Re: How to run '"hello"

Altera_Forum · ‎06-04-2006

Dir all,

According to this netpage:

http://nioswiki.jot.com/wikihome/operating...duleprogarmming (http://nioswiki.jot.com/wikihome/operatingsystems/moduleprogarmming)

I made a zImage and download to my cumstom bord.

When boot linux,I can see:"Hello, world\",but can not see "Goodbye, cruel world\".

Why?

How can I run the program in nios2-terminal when I have download the zImage?

Altera_Forum · ‎06-04-2006

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originally posted by nwpu_zhf2004@Jun 4 2006, 07:46 PM

dir all,

according to this netpage:

http://nioswiki.jot.com/wikihome/operating...duleprogarmming (http://nioswiki.jot.com/wikihome/operatingsystems/moduleprogarmming)

i made a zimage and download to my cumstom bord.

when boot linux,i can see:"hello, world\",but can not see "goodbye, cruel world\".

why?

how can i run the program in nios2-terminal when i have download the zimage?

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15869)

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You need to unload the module, ie, rmmod hello .

You need to enable "module unloading" in kernel config.

And enable "rmmod" in busybox.

But please note, this is kernel programming, not user apps. You should use this mostly for drivers.

For general (user) apps,

http://nioswiki.jot.com/wikihome/operating...ms/compilehello (http://nioswiki.jot.com/wikihome/operatingsystems/compilehello)

Altera_Forum · ‎06-04-2006

<div class='quotetop'>QUOTE </div>

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You need to unload the module, ie, rmmod hello .

You need to enable "module unloading" in kernel config.

And enable "rmmod" in busybox.

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Dear hippo,

According to your advice,after exute "make" instruction,"zImage" is buiilded.

Then I exute "make romfs".

Then I exute "make linux zImage",just like the fllowing:

I do not know wether "zImage" is right?

$ make linux zImage
make ARCH=nios2nommu CROSS_COMPILE=nios2-linux-uclibc-  ARCH=nios2nommu CROSS_COMPILE=nios2-linux-uclibc- -C linux-2.6.x zImage || exit 1
  no emulation specific options.
make: Entering directory `/home/wangzhiwunpu/uClinux-dist-test/linux-2.6.x&#39;
  CHK     include/nios2_system.h
  CHK     include/linux/version.h
  CHK     include/linux/compile.h
  CHK     usr/initramfs_list
  OBJCOPY arch/nios2nommu/boot/zImage
Kernel: arch/nios2nommu/boot/zImage is ready
make: Leaving directory `/home/wangzhiwunpu/uClinux-dist-test/linux-2.6.x&#39;
if ; then 
        ln -f linux-2.6.x/vmlinux linux-2.6.x/linux; 
fi
make: *** No rule to make target `zImage&#39;.  Stop.
$
-------------------------------------------/COLOR]

When I download "zImage" to my custom board,exute the instrution "modprobe mytest",the information "mytest : applet not found".

Whould you please tell me steps of "how to do a simple drive" ?

Altera_Forum · ‎06-04-2006

the last make should be "make linux image", not "zImage", because we are in uClinux-dist-test.

make linux will build zImage.

make image will put zImage in images/zImage.

I have updated the wiki.

But it still has problem in modprobe, which may be a bug in the old busybox.

I will check the problem later.

For now, you can do it without modules, and build directly in kernel,

ie,

<*> example hello module

There is an example driver in Chinese from Alex.liu,

http://www.icwin.net/showartitle.asp?art_id=8452&cat_id=52 (http://www.icwin.net/showartitle.asp?art_id=8452&cat_id=52)

Altera_Forum · ‎08-29-2006

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When I download "zImage" to my custom board,exute the instrution "modprobe mytest",the information "mytest : applet not found".

i have the same problem when try the example described in "http://nioswiki.jot.com/WikiHome/OperatingSystems/ModuleProgarmming"

has anyone resolved the problem?

Altera_Forum · ‎09-01-2006

hippo you are good