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Altera_Forum's avatar
Altera_Forum
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20 years ago

How can i handle the pio in uclinux?

I have upload the kernal and filesystem to flash,and the kernal runs very well.Then i build the example 'hello world',it runs very well too. Now i want to handle the PIO in uclinux,like...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

In the header file...../bin/eclipse/plugins/com.microtronix.nios2linux.kernel_1.4.0/linux-2.6.x/include/asm-nios2nommu/io.h

There are # define writew(b,addr)

({

__asm__ __volatile__(

"sthio %0, 0(%1)"

: : "r"(http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/cool.gif , "r" (addr));

})

and other application like this.But in my Application Project,when i use writew or other application that has defined in the io.h,there are error undefined reference to `writew&#39;,I have include the header file like this# <asm/io.h>.Can anyone tell me why.

Thanks. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif