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我不是第一次使用,插上USB线没有叮咚一声,IDE连接显示没有找到openmv cams,之后没有弹出是否有变砖。我没有摔过,测了一下3.3v电压是正常的,我是想更新固件,刚开始是可以用的,后来按照操作连接boot和rst引脚后还是没有更新好,之后再用直接都不弹出“你是否有openmv变砖”这个窗口了,就只有“没找到openmv cams”