Android平台矩阵键盘的设计与实现

Design and Implementation of Matrix Keyboard for Android Platform

随着终端智能化的快速发展,矩阵键盘在工控类终端中得到了广泛应用。介绍了工控终端的软硬件平台,使用I2C接口的TCA8418芯片来扩展矩阵键盘,在Linux4. 4内核中对矩阵键盘驱动进行了适配,在Android6. 0平台上实现了矩阵键盘的功能;通过功能测试验证了工控终端实体按键的功能。采用的方法较好地解决了嵌入式硬件平台扩展矩阵键盘的设计问题,为工控终端的实体按键设计提供了可靠的方法。

With the rapid development of terminal intelligence,matrix keyboards have been widely used in industrial control terminals. The paper introduces the software and hardware platform of the industrial control terminal. The TCA8418 chip with I2 C interface is used to extend the matrix keyboard. The matrix keyboard driver is adapted in the Linux4. 4 kernel,and the function of the matrix keyboard is realized on the Android6. 0 platform,the function of industrial control terminal entity buttons is verified through functional tests. The method adopted in the paper better solves the design problem of the extended matrix keyboard of the embedded hardware platform;it provides a reliable method for the entity buttons design of the industrial control terminal.