[rtems] multitasking problem

[Joel Sherrill]

"Aaron J. Grier" wrote:
> 
> On Fri, Oct 12, 2001 at 10:49:06AM +0200, Stan wrote:
> 
> > On my board, the sample apllication 'hello word' running well.  But
> > the 'clock tick' application not executing properly ;)
> >
> > rtems_task_create and rtems_task_start return RTEMS_SUCCESS but in
> > rtems_task_delete, the User_extensions_thread_begin abort.
> >
> > The workspace size and program heap size appears well.
> >
> > How to find origin this problem ?  any idea ?
> 
> > BSP: custom, based upon efi68k
> 
> sounds like you forgot to put in a clock interrupt, or your clock
> interrupt is not calling rtems_clock_tick.

Key questions often are:

  + Am I getting the 1st clock tick?
    Not initialized properly at all.
  + Am I getting the 2nd clock tick?
    ISR not resetting things right.
  + How far are they apart?
    Miscalculated timer count value.

> --
>   Aaron J. Grier  |   Frye Electronics, Tigard, OR   |  aaron at frye.com
>      "In a few thousand years people will be scratching their heads
>        wondering how on earth the first computer was invented and
>           bootstrapped without a prior computer to do it with."
>                     --  Chris Malcolm, on comp.arch

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
Support Available                (256) 722-9985