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Design of logic analyzer based on oscilloscope displaying
Author(s): ZHENG Tong, LI Hongwei, DING Ru, GENG Liqing(departmentofautomation, TIANJIN Universityoftechnologyandeducation, TIANJIN 300222, china)
Pages: 20-
22
Year: 2005
Issue:
2
Journal: Journal of Tianjin Vocational Technical Teachers'c
Keyword: 逻辑分析仪; CPLD; 示波器;
Abstract: 以CPLD可编程逻辑器件为控制核心,以VHDL语言为设计工具,利用CPLD逻辑性强的优势,综合CPLD、常规数字和模拟电路技术完成简易逻辑分析仪设计。采用两块D/A芯片作为系统输出,同时提供示波器X、Y轴信号,在模拟示波器上实现同时显示8路信号的功能。该逻辑分析仪可以实现始端触发和终端触发,可根据触发方式分别显示触发前、后所保存的逻辑状态,并显示触发点位置和时间标志线移位。
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