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AM335X Android-JB4.2.2开发包中led驱动的app层的接口函数是什么???



求指导下,对Android一点不熟,不知道怎么自己写app接口函数,感觉这个开发包里面文件系统对led的HAL JNI APP各层的接口应该是已经存在的,求指导下改如何提供给上层app开发人员。