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随着电子技术的发展,触摸按键作为一种接口技术在电子产品中得到了广泛的应用,由于电容式触摸按键具有寿命长、无机械磨损、易清洁、防水防污等特点,深受用户欢迎。该文结合电容触摸按键的原理,利用STM32单片机通用定时器的输入捕获功能,设计实现了4×4电容式触摸键盘系统。经测试,电路具有较高的可靠性。
With the development of electronic technology, touch keys as an interface technology has been widely used in electronic products, due to the capacitive touch keys with long life, no mechanical wear, easy to clean, waterproof stains, etc., welcomed by users. . Combined with the principle of capacitive touch keys, this paper designed and implemented a 4 × 4 capacitive touch keyboard system by using the input capture function of the STM32 general purpose timer. After testing, the circuit has high reliability.