[U-Boot-Users] Resulution of udelay and co

[U-Boot-Users] Resulution of udelay and co

[Jens Scharsig]

Hallo,

I am a little bit confused about udelay(unsigned long usec), 
get_timer(ulong base) and wait_ticks (unsigned long ticks).

Witch resolution should have this functions?

Thanks

Jens

[U-Boot-Users] Resulution of udelay and co

[Jens Scharsig]

By the way, what means the value of CFG_HZ

[U-Boot-Users] Resulution of udelay and co

[Wolfgang Denk]

In message <eies5r$2fn$1@sea.gmane.org> you wrote:
> 
> I am a little bit confused about udelay(unsigned long usec), 
> get_timer(ulong base) and wait_ticks (unsigned long ticks).
> 
> Witch resolution should have this functions?

unsigned long usec = microseconds.

unsigned long ticks = ticks.

With the recommended setting of CFG_HZ=1000 a tick is a millisecond.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Bus error -- driver executed.

[U-Boot-Users] Resulution of udelay and co

[Wolfgang Denk]

In message <eiesap$2fn$2@sea.gmane.org> you wrote:
> By the way, what means the value of CFG_HZ

The number of ticks per second, like HZ in Linux.

For U-Boot, CFG_HZ is a constant of 1000.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
I often quote myself; it adds spice to my conversation.  - G. B. Shaw

[U-Boot-Users] Resulution of udelay and co

[Jens Scharsig]

Wolfgang Denk schrieb:
> In message <eies5r$2fn$1@sea.gmane.org> you wrote:
>> I am a little bit confused about udelay(unsigned long usec), 
>> get_timer(ulong base) and wait_ticks (unsigned long ticks).
>>
>> Witch resolution should have this functions?
> 
> unsigned long usec = microseconds.
> 
> unsigned long ticks = ticks.
> 
> With the recommended setting of CFG_HZ=1000 a tick is a millisecond.
> 
> Best regards,
> 
> Wolfgang Denk
> 

Thanks

I will correct the timer functions for my target cpu to be really CLK 
dependently.

Jens