matrix_df hotmail wrote:
> Hello
>
>> Your build must have become inconsistent in some way. Are you sure that
>> the latest RTnet modules are installed on the master, not accidentally
>> some older ones?
>
> I am sure, but I will double check.
>
> When I use your test program it works:
>
> -----------------------------------------------------
> #include <stdio.h>
> #include <sys/mman.h>
> #include <native/task.h>
> #include <rtnet.h>
> #include <rtmac.h>
>
> main()
> {
> int i, fd, err;
> RT_TASK task;
>
> mlockall(MCL_CURRENT | MCL_FUTURE);
>
> fd = rt_dev_open("TDMA0", O_RDWR);
> printf("open = %d\n", fd);
>
> rt_task_shadow(&task, "waitonsync", 1, 0);
>
> for (i=0; i < 100; i++) {
> err = rt_dev_ioctl(fd, RTMAC_RTIOC_WAITONCYCLE,
> TDMA_WAIT_ON_SYNC);
> if (err)
> printf("TDMA_WAIT_ON_SYNC = %d\n", err);
> }
> printf("done\n");
> rt_dev_close(fd);
> }
> ---------------------------------------------------------------
>
> BUT when I remove the lines with
> mlockall(MCL_CURRENT | MCL_FUTURE);
> and
> rt_task_shadow(&task, "waitonsync", 1, 0);
> it FAILS with error=-13:Argh: "When I pull the plug, my TV doesn't work. Is it broken?" ;) Both lines above are essential. The first one makes sure your application's memory will remain physically present and not swapped away e.g. The second one turns the main thread of this program into a Xenomai thread, and this is required to block on an event out of the real-time domain like the arrival of a TDMA SYNC frame. But if you have a demo code that doesn't work while the above example does, please post it. Jan
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