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am335x把USB0-OTG模式改为HOST模式插入u盘5秒后才有反应



我使用TI官网自带的内核,默认USB0是OTG模式。我把USB0改为HOST模式,当我插入u盘后大约5秒后串口才有打印信息,但是把u盘插入USB1时立即就有打印信息,拷贝数据时USB0和USB1速度相同,请问这是怎么回事?