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key
- PIC18F452的4*4矩阵按键,不是用反转法,而是用行扫描法,实现功能是单键有效,多键不操作的功能。-PIC18F452 4* 4 matrix keys, not with inversion method, but with the line scanning method, to achieve effective function is a single bond, multi-key does not operate.