JP2000207622A - Initialization processing device for vending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an initialization processing device for vending machine which can change an initialization program while surely performing normal initialization processing. SOLUTION: A first initialization program 18a to perform initialization processing of vending machine is stored in an auxiliary ROM 18 incorporated in a CPU 11, and a second initialization program 12a to perform initialization processing of the vending machine is stored in a main ROM 12, and the first initialization programs 18a or the second initialization program 12a is selected by a switching means 15a. Thus, the improved initialization program 12a can be executed to perform better initialization processing; and even if the initialization program 12a in the main ROM 12 is rewritten, the initialization program in the auxiliary ROM 18 is executed to perform initialization processing without hindrance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vending machine initialization processing apparatus for normally starting up a vending machine at power-on or reset.

[0002]

2. Description of the Related Art In a vending machine, an initialization process (start-up process) is performed in order to normally start up the vending machine when the power is turned on or at the time of resetting. Various control programs are read.

FIG. 5 is a block diagram showing a schematic control circuit configuration of a vending machine. 1 is a CPU, 2 is a main ROM which is electrically rewritable and stores a control program 2a for the vending machine, etc. 3 is a main RAM for storing various data, 4 is a clock section, 5 is a data bus,
Reference numeral 8 denotes a chip selection circuit for selecting a chip that accesses a memory space area of the CPU 1.

The CPU 1 has an auxiliary ROM 6 and an auxiliary RAM 7 in addition to the main ROM 2 and the RAM 3. The auxiliary ROM 6 is rewritable and difficult to replace. The auxiliary ROM 6 stores an initialization program 6a for performing a startup process of a vending machine.

[0005]

However, according to the conventional vending machine, there is a bug in the initialization program 6a stored in the auxiliary ROM 6, or the initialization program 6a is stored based on the specifications of the vending machine. Even when it is desired to change the specifications, these improvement operations could not be performed because the initialization program 6a is stored in the auxiliary ROM 6.

As a countermeasure against this, as shown in FIG. 6, the storage area of the main ROM 2 is divided into a write target area and a fixed area, and the areas are switched and used by software. It is conceivable to store the vending machine initialization program 2b and to store the vending machine control program 2a in the write target area. According to this configuration, since the initialization program 2b is stored in the main ROM 2, the initialization program 2b can be changed.

However, according to this configuration, when the CPU 1 goes out of control due to noise or the like, or an erroneous signal is input from the outside, the initialization program 2b of the main ROM 2 is rewritten and normal initialization processing is performed. This may not be done.

The present invention solves the above-mentioned problems, and provides an initialization processing apparatus for a vending machine that can perform a good initialization processing while reliably performing a normal initialization processing. Things.

[0009]

According to a first aspect of the present invention, there is provided a vending machine initialization processing apparatus for performing a vending machine initialization process. Is stored in the auxiliary ROM, and a second initialization program for initializing the vending machine is stored in the main RO.
M, which is configured to be stored or storable, and provided with switching means for selecting either the first initialization program of the auxiliary ROM or the second initialization program of the main ROM.

With this configuration, when it is desired to change the initialization program, the changed initialization program is transferred to the main R
The program is also stored in the OM, and the main ROM initialization program is selected and used. Also, the CPU may run away due to noise, etc., or an incorrect signal may be input from the outside,
When the initialization program of the main ROM is rewritten and normal initialization processing cannot be performed, the initialization program of the auxiliary ROM is selected and used.

According to a second aspect of the present invention, there is provided an initialization processing apparatus for a vending machine according to the first aspect, wherein a plurality of areas in a memory space of a CPU are used for a main ROM. Similarly, the main ROM is allocated to a plurality of areas of the memory space of the CPU so that it can be accessed, and the start-up area of the memory space automatically accessed by the CPU when the vending machine starts up. The memory area of the main ROM is configured to overlap.

In this configuration, the switching means selects either the initialization program of the auxiliary ROM or the initialization program of the main ROM in the startup area of the memory space of the CPU so that the initialization program is selected. Can be used without any problem.

According to a third aspect of the present invention, there is provided an initialization processing device for a vending machine, wherein the auxiliary ROM is a built-in ROM built in a CPU. There is something.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the control unit of the vending machine includes a CPU 11 and a main ROM 12 which is electrically rewritable and stores a control program 12a for the vending machine.
A main RAM 13 in which various data are stored;
A clock section 14, a chip selection circuit 15 having a switching circuit 15a including an auxiliary ROM inhibition circuit as shown in FIG.
These CPU 11, main ROM 12, main RAM
A data bus 16 is provided for directly connecting the clock 13, the clock section 14, and the chip selection circuit 15. CPU1
1 is provided with an auxiliary RAM 17 and an auxiliary ROM 18 which is masked and cannot be rewritten and is difficult to replace.

The auxiliary ROM 18 of the CPU 11 has an initialization program (first initialization program) 18a for normally starting up the vending machine at power-on or reset.
Is stored. The main ROM 12 can store an initialization program (second initialization program) 12b improved by removing bugs or changing specifications based on the specifications of the vending machine.

Further, according to the circuit configuration of the chip selection circuit 15, as shown in FIG.
2, the main ROM 12, the main ram 13, and the clock unit 14 are allocated to two areas of the memory space of the CPU 11 so that the main RAM 13 and the clock unit 14 can be similarly accessed. Further, a start-up area (reset address number 0000) of a memory space automatically accessed by the CPU 11 when the vending machine starts up.
At address 0 (hexadecimal), the memory area of the auxiliary ROM 18 and the memory area of the main ROM 12 overlap.

Specifically, the main ROM 12 stores 0 to 20.
The addresses are assigned to addresses 00 and 8000 to A000, and the auxiliary ROM 18 is assigned to addresses 0 to FFF. The initialization program 18a of the auxiliary ROM 18 includes:
A start-up process and a program for accessing the address 8000 thereafter are stored.

At the beginning of vending machine delivery, the switching circuit 15
The auxiliary ROM prohibition signal of a is turned off, the auxiliary ROM 18 is selected when the vending machine starts up, and the initialization program 18a of the auxiliary ROM 18 is executed. FIG. 4A schematically shows a map of the memory space at this time.

Thereafter, it is found that the initialization program 18a stored in the auxiliary ROM 18 has a bug, or the initialization program 18a is stored based on the specifications of the vending machine.
If it is desired to change the specification a, the improved initialization program 12 which has removed the bug or changed the specification
main ROM 12 so that a program including
Rewrite the data of Then, the auxiliary ROM inhibition signal of the switching circuit 15a is changed to ON. As a result, when the vending machine is started, the main ROM 12 is accessed without accessing the auxiliary ROM 18 and the main ROM 12 is accessed.
The improved initialization program 12b of M12 is executed. FIG. 4B schematically shows a map of the memory space at this time.

As a result, the improved initialization program 12b can be executed, and a better initialization process can be performed.

When the CPU 11 goes out of control due to noise or the like, or an erroneous signal is input from the outside, the initialization program 12b of the main ROM 12 is rewritten and normal initialization processing cannot be performed. By returning the auxiliary ROM inhibition signal of the switching circuit 15a to OFF, the initialization program 18a of the auxiliary ROM 18 is executed, and the initialization processing can be performed without any trouble.

The main ROM 12 is allocated to a plurality of areas in the memory space of the CPU 11, and a start-up area of the memory space automatically accessed by the CPU 11 when the vending machine starts up. Since the memory area of the ROM 12 is configured to overlap the memory area of the ROM 12,
The start-up process can be changed only by providing the switching circuit 15a including the inhibition circuit.

Although FIG. 1 shows a case where a switching circuit 15a is additionally provided to the chip selection circuit 15 for easy understanding, the auxiliary ROM 18 is actually stored in the ROM built in the one-chip CPU 11. When assigned, the CPU 11 generally has a built-in ROM prohibition input circuit. Therefore, this circuit can be used as the switching circuit 15a, and it is not necessary to separately provide the switching circuit 15a in the chip selection circuit 15, and the conventional chip selection circuit can be used as it is. Note that the built-in R of the CPU 11 is used as an auxiliary ROM.
Instead of using the OM, an electrically non-rewritable auxiliary ROM can be provided separately, and the initialization program can be stored in the auxiliary ROM and can be selected freely. In this case, as described above, The chip selection circuit 15 may be provided with a separate switching circuit 15a.

[0025]

As described above, according to the present invention, the first initialization program for performing the initialization processing of the vending machine is provided with the auxiliary R
A second initialization program for initializing the vending machine is stored or stored in the main ROM while being stored in the OM, and the first initialization program in the auxiliary ROM and the second initialization program in the main ROM are stored. By selecting any one of the initialization programs by the switching means, the improved initialization program can be executed, and a better initialization process can be performed. Even when the initialization program in the main ROM is rewritten due to runaway or an erroneous signal input from the outside and normal initialization processing cannot be performed, the initialization processing can be performed without any trouble. Reliability can be maintained.

The main ROM is allocated to a plurality of areas in the memory space of the CPU so that the main ROM can be similarly accessed from a plurality of areas in the memory space of the CPU.
Is configured so that the memory area of the auxiliary ROM and the memory area of the main ROM overlap with each other in the startup area of the memory space automatically accessed, thereby changing the startup processing with a relatively simple circuit configuration. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic control circuit configuration relating to a vending machine initialization processing device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of a chip selection circuit in the initialization processing device.

FIG. 3 is a diagram schematically showing an address map by a chip selection circuit in the initialization processing device.

4A and 4B are diagrams schematically showing an address map of a memory space in the initialization processing device.

FIG. 5 is a block diagram showing a schematic control circuit configuration of a conventional vending machine initialization processing device.

FIG. 6 is a block diagram showing a schematic control circuit configuration relating to another conventional vending machine initialization processing apparatus.

[Explanation of symbols]

11 CPU 12 Main ROM 12a Control program 12b Initialization program (second initialization program) 13 Main RAM 14 Clock section 15 Chip selection circuit 15a Switching circuit 16 Data bus 17 Auxiliary RAM 18 Auxiliary ROM 18a Initialization program (1st initialization program) Initialization program)

Claims (3)

[Claims] 1. An electrically rewritable main ROM.
And a vending machine having an electrically non-rewritable auxiliary ROM, a first initialization program for performing a vending machine initialization process is stored in the auxiliary ROM, and the vending machine initialization process is performed. The second initialization program to be executed is stored in the main ROM, or is configured to be able to store the first initialization program in the auxiliary ROM and the second initialization program in the main ROM.
Initialization processing device for a vending machine, comprising a switching means for selecting one of the initialization programs. 2. A main ROM is allocated to a plurality of areas in a memory space of a CPU so that the main ROM can be similarly accessed from a plurality of areas in a memory space of the CPU. 2. The vending machine initialization processing apparatus according to claim 1, wherein a memory area of the auxiliary ROM and a memory area of the main ROM overlap each other in a startup area of a memory space to be accessed. 3. The auxiliary ROM has a built-in R built in the CPU.
The vending machine initialization processing apparatus according to claim 1 or 2, which is an OM.