Abstract: The introduction of Computer Operating Properly(COP) in embedded system can guarantee the normal operation of system, and automatically come back to the normal operation from failure. It does not require special treatment or only to use simple memory recovery after COP reset will be able to bring the system back to the normal running. If system includes some special module such as USB module, the above methods can not work. Take a data acquisition system as a example, the failure mechanism about USB module are discussed, and a countermeasures based on register recovery is given, which can effectively rescue system’s similar paralys after COP reset.

Key words: USB1.0, Computer Operating Properly(COP), JB8 MCU

摘要： 嵌入式系统中引入COP能保证系统能从故障点自动恢复正常运行。COP复位后采用简单的内存恢复方法即可使系统恢复正常运行，但不适用于带有USB等特殊模块的系统。研究USB模块运行机制，设计带有USB模块的数据采集系统，提出一种基于寄存器恢复的COP复位处理方法，该方法能有效解决带有类似特殊模块的系统的COP复位问题。

关键词: 通用串行总线协议1.0, 系统正常操作监视模块, JB8单片机

CLC Number: 

• TP311.52