RTEMS Class example Timer : strange behaviour (to me)

[pierre kestener]

Hello,

The problem can be reproduced using the Sparc/SIS simulator target
with the latest CVS sources and the 4.10 toolchain. However the problem 
disappears
when falling back to RTEMS version 4.9.

Can someone confirm he has the same wrong output as me for this test 
using the SIS target ?
Wrong output of timer class example (withthe only modification to have a 
print_time following each LED print) :
*** LED BLINKER -- timer ***
LED OFF 00:00:01
LED ON 00:00:02
LED OFF 00:00:03
LED ON 00:00:05
LED OFF 00:00:07
LED ON 00:00:09
LED OFF 00:00:11
LED ON 00:00:13
LED OFF 00:00:15
LED ON 00:00:17

The first LED_ON is missing.
Moreover it looks like after a while, the 2 timers are "sequentialized" 
instead of interleaved.

Pierre Kestener.


pierre kestener a écrit :
> More about timer example problem in Leon2 BSP :
>
> I have tried different couples RTEMS toochain / RTEMS src :
> - 4.9.0 from rtems.org
> - RCC 1.1.1 from Gaisler (RTEMS scr 4.8)
> - RCC 1.1.99.1 from Gaisler (downloaded in Feb 2009)
> - RCC 1.1.99.3 from Gaisler (downloaded today)
>
> the problem described below only appears with the latest Gaisler 
> toolchain/src 1.1.99.x
>
> everything is fine when using the release toolchain/src 4.9.0 (from 
> rtems.org) or with the older Gaisler toolchain/src couple.
>
> I haven't tried a more recent toolchain/src neither the CVS sources.
>
> Pierre.
>
> pierre kestener a écrit :
>> Hello,
>>
>> I am running the timer class example on real hardware (Sparc/Leon2) 
>> with printing on console.
>>
>> Timer1 and 2 service routines are each set with a 2 seconds interval, 
>> but I noticed that
>> after 2 fireouts, time between 2 LED_ON (or LED OFF)  prints becomes 
>> 4 seconds.
>> To illustrate this, I put a rtems_time_of_day  global variable named 
>> "now" in the source code to use it to print time.
>>
>> Here is the corresponding output :
>>
>> *** LED BLINKER -- timer ***
>> LED ON  00:00:00   
>> 01/01/2009                                                  LED OFF  
>> 00:00:01   01/01/2009                                                 
>> LED ON  00:00:02   
>> 01/01/2009                                                  LED OFF  
>> 00:00:03   01/01/2009                                                 
>> LED ON  00:00:05   
>> 01/01/2009                                                  LED OFF  
>> 00:00:07   01/01/2009                                                 
>> LED ON  00:00:09   
>> 01/01/2009                                                  LED OFF  
>> 00:00:11   01/01/2009                                                 
>> LED ON  00:00:13   
>> 01/01/2009                                                  LED OFF  
>> 00:00:15   01/01/2009                                                 
>> LED ON  00:00:17   01/01/2009
>>
>> I also noticed that if I comment the line calling Timer2 service routine
>> Timer_Routine(Timer2, NULL);
>> in the Init task, then Timer1 is called twice and then it stops, no 
>> print anymore.
>>                    *** LED BLINKER -- timer ***
>> LED ON  00:00:00   
>> 01/01/2009                                                  LED ON  
>> 00:00:02   01/01/2009                                                
>> Can someone help me and give some explanation of what seems strange 
>> to me ?
>> Thank you in advance.
>>
>> Pierre Kestener.
>>
>