JPH05158598A - Data processor - Google Patents

Abstract

PURPOSE:To dispense with initialization by the re-application of a power source and to perform automatic restoration from key lock due to the runaway of a key controller. CONSTITUTION:A data processor 10 is equipped with a CPU 12 which executes every kind of arithmetic processing, and the key controller 11 which converts key input to a key code and outputs it to the CPU 12. The CPU 12 outputs a dummy data request command to the key controller 11 at every constant time, and the key controller 11 outputs dummy data to the CPU 12 by receiving the command, and when no dummy data is sent to the CPU 12, reset is applied from the CPU 12 to the key controller 11 in software fashion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an electronic register (EC
R), a POS system, a data processing device used in a data terminal, and the like, and more particularly, to a data processing device for preventing key lock due to noise such as static electricity.

[0002]

2. Description of the Related Art POS terminal devices are used in department stores, supermarkets,
It is a terminal device that is installed in sales floors such as specialty stores and retail stores and that collects data used for single item management, customer management, sales management, etc. immediately. Generally, it has a register function, a file function for temporarily storing data, and an online function for connecting to a host device. The electronic register (ECR) is
After accumulating (registering) sales data, the sales data is output and the registered amount and number of times is checked or settled to make it useful for sales management. There are a stand-alone electronic register (ECR) that collects data independently, and a master-slave (parent-child) electronic register that performs registration and data collection by separate registration machines. The ECR is connected to a key input section including a keyboard having various data input keys and function keys. The key input section has a numeric key, a transmission key, a closing key, The mode switch MS etc. to specify each mode of "Setting (P)", "Registration (REG)", "Return", "Power off (OFF)", "Inspection (X)", "Settlement (Z)" It is provided.

[0003]

However, in such a conventional data processing apparatus, if noise such as static electricity may be superimposed through a cable or the like, what kind of key is operated next? However, there are cases where the key lock state occurs in which no operation is accepted. Here, when the key lock is caused by noise such as static electricity, it is necessary to perform initialization by re-turning on the power supply to restore the key, which is troublesome. In particular, in a modular type ECR in which a keyboard, a display device, a printing device, etc. are separated from the main body and can be freely laid out, the connection cable becomes long, so that noise is superimposed and key lock easily occurs. It was Then, it is apparent that if the key is locked by noise such as static electricity and the reset is automatically applied, the initialization by the re-turning on of the power is not necessary and the key can be automatically restored. An object of the present invention is to make it possible to automatically restore a key lock without initializing it.

[0004]

The means of the present invention are as follows. The arithmetic processing control unit 1 (see the functional block diagram of FIG. 1, the same applies hereinafter) executes various arithmetic processing based on input contents, and is, for example, a CPU or the like that executes various arithmetic processing according to a predetermined program. The input control unit 2 is
The input control unit outputs the input content to the arithmetic processing control unit 1 and converts the key input on the keyboard into a predetermined key code and outputs the key code to the arithmetic processing control unit 1. In the above configuration, the arithmetic processing control unit 1 outputs the dummy data request command to the input control unit 2 at regular time intervals, and the input control unit 2 outputs the dummy data to the arithmetic processing control unit 1 upon receiving the command. Then, when the dummy data is not sent to the arithmetic processing control unit 1, the input control unit 2 is reset.

[0005]

The operation of the means of the present invention is as follows. Normally, the input contents are output to the arithmetic processing control unit 1 each time there is an input from the input control unit 2. In this state, the arithmetic processing control unit 1 outputs a dummy data request command to the input control unit 2 at regular time intervals, and the input control unit 2 outputs the dummy data to the arithmetic processing control unit 1 upon receiving the command. Then, when the dummy data is not sent to the arithmetic processing control unit 1, the arithmetic processing control unit 1 resets the input control unit 2. Therefore, even if the key lock occurs, it can be automatically restored without performing initialization.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS. 2 to 5 are views showing an embodiment of the data processing device, and this embodiment is an example applied to an electronic register (ECR) as a data processing device. First, the configuration will be described. FIG. 2 is a block diagram showing the overall configuration of the data processing device 10. In FIG. 2, 11 is a key controller that controls key input, 12 is a host CPU that performs ECR calculation processing, and 13 is a power switch that resets the CPU 12 and the key controller 11 when the power is turned on.

The key controller 11 is connected to a keyboard provided with keys for inputting various data, function keys, etc., and when any one of the keys on the keyboard is operated, the key input by key operation is made to correspond to a predetermined value. The key code is converted into a key code and sent to the CPU 12. Also, the above CP
U12 calculates a value required for various operations while exchanging data with the RAM 15 according to a microprogram stored in the ROM 14, and sends a predetermined dummy key code generation command to the key controller 11. I do. In addition, the host CPU 12
R stores a micro program for control that controls various operations of the ECR including a key lock automatic return process.
The OM 14 and the volatile memory capable of writing and reading, and the RA that stores the data used for the calculation and the calculation result
An M15, the key controller 11, a display unit 16 for displaying various data, and a printing unit 17 for printing various data stored in the RAM 15 on journal paper and receipt paper are respectively connected.

The power-on reset output when the power switch 13 is turned on is output to the host CPU 12 and also to the reset terminal of the key controller 11 through the NOR gate 18. In addition to the reset signal input by the power switch 13, the data processing device 10
Then, at the time of automatic recovery from the key lock, a reset signal is input from the reset output terminal of the CPU 12 through the NOR gate 18.

Next, the operation of this embodiment will be described. FIG. 3 is a main flow showing the data processing executed on the host CPU 12 side, and in the figure, reference numeral Sn (n = 1, 2, ...)
Indicates each step of the flow.

When the program starts, it is first determined in step S1 whether or not the power switch 13 is turned on. When the power switch 13 is turned on, power is turned on in step S2 or a timer interrupt process described later (FIG. 4). And proceed to step S6. When the power is turned on in step S1, it is determined in step S3 whether or not there is a key input. If there is a key input, a normal key input process (FIG. 5) based on the key input is performed in step S4, and the process proceeds to step S6. ..
If there is no key input, it is determined in step S5 whether or not the timer interrupt processing is performed, and if it is the timer interrupt processing, step S2 is performed.
Return to. On the other hand, when the timer interrupt time has elapsed, or when the process of step S2 or S4 is completed, it is determined in step S6 whether or not the power switch 13 is off, and if it is power off, the process of this flow ends, If it is not off, the process returns to step S3 to repeat the above process.

FIG. 4 is a flowchart of the power-on or timer interrupt process, which corresponds to the process of step S3.

First, in step S11, the CPU 12 sends a dummy key code generation command to the key controller 11, and in step S12 it is determined whether or not a dummy key code corresponding to the command sent from the key controller 11 has been returned. When the dummy key code is returned from the key controller 11, the key controller 1
It is determined that 1 is normal, and the timer count is reset in step S13, and the processing of this flow ends. CPU1
When the dummy key code generation command is sent from the key controller 11 to the key controller 11 but the dummy key code is not sent from the key controller 11, the process proceeds to step S14, and the CPU 12 outputs RESET to the key controller 11 in step S14. The reset signal is output from and the key controller 11 is reset. Next, in step S15, a dummy key code generation command is sent again to the key controller 11, and step S16
Then, it is determined whether or not the dummy key code corresponding to the command transmitted from the key controller 11 has been returned. That is, after resetting the key controller 11, by sending a dummy key code generation command again to check the return of the dummy key code from the key controller 11, it is determined whether the key controller 11 has returned to normal by resetting. To determine. Here, when the dummy key code is returned from the key controller 11, it is determined that the key controller 11 has returned to the normal state, the timer count is reset in step S17, the processing of this flow ends, and the key controller 11 returns the dummy key code. If the key code is not returned, it means that there is no response to the two command transmissions. Therefore, it is judged that there is something wrong with the key controller 11 or the like, and a system error process (for example, error Is displayed or a notification process is performed by a buzzer or the like), and the process of this flow is finished.

FIG. 5 is a flowchart of the normal key input process, which corresponds to the process of step S4. First, in step S21, the timer count is reset, and in step S22, the process according to the key input is performed and the flow ends.

By executing the above flow, specifically, the following automatic return operation from the key lock is performed.

Normally, the key controller 11 sends a key code to the host CPU 12 as shown in FIG. 2 when the key is depressed. At this time, the host CPU 12 performs normal key input processing, ECR calculation processing, and the like. As part of these processing, the steps of the flow of FIGS. Try to set it again. Then, when this timer interrupt occurs, the host CPU 12 makes the key controller 1
If a command for generating a dummy key code is sent to 1, and if the dummy key code is returned from the key controller 11, it is determined that the key controller 11 is normal. If the dummy key code is not returned, The key controller 11 determines that it is abnormal. At this time,
The host CPU 12 resets the key controller 11 by software, and if a command that returns a dummy key code is returned again, the key controller 11 has returned to normal.

When the key controller 11 normally returns a dummy key code, the timer counter is set again. In this way, by performing a software reset from the CPU 12 side to the key controller 11 side, it is possible to automatically recover from the key locked state immediately when the key lock occurs due to noise such as static electricity.

As described above, the present data processing device 1
Reference numeral 0 denotes a CPU 12 that executes various arithmetic processes and a key controller 11 that converts a key input into a key code and outputs the key code to the CPU 12. The CPU 12 outputs a dummy data request command to the key controller 11 at regular time intervals, Controller 11 C upon receipt of the above command
The dummy data is output to the PU 12, and when the dummy data is not sent to the CPU 12, the CPU 12 resets the key controller 11 by software, so that the key lock is temporarily caused by noise such as static electricity. Even if the error occurs, it can be automatically restored immediately without performing initialization by turning the power on again. Further, it can be realized without adding a hardware configuration, and the cost does not increase. Therefore, the modular type E has a particularly long connecting cable and is easily subject to noise.
It is suitable to be applied to CR.

Although the above embodiment is an example applied to ECR, it can be applied to any device including data processing, and may be applied to a data processing device such as a POS system or a data terminal. ..

[0019]

According to the present invention, even if a key lock occurs, it can be automatically restored without performing initialization. That is, since the software is reset as the arithmetic processing in the arithmetic processing control unit, it is possible to quickly and automatically recover from the key-locked state while eliminating the need for initialization by turning the power on again.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of the present invention.

FIG. 2 is a diagram showing an overall configuration of a data processing device.

FIG. 3 is a flowchart showing data processing of the data processing device.

FIG. 4 is a flowchart showing timer interrupt processing of the data processing device.

FIG. 5 is a flowchart showing a normal key input process of the data processing device.

[Explanation of symbols]

 10 data processor 11 key controller 12 host CPU 13 power switch 18 NOR gate

Claims (1)

[Claims] 1. An arithmetic processing control unit that executes various arithmetic processing based on input contents, and an input control unit that outputs the input contents to the arithmetic processing control unit, wherein the arithmetic processing control unit is the input control unit. To output a dummy data request command at regular time intervals, the input control unit outputs dummy data to the arithmetic processing control unit upon receipt of the command, and the dummy data is not sent to the arithmetic processing control unit. A data processing device, characterized in that the input control unit is reset at the time.