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Test method of key matrix keyboard

A technology of a matrix keyboard and a testing method, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., can solve the problems of unable to cover the pull-down resistance of the matrix keyboard port, low test efficiency, and large uncertainty of manual operation. The effect of ensuring accuracy and improving efficiency

Active Publication Date: 2012-06-27
FUJIAN LANDI COMML EQUIP CO LTD
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Problems solved by technology

[0003] At present, the test of the key matrix keyboard relies on two methods: manual test and loopback line test. The manual test scheme has the problems of low test efficiency and large uncertainty of manual operation; High, but can not cover the pull-down resistance of the matrix keyboard port line

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  • Test method of key matrix keyboard

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Embodiment Construction

[0018] see Figure 1 to Figure 2 As shown, the embodiments of the present invention will be described in detail.

[0019] A method for testing a matrix keyboard of buttons, comprising a matrix keyboard and a programmable logic device, comprising the steps of:

[0020] Step 1: the line that the matrix keyboard is connected to the CPU is connected to the programmable logic device through a test point, and a plurality of buttons are selected on the matrix keyboard, and the buttons cover all the ports that the matrix keyboard is connected to the CPU;

[0021] Step 2: The programmable logic device simulates the selected button signal, and sends the button signal to the CPU through the test point; the programmable logic device resets, triggers through the trigger signal, and enters the simulation first stage after a set period of time. The program of one button sends the simulated first button signal to the CPU, and then enters the program of simulating the next button after the se...

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Abstract

The invention provides a test method of a key matrix keyboard, which needs a matrix keyboard and a programmable logic device. The test method comprises the following steps that: 1, a line of the matrix keyboard connected to a CPU (Central Processing Unit) is connected on the programmable logic device through a test point, a plurality of keys are selected on the matrix keyboard, and the keys cover all mouth lines of the matrix keyboard connected to the CPU; 2, the programmable logic device simulates a selected key signal and sends a simulating key signal to the CPU through the test point; 3, if the CPU receives the simulating key signal sent by the programmable logic device, the mouth lines and the CPU are normally welded; and if the CPU does not receive the simulating key signal sent by the programmable logic device, the mouth lines and the CPU are abnormally welded. The test method can realize automatic test, and the test efficiency and the test coverage can be increased.

Description

【Technical field】 [0001] The invention relates to a method for testing a key matrix keyboard. 【Background technique】 [0002] Keyboards are widely used in various electronic devices as peripheral devices for controlling commands or data input of the electronic devices. Therefore, the quality of the keyboard and whether its functions can be operated normally will directly affect the operational stability of the electronic device, and since the most direct operating unit in the keyboard is the key, the test of the key is an important part of the keyboard. . [0003] At present, the test of the key matrix keyboard relies on two methods: manual test and loopback line test. The manual test scheme has the problems of low test efficiency and large uncertainty of manual operation; High, but it cannot cover the pull-up and pull-down resistors of the matrix keyboard. 【Content of invention】 [0004] The technical problem to be solved by the present invention is to provide a method...

Claims

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Application Information

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IPC IPC(8): G01R31/02
Inventor 苏龙肖锋郑云斌念恩
Owner FUJIAN LANDI COMML EQUIP CO LTD
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