Prep for release 0.3.16

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1027 42af7a65-404d-4744-a932-0658087f49c3

ReleaseNotes

@@ -587,6 +587,45 @@ any errors to me.
 
 This tarball contains a complete CVS snapshot from September 20, 2008.
 
-
+nutt-0.3.16
+^^^^^^^^^^^
+
+This is the 28th release of NuttX.  This release includes the first support for
+USB in NuttX.  A set of USB APIs were added to support USB device controller
+drivers and bindings to USB device class drivers.  The form of the interface
+was inspired by the Linux Gadget APIs.
+
+At present USB device controller drivers are included for:
+
+  * The NXP LPC214x.  This driver has been verified and is an early alpha
+    stage in quality.
+  * TI DM320.  Coding for this driver is complete but it is completely untested
+    as of this release.
+
+A controller-independent class driver is also included for:
+
+  * USB serial class device driver (emulates the Prolific PL2303 serial-to-USB
+    adaptor).  This drver has only been verified with the Linux host PL2303
+    driver.
+
+Other new features include:
+
+  * Add an option to set aside a separate stack for interrupt handling (ARM only).
+    This is useful when memory is constrained, there are multiple tasks, and
+    the interrupt stack requirement is high (as when USB is enabled).
+
+A few bugs were also fixed:
+
+  * Fixed the frequency of system timer interrupts in the NXP LPC214x port
+    (off by 20x in nuttx-0.3.15)
+  * Fixed serial driver bugs related to (1) open counts and (2) recognizing
+    O_NONBLOCK on read.
+  * Fixed an error in read(); it was not setting the errno on errors returned
+    from the driver.
+
+These changes were verified only on the mcu123.com NXP LPC2148 board using with
+a Linux host.  Please report any errors to me.
+
+This tarball contains a complete CVS snapshot from Octobor 10, 2008.