文献类型：期刊文献

英文题名：Design and realization of general matrix keyboard based on STM32

作者：Shi, Kai[1]; Wang, Zhanquan[1]; Luo, Fei[1]; Gu, Chunhua[1]

机构：[1] Institute of Information Science and Engineering, East China University of Science and Technology, Shanghai, China

年份：2014

起止页码：447

外文期刊名：2014 2nd International Conference on Systems and Informatics, ICSAI 2014

收录：EI(收录号：20150700520449)

语种：英文

外文关键词：Display devices - Embedded systems - Signal encoding - Computer hardware - Human computer interaction

摘要：The matrix keyboard is taken as the basic input device of MCU or embedded systems. For traditional matrix keyboard, the number of interface signal lines connected to the MCU will rapidly increase with the rise of the number of keys. And it uses row scanning to get key values in software. But this situation is not suitable for MCU (Micro-programmed Control Unit) or embedded chips which have limited hardware resources, especially in the application with human-computer interaction. A novel scheme of general matrix keyboard based on set mapping theory is proposed in this paper. It uses the combination of external interrupt and priority encoder to overcome the problems in the traditional matrix keyboard. The design details of the hardware and software are presented. Through the application in the interactive display board system, it shows that the proposed scheme is feasible and effective. ? 2014 IEEE.