system/composite
^^^^^^^^^^^^^^^^^^
This logic adds a NXH command to control a USB composite device. The only
supported composite is CDC/ACM serial with a USB mass storage device.
Required overall configuration:
CONFIG_USBDEV=y - USB device support
CONFIG_USBDEV_COMPOSITE=y - USB composite device support
CONFIG_COMPOSITE_IAD=y - Interface associate descriptor needed
CONFIG_CDCACM=y - USB CDC/ACM serial device support
CONFIG_CDCACM_COMPOSITE=y - USB CDC/ACM serial composite device support
CONFIG_CDCACM_IFNOBASE=0 - CDC/ACM interfaces start with number 0
CONFIG_CDCACM_STRBASE=4 - Base of string numbers (not really needed)
CONFIG_CDCACM_EPINTIN=1 - Endpoint numbers must be unique
CONFIG_CDCACM_EPBULKIN=2
CONFIG_CDCACM_EPBULKOUT=3
CONFIG_USBMSC - USB mass storage device support
CONFIG_USBMSC_COMPOSITE=y - USB mass storage composite device support
CONFIG_USBMSC_IFNOBASE=2 - USB mass storage interfaces start with number 2
CONFIG_USBMSC_STRBASE=4 - Base of string numbers (needed)
CONFIG_USBMSC_EPBULKOUT=4 - Endpoint numbers must be unique
CONFIG_USBMSC_EPBULKIN=5
CONFIG_NSH_BUILTIN_APPS
This add-on can be built as two NSH "built-in" commands if this option
is selected: 'conn' will connect the USB composite device; 'msdis'
will disconnect the USB composite device.
Configuration options unique to this add-on:
CONFIG_SYSTEM_COMPOSITE_DEBUGMM
Enables some debug tests to check for memory usage and memory leaks.
CONFIG_SYSTEM_COMPOSITE_NLUNS
Defines the number of logical units (LUNs) exported by the USB storage
driver. Each LUN corresponds to one exported block driver (or partition
of a block driver). May be 1, 2, or 3. Default is 1.
CONFIG_SYSTEM_COMPOSITE_DEVMINOR1
The minor device number of the block driver for the first LUN. For
example, N in /dev/mmcsdN. Used for registering the block driver. Default
is zero.
CONFIG_SYSTEM_COMPOSITE_DEVPATH1
The full path to the registered block driver. Default is "/dev/mmcsd0"
CONFIG_SYSTEM_COMPOSITE_DEVMINOR2 and CONFIG_SYSTEM_COMPOSITE_DEVPATH2
Similar parameters that would have to be provided if CONFIG_SYSTEM_COMPOSITE_NLUNS
is 2 or 3. No defaults.
CONFIG_SYSTEM_COMPOSITE_DEVMINOR3 and CONFIG_SYSTEM_COMPOSITE_DEVPATH2
Similar parameters that would have to be provided if CONFIG_SYSTEM_COMPOSITE_NLUNS
is 3. No defaults.
CONFIG_SYSTEM_COMPOSITE_TTYUSB - The minor number of the USB serial device.
Default is zero (corresponding to /dev/ttyUSB0 or /dev/ttyACM0). Default is zero.
CCONFIG_SYSTEM_COMPOSITE_SERDEV - The string corresponding to
CONFIG_SYSTEM_COMPOSITE_TTYUSB. The default is "/dev/ttyUSB0" (for the PL2303
emulation) or "/dev/ttyACM0" (for the CDC/ACM serial device).
CONFIG_SYSTEM_COMPOSITE_BUFSIZE - The size of the serial I/O buffer in
bytes. Default 256 bytes.
If CONFIG_USBDEV_TRACE is enabled (or CONFIG_DEBUG and CONFIG_DEBUG_USB), then
the add-on code will also manage the USB trace output. The amount of trace output
can be controlled using:
CONFIG_SYSTEM_COMPOSITE_TRACEINIT
Show initialization events
CONFIG_SYSTEM_COMPOSITE_TRACECLASS
Show class driver events
CONFIG_SYSTEM_COMPOSITE_TRACETRANSFERS
Show data transfer events
CONFIG_SYSTEM_COMPOSITE_TRACECONTROLLER
Show controller events
CONFIG_SYSTEM_COMPOSITE_TRACEINTERRUPTS
Show interrupt-related events.
