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我看到有接线图了，但不明白p7,p8接到了哪里，求教，因为项目需要对例程做一些修改~
http://book.openmv.cc/project/zhui-xiao-qiu-de-xiao-8f665d28-project-pan-tilt-md.html#编写小车的模块
看car.py