How to enable USB gadget

1. If source code isn't compiled with gadget configs, please refer to How to compile

**Note: You can using kconfig or following command line to set USB gadget before make:

cat <<EOT >> gadget_config
#
# USB Physical Layer drivers
#
CONFIG_USB_GADGET=y
CONFIG_U_SERIAL_CONSOLE=y
CONFIG_SUNPLUS_USB_PHY=y
CONFIG_USB_SUNPLUS_OTG=y
CONFIG_GADGET_USB0=y
CONFIG_USB_GADGET_VBUS_DRAW=2
CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS=2
#
# USB Peripheral Controller
#
CONFIG_USB_GADGET_SUNPLUS=y
CONFIG_USB_LIBCOMPOSITE=m
CONFIG_USB_F_SS_LB=m
CONFIG_USB_U_ETHER=m
CONFIG_USB_F_NCM=m
CONFIG_USB_F_ECM=m
CONFIG_USB_F_SUBSET=m
CONFIG_USB_F_RNDIS=m
CONFIG_USB_F_MASS_STORAGE=m
CONFIG_USB_F_ACM=m
CONFIG_USB_F_SERIAL=m
CONFIG_USB_CONFIGFS=m
CONFIG_USB_CONFIGFS_NCM=y
CONFIG_USB_CONFIGFS_ECM=y
CONFIG_USB_CONFIGFS_RNDIS=y
CONFIG_USB_CONFIGFS_MASS_STORAGE=y
CONFIG_USB_U_SERIAL=m
CONFIG_USB_ZERO=m
CONFIG_USB_ETH=m
CONFIG_USB_ETH_RNDIS=y
CONFIG_USB_G_NCM=m
CONFIG_USB_G_SERIAL=m
CONFIG_USB_GADGETFS=m
CONFIG_USB_MASS_STORAGE=m
CONFIG_CONFIGFS_FS=y
# CONFIG_USB_CONFIGFS_F_PRINTER is not set
# CONFIG_USB_CONFIGFS_F_UVC is not set
# CONFIG_USB_CONFIGFS_F_HID is not set
# CONFIG_USB_CONFIGFS_F_FS is not set
# CONFIG_USB_CONFIGFS_F_LB_SS is not set
# CONFIG_USB_CONFIGFS_EEM is not set
# CONFIG_USB_CONFIGFS_ECM_SUBSET is not set
# CONFIG_USB_CONFIGFS_OBEX is not set
# CONFIG_USB_CONFIGFS_ACM is not set
# CONFIG_USB_CONFIGFS_SERIAL is not set
# CONFIG_FSL_UTP is not set
# CONFIG_USB_ETH_EEM is not set
EOT
cd linux/kernel
scripts/kconfig/merge_config.sh -m .config ../../gadget_config
cd ../..

Enable Mass Storage gadget (Ubuntu and Windows is supported)

1. boot your develop board and connect micro usb to PC
2. copy setup_mass.sh to develop board
3. If you want to use device as medium
   insert sdcard to develop board and it will be /dev/mmcblk1

   ./setup_mass.sh /dev/mmcblk1
   

4. If you want to use file as medium:
   run below command to create vfat image file in your PC

   dd if=/dev/zero of=fdev count=100 bs=1M
   mkfs.vfat fdev
   

   copy fdev file to same folder with setup_mass.sh of develop board and run ...

   ./setup_mass.sh fdev
   

   
   
5. Result
   
   

Enable communication device class gadget (ECM)

1. boot your develop board and connect micro usb to PC

2. copy setup_ecm.sh to develop board

3. setup Host (untuntu 14, Windows doesn't yet support) network connections
   3.1 run 'nm-connection-editor' and Press "Add" in network connections
   
   
   
   3.2 Choose Enternet
   
   
   
   3.3 Set connection name and MAC address
   
   
   
   3.4 Set IP
   
   
   
   3.5 New network connection (usb0) will create
   
   

4. run setup_ecm.sh

5. Result
   
   

Enable communication device class gadget (NCM)

1. boot your develop board and connect micro usb to PC
2. copy setup_ncm.sh to develop board
3. run setup_ncm.sh
4. setup host (Window 10)
   4.1 Update driver
   
   
   
   
   
   
   
   
   
   
   
   
   \

4.2 Setup ip
4.2.1 Click right button on Usb_Ncm device


4.2.2 Open device and set ip


4.2.3 Disable firewall for USB Ncm gadget


5. setup host (Ubuntu)
Please refer to ECM setting

6. Result

Enable ECM + ACM (need 2 OTG port)

1. boot your develop board and connect micro usb to PC
2. copy setup_ecm_acm.sh to develop board
3. run setup_ecm_acm.sh