RS232协议触发在示波器中的应用

RS232协议触发在示波器中的应用

内容简介：在数字存储示波器中,触发电路的作用就在于保证每次采集的数据,都是从输入信号上的一个精确确定的点开始,这样每一次扫描的波形就是同步的,从而显示稳定的波形.基本示波器触发有边沿触发,斜率触发,脉宽触发.但对RS232信号来说,由于其波形不是周期的,这些触法方式都不能显示稳定的波形.文章基于Xilinx公司的XC3S250ETQ144芯片设计了一个模块,它可以检测RS232总线开始传输数据的信号,结束传输数据的信号,或者总线上传送的数据进行触发,并且具有很强的移植性.

Abstract：in the Digital Oscilloscope,the Purpose of trigger circuit is Guaranteed each collected data is from a precise determi-nation start point of the input signal. So, the wavefrom collected is synchronous every time, and displaying Stable waveform. The basic trigger modes are Edge trigger, slope Trigger, plus trigger, But RS232 signal is not a periodic signal. These Trigger Modes can not display Stable waveform. In this essay, a module is designed Based on the products named XG3S250ETQ144 of Xilinx company to detect the begin signal of transmission, the end signal of transmission, or the data is transmitted to trigger. This mod-ule can be transplanted easily,

作者：樊国慧, 田书林, 邱渡裕,

关键词：触发, 示波器, FPGA, RS232串行协议