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PicoScope 6 便携示波器应用案例分享

发布时间:2019-08-05    浏览次数:1488

  20世纪80年代后, MCU和MPU开始在汽车中被广泛使用,汽车电子化进程开始逐年加快。近几年,智能化和网联化在汽车行业兴起,汽车电子化程度更上一层楼。据统计,当前汽车的创新70%来源于汽车电子产品,电子产品成本占整车比例已经从上世纪70年代的4%,成长到现在的30%左右。未来仍将进一步提升,预期到2030年,该比例将可达到50%。在电子零部件越来越多,信息传输量越来越大的需求促动下,汽车网络化势头已经不可挡。因此,传统的电气网络已无法适应现代汽车电子系统的发展,新型汽车总线技术应运而生。

  目前汽车上普遍采用的汽车总线有局部互联协议LIN和控制器局域网CAN,正在发展中的汽车总线技术还有高速容错网络协议FlexRay,用于动力传感器和电子控制单元(ECU)之间的通信协议SENT。

  实际情况中,由于购买一台示波器尤其是进口的设备价格不菲,而且解码软件往往不是免费提供的,通常一个串行总线解码软件选项可能需要几百上千美金,将以上所有的总线协议分析全部配齐将会是一笔不小的开支。这也导致很多工程师无法使用上先进的工具来提升他们的工作效率。

  PicoScope 6 软件支持多种协议解码,并且支持多通道多总线分析如图1。


  英国比克科技(Pico Technology)的基于PC 的便携式示波器是适合于嵌入式系统总线解码的高性价比方案,特别是所有的软件包括解码软件都是标准配置,而且将来还可以免费升级使用最新的软件和新增加的解码选项,就算是很便宜的示波器产品只需要一百多美金,即可获得包含汽车总线协议分析在内的近 20 种的串行总线解码分析软件如图2。