[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RES: ERC32 clock counter incorrect



Rule number one when reading the ATMEL ERC32 documentation (and also the old
Temic ERC32 chipset): don't trust it!

There are errors concerning the UART Scaler at reset, Signals Description,
many typos... even the index of the TSC695F User's Manual is wrong!

No surprise there is one more error in the RTC Timeout. I hope the
documentation for LEON2 is better.

Fabr?cio.



-----Mensagem original-----
De: rtems-users-bounces at rtems.org [mailto:rtems-users-bounces at rtems.org] Em
nome de SERONIE VIVIEN, Jacques
Enviada em: segunda-feira, 9 de mar?o de 2009 10:40
Para: rtems-users at rtems.com; GUIBOURET, Damien
Assunto: ERC32 clock counter incorrect


I just checked ATMEL TSC695F (ERC32) documentation. The formula given to
compute the duration of the timer does not require a "-1" on the counter
register (only on the scaler). The documentation states that if the
counter register is set to 0, the timer is stopped (no interrupt is
generated), this would not consistent with the "-1".

But as documentation can contain errors, I would be interested in the
actual tests you performed to find that the "-1" is required.

Regards.

PS: Documentations for LEON2 and LEON3 are differents and clearly
require the "-1" as it is sait that the timer interrupt is generated
when the counter underflows.


Ce courriel (incluant ses eventuelles pieces jointes) peut contenir des
informations confidentielles et/ou protegees ou dont la diffusion est
restreinte. Si vous avez recu ce courriel par erreur, vous ne devez ni le
copier, ni l'utiliser, ni en divulguer le contenu a quiconque. Merci d'en
avertir immediatement l'expediteur et d'effacer ce courriel de votre
systeme. Astrium decline toute responsabilite en cas de corruption par
virus, d'alteration ou de falsification de ce courriel lors de sa
transmission par voie electronique.
This email (including any attachments) may contain confidential and/or
privileged information or information otherwise protected from disclosure.
If you are not the intended recipient, please notify the sender immediately,
do not copy this message or any attachments and do not use it for any
purpose or disclose its content to any person, but delete this message and
any attachments from your system. Astrium disclaims any and all liability if
this email transmission was virus corrupted, altered or falsified. 
---------------------------------------------------------------------
Astrium SAS (393 341 516 RCS Paris) - Siege social: 6 rue Laurent Pichat,
75016 Paris, France
_______________________________________________
rtems-users mailing list
rtems-users at rtems.com
http://rtems.rtems.org/mailman/listinfo/rtems-users