How to build applications for uClinux

- Using Altera NIOS II IDE 5.0. How to build applications for uClinux on Stratix II (EP2S60_ES). What are these steps ?

A: Follow the Application Tasks section in the reference guide...

- How about building without NIOS II IDE 5.0, use what tool ?

A: After creating the initial Application Project, you can use the Nios II SDK Shell,

cd $ECLIPSE_WORKSPACE/<project>

and run make from there.

- How to write own driver for uClinux on Stratix II (EP2S60_ES). ?

A: Writing a driver for uClinux is the same as writing a driver for any Linux distribution, please take a look online for good documentation. It&#39;s there.

The kernel source can be found through the Nios II SDK shell using the following command:

cd $KERNEL_PLUGIN/linux-2.6.x

- from the Microtronix&#39;s Distribution. How to re-compile the kernel for Stratix II (EP2S60_ES) ?

A: If the Quick Start Guide doesn&#39;t answer that question then you&#39;ll need to be more specific. Are you using a different hardware design that you need to compile a kernel for?

Dear Ken !

thank you very much for your answer !

Please help me this problem:

We are using altera cyclone1c12 eval (using on-board Flash chip)...., NIOS IDE 5.0

How to write a file When running a C application in uClinux ?

fp=fopen(myfile,"r") works well but an error occurs when I use fp=fopen(myfile,"w")

Please follow the link to see the images :

problem image (http://img.photobucket.com/albums/v604/bebechance/problem.jpg)

http://img.photobucket.com/albums/v604/bebechance/problem.jpg

There are 2 possible problems for this error :

1. linux_time_limited.sof doesn’t support writing file

2. The program is running on sdram but the file (output_filename) is written to Flash. We already knew that we cannot write to Flash by C functions such as fprintf ,fwrite ,…. To do that , we must use some scripts : nios2-flash-programmer , ……

Is this related to RO readonly.....?

If it is the reason , then the uClinux FileSystem is useless.

What do you think ?

Hi OneNet,

there is one more explanation to your problem, which seems to be the most possible :

3. Your filesystem is readonly. If you want a r/w filesystem you can use ramfs (volatile, in ram) or jffs2 (non-volatile, in flash). If you use the default filesystem delivered with Microtronix distribution, you probably have some part of the system mounted as ramfs (/var and /tmp I think, check by executing mount without option to see what is mounted and where). You should try to create you r/w file in one of those directories, it should work.

Hope it helps

Pod

Dear cetic !

I&#39;m trying your way. I could create a new folder in /var successfully.Hopefully, your answer is helpful for anyone who is having this problem.

Thank you very much !