摘要
针对大型复杂装备电路母板故障诊断的测试需求,提出了一种基于USB总线接口的便携式自动测试系统;该系统采用Cy-press公司的EZ-USB FX2系列芯片CY7C68013实现USB2.0接口,同时EZ-USB单片机提供的I2C输出接口可以直接将来自主机的串型传输转换为I2C格式的数据进行输出,测试单元之间通过I2C总线互连,I2C收发器选择了I2C总线数据与8位并行数据转换的专用IC——PCA9501实现;该系统支持热插拔,可以实现高速快捷的故障定位;系统使用方便,可靠性高,已经在工程实际中使用。
To meet the test need of fault diagnosis for large--scale complex equipment PCB motherboards, the authors put forward a portable ATS based on USB interface in the paper. The system adopts USB 2. 0 interface to realize communication function between the main control computer and test resources, the USB chip is CY7C68013 that belongs to EZ--USB FX2 series, which has an I^2C interface can be used to realize the information translation function between serial data and I^2C data. I^2C bus is used to connect test units in the system. The I^2C transceiver in the system is PCA9501 that is a special data transmission chip. The system sustains plug and play characteristic, which can realize high speed fault isolation. The system reliability is high, and has been used in the practice.
出处
《计算机测量与控制》
CSCD
北大核心
2009年第12期2407-2409,共3页
Computer Measurement &Control
