JPH0566735U - Keyboard simulator - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a keyboard simulator that can easily change keyboard data. The keyboard data is stored in a ROM 22, and a keyboard data selection circuit 21 for instructing which data of the keyboard data is to be sent and a control signal generating circuit 23 for instructing when to send the data to the keyboard input circuit. In accordance with the instruction, the keyboard data is sent from the ROM 22 to the keyboard interface 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a keyboard simulator for testing a computer having a keyboard input circuit.

[0002]

[Prior Art]

 FIG. 2 is an explanatory diagram showing a conventional keyboard interface test method.

The key address generation circuit 31 of the personal computer 3 to be tested outputs an address signal S3. The address signal S3 is input to the keyboard 4 through the keyboard interface 32. Then, the tester sequentially presses the key switches on the keyboard 4 to send the keyboard data S4 to the personal computer 3, and the keyboard data 4 is processed by the CPU (not shown) through the keyboard interface 32 and displayed on the display 5. To be done. The tester determines whether or not the keyboard interface 32 is normal by comparing the pressed key switch with the display on the display 5.

FIG. 3 is an explanatory diagram showing an example of a conventional keyboard simulator.

This keyboard simulator 8 has signal _lines X ₀ , X ₁ , ... X _n−1 , X _n , Y ₀ , Y ₁ , ... Y _n− similar to the keyboard 4 shown in FIG. _{By making} the XY line composed of ₁ and Y _n conductive by the relay 80 and issuing the data S8 which is substantially equal to the data S4 of the keyboard shown in FIG. Perform the test.

[0006]

[Problems to be solved by the device]

 In the conventional keyboard interface test method shown in FIG. 2, since the tester inputs data from the keyboard, an input error may occur. In addition, it took a lot of time and effort to check all the keyboards.

In addition, since the conventional keyboard simulator shown in FIG. 3 includes a relay circuit, the relay main body has a mechanical life, and when the keyboard data needs to be changed, the wiring of the relay circuit is performed. It had to be changed, and this wiring change work also took days.

An object of the present invention is to provide a keyboard simulator that can easily change keyboard data without considering the mechanical life.

[0009]

[Means for Solving the Problems]

 The keyboard simulator of the present invention is a keyboard simulator for testing a computer having a keyboard and a keyboard interface, wherein the keyboard data is stored and a nonvolatile memory for outputting the data according to a given instruction, and the keyboard data. And a keyboard data selection circuit for selecting data to be output from the keyboard data and instructing it to the memory.

The keyboard simulator of the present invention inputs the data from the non-volatile memory through the reference data section which stores the data equivalent to the non-volatile memory and the keyboard interface of the computer, and stores the input data. The computer may be provided with a comparison circuit that compares the data stored in the reference data unit to determine whether the input data is correct.

[0011]

[Action]

 When the timing for outputting the data of the keyboard and the data to be output are instructed by the control signal generating circuit and the keyboard data selecting circuit, respectively, the memory outputs the data in accordance with the instruction. Since the output data will be substantially the same as the data that the tester conventionally pressed to output the data, the tester does not need to enter the keyboard. Also, if the contents of the memory are changed, the output data will be changed.

[0012]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In this embodiment, a personal computer 1 as a computer to be tested, which has a key address generation circuit 11, a reference key data section 12, a comparison circuit 13 and a keyboard interface 14, a keyboard 21, a non-volatile memory. Read-only memory (hereinafter referred to as ROM) 22 and a keyboard simulator 2 having a control signal generating circuit 23. The same data is stored in the reference data section 12 and the ROM 22.

An address signal S 1 is output to the key address generation circuit 11 of the personal computer 1. The address signal S1 is input to the keyboard simulator 2 through the keyboard interface 14. Here, the control signal generation circuit 23 in the keyboard simulator 2 outputs an instruction for instructing the timing of outputting the data S2 which is substantially equal to the data S4 of the keyboard shown in FIG. 2, and then the keyboard data selection circuit. A command for instructing which data S2 to output is output from 21, and each command is given to the ROM 21. The ROM 21 sequentially outputs the data S2 to the personal computer according to the given instruction.

In the personal computer 1, the data S 2 output from the ROM 22 is input to the comparison circuit 13 via the keyboard interface 14. The comparison circuit 13 compares the input data S2 with the reference key data stored in the reference key data section 12 to determine whether the input data S2 is correct, that is, the keyboard interface 14 is normal. Determine if there is.

[0017]

[Effect of the device]

 As described above, in the present invention, the tester does not have to directly input the keyboard by outputting the keyboard data from the memory. Therefore, the keyboard interface process can be automated.

Further, there is no mechanical life such as a relay life, and there is an effect that keyboard input data can be changed simply by changing the contents of the memory.

In addition to the above effects, the invention according to claim 2 has the effect that the tester does not have to look at the display, so that the keyboard interface process can be further automated.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a conventional keyboard interface test method.

FIG. 3 is an explanatory diagram showing an example of a conventional keyboard simulator.

[Explanation of symbols]

 1 Personal Computer 2 Keyboard Simulator 11 Key Address Circuit 12 Reference Key Data Section 13 Comparison Circuit 14 Keyboard Interface 21 Keyboard Selection Circuit 22 ROM 23 Control Signal Generation Circuit

Claims (2)

[Scope of utility model registration request] 1. A keyboard simulator for testing a computer having a keyboard and a keyboard interface, a nonvolatile memory for storing the data of the keyboard and outputting the data according to a given instruction, and a timing for outputting the data of the keyboard. And a keyboard data selection circuit that selects data to be output from the data of the keyboard and instructs the memory to select the data to be output. 2. A reference data section storing data equivalent to that of a non-volatile memory and data from the non-volatile memory is input through a keyboard interface of a computer, and the input data is stored in the reference data section. The keyboard simulator according to claim 1, further comprising: a comparison circuit for comparing the stored data to determine whether the input data is correct or not in the computer.