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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

> there are error undefined reference to `writew',I have include the header file like

> this# <asm/io.h>.Can anyone tell me why.

__KERNEL__ must be defined. If you define this for an application, you&#39;ll likely pull in

other definitions that will cause compile-time problems. I recommend you copy the

macros you need into a header file in your application source tree. It&#39;ll probably save

you some headaches.

Regards,

--Scott