|
发表于 2021-8-14 17:14:10
|
显示全部楼层
发现一个小问题: 关机插电脑充电时, linux下会发现有USB full-speed设备接入, 但是枚举不了.
- [19028.392805] usb 1-2: new full-speed USB device number 42 using xhci_hcd
- [19028.552825] usb 1-2: device descriptor read/64, error -71
- [19028.822822] usb 1-2: new full-speed USB device number 43 using xhci_hcd
- [19028.982830] usb 1-2: device descriptor read/64, error -71
- [19029.102837] usb usb1-port2: attempt power cycle
- [19029.812809] usb 1-2: new full-speed USB device number 44 using xhci_hcd
- [19029.812957] usb 1-2: Device not responding to setup address.
- [19030.032804] usb 1-2: device not accepting address 44, error -71
- [19030.192815] usb 1-2: new full-speed USB device number 45 using xhci_hcd
- [19030.192963] usb 1-2: Device not responding to setup address.
- [19030.412805] usb 1-2: device not accepting address 45, error -71
- [19030.412860] usb usb1-port2: unable to enumerate USB device
复制代码
感觉是设备端的DP/DN上的1.5k上拉没有关掉(忘了是DP还是DN), host识别为有USB设备接入了, 然而MCU并没有响应枚举.
windows下估计是一样的, 只是windows不报错而已. |
|