Keyboard matrix pagerank method based on Boolean process

Abstract

This invention relates to a keyboard matrix unscrambling method based on Boolean process including the following steps: defining flag bits, scanning output lines of the keyboard matrix, enquiring if there is a key pressed, enquiring the key to unscramble flag bits, eliminatiung dithering delay, enquiring the level of which port is changed, enquiring which corresponding input port has output scan level to be analyzed by the corresponding operation key and the set key unscrambles the flag bits, which provides a keyboard matrix scan unscramble mode more quickly and accurately.

Description

technical field [0001] The invention relates to a keyboard scanning and interpretation method, in particular to a keyboard matrix scanning and interpretation method based on Boolean processing, which is used for MCU single-chip microcomputers. Background technique [0002] In the traditional textbooks of various electronic majors and available literature, the scanning interpretation of the keyboard matrix related to the operation of the MCU single-chip microcomputer is mostly through row-by-row scanning, key-value calculation, return of corresponding key feature quantities, and query. Table and other data processing methods are used for scanning and interpretation. For this reason, it is necessary to set the row value and column value buffer registers to assist in saving the original value when calculating the key value; For processing, the key interpretation process is often performed after the closing key is released and the de-jittering delay is performed during the progr...

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Problems solved by technology

[0002] In the traditional textbooks of various electronic majors and available literature, the scanning interpretation of the keyboard matrix related to the operation of the MCU single-chip microcomputer is mostly through row-by-row scanning, key-value calculation, return of corresponding key feature quantities, and query. Table and other data processing methods are used for scanning and interpretation. For this reason, it is necessary to set the row value and column value buffer registers to assist in saving the original value when calculating the key value; Processing, the key interpretation process is often performed after the closing key is released and the de-jittering delay is in the middle of the program running; in this way, the scanning and interpretation of the keyboard takes up a lot of CPU time, and at the same time reduces the working efficiency of the CPU

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