嵌入式逻辑分析仪在fpga试验教学中的应用-河北工业科技.pdfVIP

27 1 河 北 工 业 科 技 Vol. 27, No. 1 2010 1 H ebei Journal of Indust rial Science and Technology Jan. 2010 : 100 -1534( 2010) 01- 0041-05 FPGA , ( 安徽师范大学物理与电子信息学院, 安徽芜湖 241000) : 在FPGA 实验教学和课程设计 , 逻辑分析仪是最重要的调试工具但由于高校经费紧 张, 难以配置齐全设备, 而且逻辑分析仪I/ O 引脚引出困难, 引脚数量有限, 连线复杂, 对内部信号 的获取和分析也较困难为此介绍一种 SignalTap Ò嵌入式逻辑分析仪, 它成本低廉, 升级方便, 能对所有内部信号和外部引脚信号进行探测通过对电路进行模块化的分析, 合理设置触发条件, 实现更有效更准确的电路调试和排错最后以PS2键盘接口电路的FPGA 设计为例, 阐明建立 配置和运行SignalTap Ò的一些具体方法和步骤 : FPGA; SignalT ap Ò; 嵌入式逻辑分析仪; PS2 键盘接口电路 : TP216 : A Application of embedded logic analyzer in FPGA experimental teaching WU Zhao-hui, ZHANG Ch-i jian ( College of Physics and Electronic Information, Anhui Normal Universit y, Wuhu Anhui 24 1000, China) Abstract:In the FGPA experimental teaching and curriculum design, logic analyzer is a most important tool for debugging . H ow ever, because of tight funding for colleges and universities, it is difficult to f it up wit h a full set of equipment. Moreover, the I / O pins of logic analyzer is difficult to connect, and it has limited number of pins, and is it very difficult to acquire and an- alyse t he internal signals. So here described is the SignalTap Ò embedded logic analyzer, w hich costs low and is easy to up- grade. It can detect all internal signals and I/ O pins signals. Through modular analyzing, setting reasonable values for trigger conditions, it can debug or troubleshoot circuit more effectively and accurately . Finally, taking the FPGA designs of PS2 key- board interface circuit as the example, this art icle illustrat ed the usages and procedures of SignalTapÒ. Key words:FPGA; SignalT apÒ; embedded logic analyzer; PS2 keyboard interface circuit FPGA , , , 50%,