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SCM matrix keys two digital tube display 01 ~ 16

Time:09-16

O C complete code, to achieve a 4 * 4 matrix keyboard, number order after the first column, the key line 1 as 1, 1 line 2 as 2 key... And so on, a total of 16 key detected after buttons, two key digital tube display, such as: in the first 2 rows column 1 key, the digital tube display 05,

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