基于PC104及FPGA的多功能脉冲接口卡的实现

Realization of Multifunctional Interface Card Based on PC104 and FPGA

介绍一种基于PC104及FPGA(现场可编程门阵列)的多功能脉冲接口卡的设计和实现。该接口卡的设计符合PC104总线标准,并采用FPGA作为核心器件,简化了硬件电路,除了少数接口器件外,大部分逻辑均在FPGA内部实现,性能稳定、抗干扰能力强。其主要功能是输出高精度的脉冲,对正交编码脉冲信号进行检测。

This paper introduces a design of multifunctional interface card based on PC104 and FPGA. The design of this card accords with PC104 bus standard, and uses FPGA as kernel component. Except several interface ports, most of the logic circuits are integrated in one chip of FPGA, which can simplify the hardware circuit. As a result, the interface card can generate high- precision pulse signals and can be used in detection of quadrature encoder pulse（QEP） signal.