1. 概述

TODO，基本啥都没有，封装了╮(╯▽╰)╭

2. 封装库

2.1 so库

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/lib/dll/devu-hcd-ohci.so 

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/lib/dll/devu-hcd-xhci.so

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/lib/dll/devu-hcd-ehci.so

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/lib/dll/devu-hcd-uhci.so 

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/lib/dll/devu-dcd-usbncm-qcom-dwc3.so

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/lib/libusbdi.a 

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/lib/dll/devnp-usbdnet.so

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/lib/dll/deva-ctrl-usb.so

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/lib/dll/devh-usb.so

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/usr/lib/libcapture-usb-uvc.so

2.2 bin文件

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/sbin/io-usb-otg

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/sbin/io-usb-otg.sym

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/sbin/usb.sym

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/sbin/devc-serusb

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/sbin/devc-serusb_dcd

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/sbin/usb

qnx_ap/qnx_bins/prebuilt_QNX700/target/qnx7/aarch64le/sbin/devu-umass_client-block

2.3 配置文件

qnx_ap/qnx_bins/prebuilt_QNX700FIXME/target/qnx7/etc/usblauncher/ 

# ls /etc/usblauncher/
iap2.lua       rules.mnt      usb1.lua
iap2ncm.lua    umass.lua      usb2.lua

3. 进程/服务

io-usb-otg

这个就是USB的管理器，通过硬件控制器驱动程序(dll)管理USB总线和USB协议/工作模式。io-usb-otg管理器支持USB主机模式和USB设备模式(主从模式)。当io-usb-otg从一种模式切换到另一种模式时，它可以自动启动和停止适当的dll。

usblauncher_otg 

这个是USB启动器服务，

# pidin a | grep usb
  307255 io-usb-otg -t memory=/memory/ram/dma -dqcom-xhci ioport=0xa800000,irq=170,soc=8155,memory=/memory/ram/dma, -n /dev/usb2/io-usb-otg
  356410 usblauncher_otg -S 2 -c /etc/usblauncher/usb2.lua -M /etc/usblauncher/rules.mnt -m /var/pps -n /dev/usb2/io-usb-otg -E -e -0
  430143 io-hid -dusb

4. 调试

4.1 查看usb信息

# usb -vv
USB 0 (XHCI) v1.10, v1.01 DDK, v2.00 HCD, DLL: Active
    Control, Interrupt, Bulk(SG), Isoch(Stream), High Speed, Super Speed, Super Speed Plus, DMA:32-bit

# use usb
usb - Display USB device configuration

Usage:
usb [options]*

Options:
  -N name       Name of the USB manager to query (e.g. "/dev/usb/io-usb-otg" )
  -b busno      Display devices on specific 'busno' only
  -d devno      Display device 'devno' only
  -D            Get descriptor data from device, instead of stored data.
                (io-usb-otg by default stores standard descriptor information)
  -t            Alternative output format (tree-like)
  -a            Display descriptors of type 0x24 under the config descriptor
                as audio descriptors
  -v            Increase level of verbosity
  -V            Display vendor-unique descriptors (at given verbosity level)

5. 扩展

TODO

5.1 USB EYE(眼图)

TODO

5.2 Cayplay

TODO

5.3 AOA(Android Auto)

TODO

5.4 USB MIC(卡拉OK)

TODO

5.6 USB CAM

TODO