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both developed and submitted by Li Zhouy (Lzzy)).
See the Changelog for additional changes included in this release.
+
+NuttX-6.9
+^^^^^^^^^
+
+The 76th release of NuttX, Version 6.8, was made on September 11, 2011
+and is available for download from the SourceForge website. Note
+that release consists of two tarballs: nuttx-6.9.tar.gz and
+apps-6.9.tar.gz. Both may be needed (see the top-level nuttx/README.txt
+file for build information).
+
+This release includes a few new features and several important bug fixes.
+The new features (some still incomplete) include:
+
+ * Analog Support/ NXP LPC17xx: New DAC sub-system including ADC and DAC
+ drivers for the LPC17xx. Extensions to the ADS1255 driver.
+ (Contributed by Li Zhuoyi (Lzyy))
+
+ * Power Management: Added a new NuttX power management sub-system for
+ controlling and coordinating reduced power states. At present, only
+ verified in a simulation environment.
+
+ * I2C Test Tool: A new application was added that can be used to
+ verify and debug I2C interfaces from the NuttShell (NSH) command
+ line.
+
+ * NuttShell (NSH): In addition to the I2C test tool, a date command
+ is now supported (if CONFIG_RTC is defined) that can be used to
+ read and set the RTC.
+
+ * NXP LPC17xx: I2C and DAC driver for the NXP LPC17xx family submitted by Li Zhuoyi
+ (Lzyy)
+
+ * Kinetis Cortex-M4: Added a SDHC driver for the Kinetis parts.
+ Complete debug of the Kinetis SDHC driver was not completed, however,
+ do to some higher priority tasks that forced me to stop work.
+
+ * Other new drivers: Driver for I2C-based at24cxx EEPROM submitted by
+ Li Zhuoyi (Lzyy); Driver for the LM-75 temperature sensor. Support
+ for the LM-75 temperature sensor integrated into the SM3210E-EVAL
+ development board.
+
+ * NuttX Graphics (NX): Added new NX interfaces for drawing circles,
+ both circle outlines and filled circles.
+
+ * FLASH: Added a function that accepts the path to a block driver and
+ then erases the underlying FLASH memory
+
+ * Build System: The Make export logic now also tries to track down all
+ architecture-specific header files and include these in the NuttX
+ export bundle as well. Various changes and modifications so that
+ NuttX wil build on FreeBSD using the ASH shell (submitted by Kurt Lidl).
+
+Bugfixes, order roughly on decreasing criticality include:
+
+ * STM32 I2C Driver: Add resets, timeout, and other fixes to work
+ reliably with the I2C tool. Corrected a major error introduced in
+ NuttX 6.8.
+
+ * BCH Driver. Several important bugs (noted by Li Zhuoyi (Lzyy))
+ were fixed.
+
+ * C Library: Fixed errors in gmtime() and gmtime_r() that could lead to
+ errors in date calculations.
+
+ * Timing: Correct an error in the tv_nsec calculation that happens
+ only config CONFIG_RTC is enabled
+
+ * Build System: Use of -print-libgcc-file-name to get path to
+ libgcc.a might select the wrong libgcc.a if a multilib toolchain
+ is used