Re: [microblaze-uclinux] Problem when building application

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hello Eli,

Eli Zarka wrote:

> hello.elf2flt: In function `SlaveReadWrite':
> 
> /cygdrive/c/akivas/ucLinux/application/hello.c(.text+0x374): undefined
> reference
> 
>  to `request_irq'
> 

request_irq() is a kernel function, and may not be called by user
applications.  Only device drivers may register interrupt handlers.

You will need at least a simple device driver to capture the IRQ,
implementing either (or both) read() or poll() file operations.

Then, your application would open the device, and perform a blocking
read(), or poll() on that device.

Check out the Linux Device Drivers book (2nd edition) by Corbet and
Rubini - the PDF is available for free online.

Regards,

John


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