Newer
Older
development board's display and MicroSD support. An SPI driver and a DMA support was included
This tarball contains a complete CVS snapshot from October 17, 2009
nuttx-0.4.13
^^^^^^^^^^^^
This is the 45th release of NuttX. The release extends the support for the STMicro
STM32 microcontroller. Minimal support for the STM3210E-EVAL development board based
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around the STM32F103ZET6 MCU was released in NuttX-0.4.12. This release adds:
* A simple interface definition to support some FLASH, EEPROM, NVRAM, etc. devices.
* Verified SPI operation using driver for SPI based FLASH parts M25P64 and M25P128.
* Improved Cortex-M3 context switching. This should improve context switching
performance be 2x in certain cases.
* Added a USB device-side driver for the STM32. This is an early release of a
very complex driver; some bugs are expected.
* The USB driver has been verified against the USB serial device class driver.
There is at least one known outstanding issue (see the full bug description in
the TODO list).
This release also corrects some important bugs in the early STM32 release:
* Fixed several errors the prevented operation of NuttX on an STM32 development
board using USART2 as the serial console.
* Fixed and optimization-dependent race condition in the clock initialization.
* Fixed a critical bug in the interrupt control logic that could cause interrupt
operations to failed used for interrupts in a certain range.
This tarball contains a complete CVS snapshot from November 4, 2009
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nuttx-4.14
^^^^^^^^^^
This is the 46th release of NuttX. The release extends the support for the STMicro
STM32 microcontroller. Minimal support for the STM3210E-EVAL development board based
around the STM32F103ZET6 MCU was released in NuttX-0.4.12 and extended in Nuttx-0.4.13
to include initial USB support. This completes the STM32F103ZET6 and adds:
New Generic RTOS Features:
* Added generic support that can be included in any block driver to provide
read-ahead buffering and write buffering for improved driver performance.
* Added a generic worker thread that can used to defer processing from an
interrupt to a task.
* Defined a generic SD/SDIO interface can can be bound to a MMC/SD or SDIO
driver to orovide SDIO support.
* Implemented a an SDIO-based MMC/SD driver using this new SDIO interface
New STM32 Features:
* Add support to configure an STM32 input GPIO to generate an EXTI interrupt.
* Added support for buttons on the STM3210E-EVAL board.
* Implemented an STM32 version of the common the SDIO interface.
* Added a configuration to exercise the STM32 with the USB mass storage
device class example.
This release also corrects some important bugs in the early STM32 release:
* Correct error handling in the mount() logic.
* Fixed several STM32 DMA-related issues. Integrated and debugged STM32 DMA
functionality that was added in 0.4.12.
* Fixed several bugs in the STM32 USB device-side driver.
NOTE: This version, 4.14, is equivalent to what would have been called 0.4.14
to follow 0.4.13. The zero has been eliminated from the front of the version
number to avoid confusion about the state of development: Some have interpreted
the leading zero to mean that the code is in some way unstable. That was not
the intent. Beginning in January 2010, I will switch to the 2010.nn versioning
as many others have done to avoid such confusion.
This tarball contains a complete CVS snapshot from December 2, 2009