NavCom Sapphire Rev.J - Manual (Page 238)

Sapphire Technical Reference Manual Rev. J
238

When the USB is in OTG DEVICE mode and the user enters the c ommand “[USBMODE]
device”, the receiver returns the current mode: OTG DEVICE : xx, where “xx” is either
“COM_PORT” or “MASS_STORAGE”.

When the USB is in OTG DEVICE mode and the user enters the command “[USBMODE]
host”, the receiver returns the current mode: OTG DEVICE : xx, where “xx” is either
“COM_PORT” or “MASS_STORAGE”.

When the USB is in OTG DEVICE:COM_PORT mode and the user enters the command
“[USBMODE] device, mass_storage”, the receiver changes the current mode to mass
storage device mode.

When USB is in OTG DEVICE:MASS_STORAGE mode, user enters command
“[USBMODE] device, com_port”, the receiver will change current mode to virtual com port
mode.
 When USB is in OTG HOST mode, user enters command “[USBMODE] device,
mass_
storage”, the receiver will remember the mass storage for the device mode. Once
user changes USB cable to device cable, the mass storage device mode will be engaged.

When the USB is in OTG HOST mode and the user enters the command “[USBMODE]
device, com_
port”, the receiver remembers the com port for the device mode. Once the user
changes USB cable to Device cable, the virtual com port mode is engaged.
Only the following [USBMODE] commands can be saved in a user profile:
[USBMODE]device,com_port
[USBMODE]device,mass_storage

Issuing a “[USBMODE] DEVICE, MASS_STORAGE” command through the USB
port will result in a COMMAND FAILED error message, since executing the
command would result in disconnecting the USB port.

Changing the USB mode from COM port to mass storage device mode when the
USB port is open in StarUtil 3000 will result in connection difficulty when the USB
mode is changed back to COM port mode. If this happens, the receiver has to be
power cycled, or StarUtil 3000 restarted to recover. The best practice is to first
close the USB port from StarUtil 3000 and then use the [USBMODE] command to
change to USB mode.