On Mon, Oct 15, 2012 at 04:23:59PM +0530, Niroj Pokhrel wrote:
Thank Matthias!!! I have tried using printk . What I really want to do now is to implement the methods I have written by calling from the user space. Like I want to read or write to the character devices via user space.
Did you register your callbacks for read and write in your char driver ? If yes, then you can write and read(given you have methods for write and read for your char driver), through 'echo', 'cat' etc of your char device through fs nodes(under /dev). I'm guessing that you've exported your device under /dev file system. -Amit
On Mon, Oct 15, 2012 at 3:49 PM, Matthias Brugger < matthias.bgg@googlemail.com> wrote:
Hi,
On 10/15/2012 11:24 AM, Niroj Pokhrel wrote:
Hi, I'm new to linux and kernel . I'm ongoing with the linux device drivers. I've followed the the book LDD but i'm lost about how to call my driver's specific method from the user space. Eg: if have developed a character device and inserted the module then how can i make sure that when I read or write that it implement the functions via the methods i have implemented in my module.
the most easy way would be to put some printk output in your read/write functions of your driver. So with cat/echo from userspace you should be able to verify your implementation.
Regards, Matthias