data storage unit, suppressing the influence of a malfunction due to the setting data abnormality to the minimum, and improving reliability. Can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram of a main part of a POS terminal according to an embodiment of the present invention.

FIG. 2 is a diagram showing a main memory configuration of a RAM in the embodiment.

FIG. 3 is a flowchart showing a setting data receiving process of the CPU in the embodiment.

FIG. 4 is a flowchart showing a power-on process of the CPU in the embodiment.

[Explanation of symbols]

 1 ... POS terminal, 3 ... Host computer, 4 ... CPU, 5 ... ROM, 6 ... RAM, 21 ... Setting data storage section, 22 ... Checksum value storage section.

Claims (1)

[Claims] 1. A data processing device, comprising: a data input unit for inputting data; and a setting data storage unit for storing setting data, and processing input data from the data input unit based on the setting data stored in the setting data storage unit. In the processing device, a checksum value storage unit that stores a checksum value of the setting data stored in the setting data storage unit, and a checksum value of the setting data stored in the setting data storage unit according to a predetermined timing. Checksum value calculating means, a checksum value comparing means for comparing the checksum value calculated by the calculating means with the checksum value storing means, and a checksum value comparing means for comparing the checksum value and the checksum value comparing means. When the mismatch of the values is confirmed, the abnormality of the setting data stored in the setting data storage section is determined and the abnormality processing is performed. The data processing apparatus being characterized in that comprising a data abnormality processing means.