Add examples/usbterm

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3976 42af7a65-404d-4744-a932-0658087f49c3

configs/stm3210e-eval/README.txt

@@ -631,6 +631,16 @@ Where <subdir> is one of the following:
     -CONFIG_CDCSER=n
     +CONFIG_CDCSER=y
 
+    The example can also be converted to use the alternative
+    USB serial example at apps/examples/usbterm by changing the 
+    following:
+
+    -CONFIGURED_APPS += examples/usbserial
+    +CONFIGURED_APPS += examples/usbterm
+
+    In either the original appconfig file (before configuring)
+    or in the final apps/.config file (after configuring).
+
   usbstorage:
   ----------
     This configuration directory exercises the USB mass storage

configs/stm3210e-eval/usbserial/defconfig

@@ -884,6 +884,34 @@ CONFIG_EXAMPLES_USBSERIAL_TRACETRANSFERS=n
 CONFIG_EXAMPLES_USBSERIAL_TRACECONTROLLER=n
 CONFIG_EXAMPLES_USBSERIAL_TRACEINTERRUPTS=n
 
+#
+# Settings for examples/usbterm
+#
+# CONFIG_EXAMPLES_UBSTERM_BUILTIN - Build the usbterm example as an NSH
+#   built-in command.  NOTE:  This is not fully functional as of this
+#   writing.. It should work, but there is no mechanism in place yet
+#   to exit the USB terminal program and return to NSH.
+# CONFIG_EXAMPLES_USBTERM_BUFLEN - The size of the input and output
+#   buffers used for receiving data. Default 256 bytes.
+#
+# If CONFIG_USBDEV_TRACE is enabled (or CONFIG_DEBUG and CONFIG_DEBUG_USB, or
+# CONFIG_USBDEV_TRACE), then the example code will also manage the USB trace
+# output.  The amount of trace output can be controlled using:
+#
+# CONFIG_EXAMPLES_USBTERM_TRACEINIT - Show initialization events
+# CONFIG_EXAMPLES_USBTERM_TRACECLASS - Show class driver events
+# CONFIG_EXAMPLES_USBTERM_TRACETRANSFERS - Show data transfer events
+# CONFIG_EXAMPLES_USBTERM_TRACECONTROLLER - Show controller events
+# CONFIG_EXAMPLES_USBTERM_TRACEINTERRUPTS - Show interrupt-related events
+#
+CONFIG_EXAMPLES_UBSTERM_BUILTIN=n
+CONFIG_EXAMPLES_USBTERM_BUFLEN=256
+CONFIG_EXAMPLES_USBTERM_TRACEINIT=n
+CONFIG_EXAMPLES_USBTERM_TRACECLASS=n
+CONFIG_EXAMPLES_USBTERM_TRACETRANSFERS=n
+CONFIG_EXAMPLES_USBTERM_TRACECONTROLLER=n
+CONFIG_EXAMPLES_USBTERM_TRACEINTERRUPTS=n
+
 #
 # Stack and heap information
 #

drivers/usbdev/cdc_serial.c

@@ -2170,7 +2170,20 @@ static int usbser_ioctl(FAR struct file *filep,int cmd,unsigned long arg)
     case CAIOC_NOTIFY:
       {
         /* Not yet implemented.  I probably won't bother to implement until
-         * I com up with a usage model that needs it.
+         * I comr up with a usage model that needs it.
+         *
+         * Here is what the needs to be done:
+         *
+         * 1. Format and send a request header with:
+         *
+         *   bmRequestType:
+         *    USB_REQ_DIR_IN|USB_REQ_TYPE_CLASS|USB_REQ_RECIPIENT_INTERFACE
+         *   bRequest: ACM_SERIAL_STATE
+         *   wValue: 0
+         *   wIndex: 0
+         *   wLength: Length of data
+         *
+         * 2. Followed by the notification data (in a separate packet)
          */
 
         ret = -ENOSYS;