announce: UFFS for Kinetis ARM

[bowerymarc]

Hi,

I just wanted to announce here, it's in a fully working but probably a bit rough stage, is a port of UFFS 1.3.6 to run on the TWR-K60F120M Freescale development board.  I wrote some shim layers and a simple driver for the NAND flash controller, the Kinetis has a pretty fancy controller built into it.  Also in the demo are routines to copy files between a FAT SD card and NAND flash.

I hope the community can contribute and improve this port.  It's posted over in Erich Styger's github, as it depends on many of his Processor Expert components.

https://github.com/ErichStyger/mcuoneclipse/tree/master/Examples/TWR-K60F120M/TWR-K60F120M_FatFS_UFFS

Enjoy!
Marc

[Ricky Zheng]

Thanks for the sharing !

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[Sergei Sharonov]

On Sunday, March 16, 2014 at 3:43:56 PM UTC-5, bowerymarc wrote:

Hi,

I just wanted to announce here, it's in a fully working but probably a bit rough stage, is a port of UFFS 1.3.6 to run on the TWR-K60F120M Freescale development board.  

Thank you for sharing. 

......

I hope the community can contribute and improve this port.

In uffs_os.c you create binary semaphore but posix example shows mutex. AFAIK filesystems normally use mutexes, not simple binary semaphores. Priority inversion and whatnot.

Was there a specific reason you chose binary?

Regards,

Sergei 

[Marc Lindahl]

Hi Sergei,

In fact a mutex might be better.  For the project I had, it made no difference, as only one FreeRTOS thread was accessing the filesystem.  I think at the time, when I was also learning how UFFS interacted with FreeRTOS and various Kinetis PDD’s etc, I was thinking I might need to support the semaphore from an ISR, but it turned out not.  Should be an easy mod - I think you just change the creation to xSemaphoreCreateMutex.

Thanks,

Marc

https://github.com/bowerymarc/kinetis-uffs