Should be the most comprehensive C-based 4x4 matrix keyboard driver. Contains three scan mode, to adapt to two different connection matrix keyboard, optional software debounce handling, also includes Taobao based on most common 4x4 film keyboard driver model: HC-543. A total of five drivers. Development Environment: Keil

KEY_4X4_HC-543.H
KEY_4X4_Scan_CR.H
KEY_4X4_Scan_RC.H
KEY_4X4_Table.H
KEY_4X4_Direct.H

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