Multi-interface selection method and multi-interface selection circuit based on keyboard scan and display driving chip

A display driver and keyboard scanning technology, applied in keyboard coding, dynamic coding, etc., can solve the problems of inconvenient production debugging, maintenance and program management, achieve convenient debugging and after-sales maintenance, reduce overall costs, and improve development efficiency.

Inactive Publication Date: 2012-06-13
SHENZHEN CHK
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  • Abstract
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  • Application Information

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Problems solved by technology

This brings a lot of inconvenience to the production debugging, maintenance and program management of the series models using the same main control chip

Method used

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  • Multi-interface selection method and multi-interface selection circuit based on keyboard scan and display driving chip
  • Multi-interface selection method and multi-interface selection circuit based on keyboard scan and display driving chip
  • Multi-interface selection method and multi-interface selection circuit based on keyboard scan and display driving chip

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Embodiment Construction

[0018] Further description below in conjunction with accompanying drawings.

[0019] refer to Figure 1-3 , the present invention includes two parts of the operation panel and the main control board, the communication interface H2 on the main control board is connected with the communication interface H1 on the operation panel PCB through a cable.

[0020] A keyboard scan display driver chip U1 is set on the operation panel PCB, and the LED digital tube driven by the keyboard scan display driver chip U1 ( figure 2 not shown), communication interface H1, 4 row lines and 6 column lines, 4 row lines, 6 column lines are connected to the corresponding I / O ports of the keyboard scanning display driver chip U1, and the communication interface H1 is connected to U1 The serial port 14, 16Pin.

[0021] Among them, 2 row lines X3, X4 and 6 column lines Y1-Y6 form a 2×6 matrix, and the intersection points of the 2×4 matrix formed by row lines X3, X4 and column lines Y1-Y4 are allocated...

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Abstract

A multi-interface selection method based on a keyboard scan and display driving chip includes the steps: a, dividing intersections of an NXN array into n key positions and m jumper wire positions, enabling the m jumper wire positions to form a plurality of jumper wire position state combinations by selecting short connecting circuit lines, writing corresponding interfaces and functional subprograms according to functional requirements of a series of machine types adopting an MCU (microprogrammed control unit), and enabling the subprograms to be in one-to-one correspondence to the jumper wire position state combinations to be stored in a storage of a master control board; and b, obtaining key numbers on a PCB (printed circuit board) and binary values of jumper wire position state combinations by means of keyboard scan after an operating panel PCB of one machine type of a series of machine types is connected with the master control board through a communication interface, and utilizing the MCU to invoke the corresponding interface and subprograms according to the binary values and to switch to the corresponding interfaces, so that functional operation of the corresponding keys is completed. The universal master control board is employed, only one-time programming is needed, development of a novel machine type is facilitated, the method is suitable for batch production, and debugging and after-sale maintenance are facilitated.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic cooker design and manufacture, in particular to a multi-interface selection method and circuit based on keyboard scanning and display drive chips for a series of electromagnetic cooker models. Background technique [0002] The electric control part of the ordinary induction cooker is mainly composed of the power control board and the operation panel including the main control MCU. The main control MCU controls the power control board to realize various preset heating functions by obtaining the human-computer interaction information of the operation panel. Various cooking modes can be combined by heating power, time and temperature. In order to meet the functional requirements of different models of induction cookers, it is often necessary to compile different programs according to the functions of each model to be run by the MCU. This brings a lot of inconvenience to the production debug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M11/20H03M11/02
Inventor 丘守庆许申生谢荣华李鹏
Owner SHENZHEN CHK
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