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计时5秒后执行中断回调函数
我只是想下降沿触发后执行一个函数，没有参数
uart.write(0xa5) 这样不行啊
改成撞击小球，代码要怎么改动
openmv的翻转图像180°函数是什么？摄像头倒着装不上
