Re: [Xenomai-help] unable to open serial port from a kernel module

[Stefan Kisdaroczi <kisda@domain.hid>]

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Hi,

> int main ()
> {
>     mlockall (MCL_CURRENT|MCL_FUTURE);

you need to call rt_task_shadow(...) here (see docs),
which turns the current Linux task into a native Xenomai task.

>     rt_heap_bind  (&heap_desc, "MyHeap", TM_NONBLOCK);
>     rt_heap_alloc (&heap_desc, 1, TM_NONBLOCK, &shmem);

check all return values. I guess its -19 too without rt_task_shadow.

> /***************************************/
>     int result = rt_dev_open  ("rtdev0", 0);
> 
>     printf ("\n%d passed ", result);
> 
>     rt_dev_write (result, "abcd", 4);
> /***************************************/
> }

good luck,
kisda


Anisha Kaul schrieb:
> On Wednesday November 11 2009 14  : 49  : 19 you wrote:
>> Anisha Kaul wrote:
>>> hi,
>>>
>>> when i use rt_dev_open ("/dev/ttyS0", 0); from the function init_module
>>> () of a self written kernel module, it returns -19 ! What must be the
>>> reason, can't a file be opened from a kernel module ?
>> Please read documentation and examples more carefully: "rtdev0" is the
>> answer.
>>
>> Jan
> 
> Hi,
> 
> I forgot to attach the kernel module file as well as the user space file in 
> the previous mail. Hereby I have included both of them !
> 
> kernel module file: serialPortISR.c
> user space file   : userSpace.c
> 
> thanks,
> anisha
> 
> 
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