51 MCU 4*4 matrix keyboard scanning (beginner)

大一王

51 MCU 4*4 matrix keyboard scanning (beginner) [Copy link]

Function:
Scan and read the input of 4*4 matrix keyboard and display it on digital tube, and the scanning includes de-jitter processing. Contains C source code and Proteus simulation file, including schematic diagram;

Note: Only the display of 0-15 is realized, and the numbers displayed by the 6 digital tubes are the same.

大一王

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空格键的自白

It is not recommended to use delay to eliminate jitter, or even not to use it. In a small-scale program, the impact may not be very obvious. Try not to use soft delay. Use timed delay, which will not interfere with the operation of the main program, and can determine whether the key is long pressed.

大一王

Confession of the Spacebar was published on 2021-9-10 09:21 It is not recommended to use delay to eliminate jitter, or even not to use it. In smaller programs, the impact may not be very obvious. Try not to use soft delay, use timed delay...

OK, thanks for the reminder.

baopodao

During keyboard scanning, do not wait until the key is released before proceeding. It is best to consider the operation of concurrent events, which will make the program more flexible.

大一王

baopodao posted on 2021-9-10 14:27 During keyboard scanning, do not wait until the key is released before executing. It is best to consider the operation of concurrent events, so that the program is more flexible.

When you are just getting started, you can only start writing from the simplest and most concise.

陈工人士

Thanks