Documentation/ReleaseNotes/NuttX-0.3.16

NuttX-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 adapter). This driver 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 October 10, 2008.

UPDATE
------
This release does not build for the ARM target when USB is disabled.
Here is the fix:

Index: arch/arm/src/common/up_internal.h
===================================================================
RCS file: /cvsroot/nuttx/nuttx/arch/arm/src/common/up_internal.h,v
retrieving revision 1.13
diff -u -r1.13 up_internal.h
--- arch/arm/src/common/up_internal.h 6 Oct 2008 16:20:52 -0000 1.13
+++ arch/arm/src/common/up_internal.h 13 Oct 2008 20:48:21 -0000
@@ -200,7 +200,8 @@
extern void up_usbinitialize(void);
extern void up_usbuninitialize(void);
#else
-# define up_netinitialize()
+# define up_usbinitialize()
+# define up_usbuninitialize()
#endif

#endif /* __ASSEMBLY__ */