This paper describes design and implementation of a JTAG controller using PCI interface for Nexperia PNX1300/1500 series DSPCPU,mainly focuses on the JTAG standard and operation principle,the circuit design and the software development are also demonstrated.This control board has been used in the embedded system development based on PNX1300 and worked well.
描述了PCI总线仲裁的原理和仲裁算法,阐述了用可编程器件实现总线仲裁的具体方法,并实现了一个双主设备仲裁器。
GUI(Graphic User Interface) based embedded applications are now widely in use.Common GUI products are usually large in size and complicated in detail.An embedded GUI system,which is more lightly weighted than most of current GUI products,was proposed in this paper.Due to adopting both object oriented modularized designing and a well-designed simulator,it is more convenient to develop this system.Its implementation in Video Conference Terminals was also introduced.In this implementation,this system took small memory size,and cost significantly short development time.It greatly reduced the cost of both product hardware and development labor.
ABU(亚广联)于2002年8月31日在日本东京举行了首届亚太地区大学生机器人大赛,CCTV中国大学生机器人大赛冠亚军得主中国科技大学机器人队代表中国参赛并荣获亚军.我们研制的由视觉系统控制的机器人还获得了最高技术奖,成为本次大赛的一个亮点.本文介绍了这个机器人的视觉控制系统.
介绍了舞蹈机器人步进电机驱动电路和程序设计.电路采用74373锁存,74LS244和ULN2003作电压和电流驱动,单片机AT89C52作工作脉冲序列信号发生器.程序设计基于中断服务和总线分时复用方式,实时更新各个电机的速度和方向.
