摘要
介绍了利用DSP F2812系统外部接口(XINTF)实现与键盘接口的方法。首先描述了DSP F2812系统外部接口XINTF的特点,接着给出了一种适于总线接口的键盘控制电路,着重分析了该键盘控制电路的工作原理,并在最后给出了该键盘控制电路具体实现方法以及用DSP外部中断方式实现键盘键码识别的C语言编程。
Introduces a method to make use of the DSP F2812＇ XINTF to connect keyboard to DSP .Firstly, the paper describes the main features of XINTF of DSP F2812 .Secondly, presents a design scheme of keyboard controller which is suitable for XINTF of DSP, and then discusses the work principle of that keyboard control electric circuit. At last, gives a specific hardware and software implementation method for the keyboard using CPLD and C program language respectively.
出处
《仪器仪表用户》
2008年第1期97-99,共3页
Instrumentation
