Write/Read file to Compact Flash

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originally posted by zcao@Aug 30 2005, 03:31 PM

hello:

i am a software newb trying to get my hands on a program that writes and reads a file to and from the compact flash on a cyclone board using nios ii ide. i have gotten the the hardware part and the software part to run for the "compact flash monitor/debug demonstration program" under the ip section of this website. in a readme file there is description how there is additional support for the compact flash in the ecos release for NIOS II 5.0, and Micrium MicroC/FS file system.[/b] I am unfamiliar with ecos or micrium, and I assume they are operating systems? Could someone explain what they are, and what I need to execute to get them working for my board?

JC

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[/b]

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Hello,

I am at the same problem. If you have found out a solution, could you tell me something? I will do the same for you,

JP

I could suggest the best solution to your problem is "Work on Linux, and build nios2 uClinux". There is nothing to fear about Linux. I had been a DOS/WIndows user long a ago. But Linux is very easy to use and understand. You can learn so much from GNU/Linux, those are close to what we study in school.

Try add a PC to run Linux. Try http://www.ubuntulinux.org/ (http://www.ubuntulinux.org/) or others.

You can develop hardware using quartus and nios2 on Windows. Then develop software on Linux. Follow this link to build tools/kernel/apps on Linux.

http://forum.niosforum.com/forum/index.php?showtopic=3174 (http://forum.niosforum.com/forum/index.php?showtopic=3174)

Thank you. I will try this. But then, how can I read the files from the CF card? I am not accostumed to use Linux...

JP

With proper drivers configured, the kernel will detect the CF drive&#39;s partitions. You will use "mount" command to map the file system on the CF drive to a dir. Then you can access CF&#39;s data under that mount dir.

eg, you have FAT16 formatted the partition 1 of the CF drive, it will become /dev/hda1 .

Then "mount -t vfat /dev/hda1 /mnt" will map the CF drive to dir /mnt . After you have finished the access, "umount /mnt" will unmap the CF drive.

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originally posted by zcao@Aug 30 2005, 03:31 PM

hello:

I am unfamiliar with ecos or micrium, and I assume they are operating systems? Could someone explain what they are, and what I need to execute to get them working for my board?

JC

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=9424)

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[/b]

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Hi JC,

ecos and Micro-C/OS-II are simple, small-footprint multitasking RTOSes. Mircrium is the company that distributes Micro-C/OS-II. I don&#39;t know that much about ecos but uC/OS-II is a very small OS that&#39;s easy to port. You can&#39;t really compare it to Linux, it has much fewer features and drivers but on the flipside you can run it on tiny processors, really depends on what you&#39;re after.

We have the full version of NIOS so it&#39;s just a matter of selecting the uc/OS-II option when setting up the project in the IDE. I&#39;m not sure if the lesser versions of NIOS allow that as well but probably they do.

Andrew