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6X6rectangle
- 一般采用整排端口如P1做4X4矩阵,实际上有可能用到两排端口做6X6矩阵键盘,这里做了个6X6键盘-Generally use the whole row of ports, such as P1 to do 4X4 matrix, in fact, may be used to do two rows of 6X6 matrix keyboard port, here made a 6X6 keypad