[U-Boot-Users] CFG_HZ value
Wolfgang Denk
wd at denx.de
Wed Jun 20 09:27:28 CEST 2007
In message <87A697E50899F541B77272C331CEB744D502 at exchange.Q-DOMAIN> you wrote:
>
> How should one define CFG_HZ? It seems that it's to be set to 1000.
Correct. Please consider CFG_HZ as a constant which has to be set to
1000 on all systems.
> However my system clock speed is not this. What are the rules for
It has nothing to do with any clock speed, like the time unit
(seconds) on you digital watch has nothing to do with the actual
clock of the quartz used somewhere in it.
> Should I replace the CFG_HZ with my real system clock speed? BTW, I
No. CFG_HZ is always 1000.
> have to read a register at boot time to determine what speed I am
> running at. I do this early on and save a variable 'clock_speed' that
> other functions can use to determine the system clock speed.
With correctly implemented timer functions it just works.
> ------_=_NextPart_001_01C7B2DA.91121226
> Content-Type: text/html;
Please never post HTML here.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
How many NASA managers does it take to screw in a lightbulb? "That's
a known problem... don't worry about it."
More information about the U-Boot
mailing list