Cortex-M4核Kinetis平台的电容式触摸键盘设计  

Design of Capacitive Touch Keyboard Based on Kinetis Platform with Cortex-M4 Core

作　　者：纪成[1] 王金晨[1] 王菲[1] 

机构地区：[1]山东大学控制科学与工程学院,济南250061

出　　处：《单片机与嵌入式系统应用》2012年第7期48-51,共4页Microcontrollers & Embedded Systems

摘　　要：针对传统机械式按键的不足,采用飞思卡尔Kinetis平台K60系列MCU,设计了一种电容式触摸键盘。阐述了电容式感应触摸原理,介绍了K60系列MCU的内部TSI模块工作机制,给出了简化的接口设计和键盘PCB布局方法,最后详细地分析了TSI模块软件驱动设计流程。Aiming at the shortage of traditional mechanical keys, a capacitive touch keyboard is designed based on Freescale Kinetis K60 series MCU. This paper describes the principle of capacitive touch sensing, introduces the working mechanism of internal TSI module on Kinetis K60 series MCU,and the simplified interface design and PCB layout of the keyboard are given. At last, the design progress of the software driver of TSI module is analyzed in detail.

关 键 词：Cortex—M4 电容式触摸 KINETIS TSI模块 键盘PCB布局 

分 类 号：TP334.23[自动化与计算机技术—计算机系统结构]