Three chip erc32 Re: CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER macro issue

[Jiri Gaisler]

On 9/3/19 9:14 AM, Jiri Gaisler wrote:
>
> Hmm, maybe clock driver code has been changed during the years to read
> or write some register bits that are illegal on the 3-chip ERC32. This
> would cause a trap to error mode and most likely a watchdog reset. I
> quickly looked through the ERC32 clock driver code but could not see
> anything obvious. It could also be an ERC32 interrupt driver issue -
> enabling interrupts seems to trigger the problem. I will try to run
> ticker on an old version of sis that did some more checks for the
> 3-chip version ...
>
Could not find any problems with the ERC32 ticker.exe binary on an older
sis, runs just fine.

One thing to look out for is the watchdog timeout. RTEMS does not touch
the watchdog, so if the board hardware or firmware does not disable the
watchdog, program that runs longer than a few seconds will be reset by
the watchdog. This would apply to ticker ...

Jiri.


> On 9/3/19 12:57 AM, Joel Sherrill wrote:
>> Jiri does this ring a bell with the old Tharsys board and 3 chip erc32?
>>
>> On Mon, Sep 2, 2019, 5:09 PM Michel Macena <mmacena.eng at gmail.com
>> <mailto:mmacena.eng at gmail.com>> wrote:
>>
>>     It is the ERC 32 chipset version (TSC691, TSC692 and TSC693
>>     units), The Board was manufactured by Tharsys, a french company,
>>     but it does not
>>     exist anymore. The board manual dates from 2000.
>>
>>     Em sex, 30 de ago de 2019 às 17:53, Joel Sherrill <joel at rtems.org
>>     <mailto:joel at rtems.org>> escreveu:
>>
>>
>>
>>         On Fri, Aug 30, 2019, 11:35 AM Michel Macena
>>         <mmacena.eng at gmail.com <mailto:mmacena.eng at gmail.com>> wrote:
>>
>>             Thanks for the answer, but the ticker sample program
>>             has this macro in his system.h header. I can compile a
>>             program
>>             with this macro but when  I load it, the board just
>>             ignores it an then reset. If I change the
>>             macro for the opposite one ("does not need the clock
>>             driver") the program just works, except that I can't
>>             use any time related routine. Also without the clock
>>             drive driver enabled I can't communicate with the board
>>             (send and receive data).
>>             I understand that the Macro enables the clock drive but
>>             how this happens ? It changes a register value  in the chip ?
>>
>>
>>         Setting that macro adds the clock driver to the set of
>>         statically installed device drivers. The code is in
>>         bsps/sparc/erc32/clock. It uses a timer on the erc32. 
>>
>>         Check that it survives initialising the clock and gets the
>>         interrupt ok.
>>
>>         This isn't something I have heard of before. Is this a very
>>         early erc32? Just wondering with nothing specific in mind. 
>>
>>         --joel
>>
>>
>>
>>             Em sex, 30 de ago de 2019 às 03:21, Sebastian Huber
>>             <sebastian.huber at embedded-brains.de
>>             <mailto:sebastian.huber at embedded-brains.de>> escreveu:
>>
>>                 On 30/08/2019 19:09, Michel Macena wrote:
>>                 > I still have the issue with the macro #define
>>                 > CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER. I tried
>>                 > a different version of RTEMS but It didn't work.
>>                 Can someone explain me
>>                 > how this macro works? So I can
>>                 > try to figure out some patch or fix for my hardware.
>>
>>                 This configuration option enables the clock driver.
>>
>>                 I would run first the RTEMS test suite on your
>>                 target. For example start
>>                 with the ticker sample program.
>>
>>                 -- 
>>                 Sebastian Huber, embedded brains GmbH
>>
>>                 Address : Dornierstr. 4, D-82178 Puchheim, Germany
>>                 Phone   : +49 89 189 47 41-16
>>                 Fax     : +49 89 189 47 41-09
>>                 E-Mail  : sebastian.huber at embedded-brains.de
>>                 <mailto:sebastian.huber at embedded-brains.de>
>>                 PGP     : Public key available on request.
>>
>>                 Diese Nachricht ist keine geschäftliche Mitteilung im
>>                 Sinne des EHUG.
>>
>
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