@awwwwa 感谢大神！可以识别到tf卡了，再次感谢！

@awwwwa 改了后打印还是一样的错误？？大神后面怎么解决的？

root@(none):/# dmesg | grep udc
[    0.100478] sunxi_usb_udc 44100000.udc-controller: sunxi:sunxi_usb_udc UDC Inner DMA Feature - wordaddr: -1, extend: disabled
[    0.100950] sunxi:sunxi_usb_udc:[INFO]: write to rise data: 0x0
[    0.101028] sunxi:sunxi_usb_udc:[INFO]: write to trancevie data: 0xb
[    0.101036] sunxi:sunxi_usb_udc:[INFO]: write to preemphasis data: 0x2
[    0.101049] sunxi:sunxi_usb_udc:[INFO]: write to resistance data: 0x8
[    0.101123] sunxi_usb_udc 44100000.udc-controller: 44100000.udc-controller supply udc not found, using dummy regulator
[    5.507731] udc 44100000.udc-controller: failed to start g1: -19
root@(none):/#