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Date: Tue, 15 Feb 2005 17:50:48 +0100
From: Konstantin Kletschke <lists@ku-gbr.de>
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Subject: Re: XIP aware file system
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You got it!

Finally I considered the OSCR running at 3.6MHz and did

#define xip_elapsed_since(x)    (signed)((IMX_TCN(IMX_TIM1_BASE) - (x)) * 28)

i.e. 112/4. And it runs and does xip and I can write to flash.
Im not believing what I see...

Am 2005-02-15 11:38 -0500 schrieb Nicolas Pitre:

> I'm not sure if it is strictly necessary to use ICMR.  According to the 
> manual quoted above masked interrupts only update ICPR and not ICIP.  If 
> so the & with ICMR is redundent.

I think it is redundant but I don't know exactly the meaning of
ICMR|ICCR.

> If your time base runs at 32kHz you need:
> 
> #define xip_elapsed_since(x) (signed)((IMX_TCN(IMX_TIM1_BASE) - (x)) * 31)

Right. As said, I assumed OSCR runs 3.6MHz and came to * 28, but I
should do 112/3.6.
Thanks for your nice explanation.

> Where do you see that?

ARGH! It was mine! 

> Please study carefully xip_udelay() and try to understand _when_ it is 

Im trying hard :)

> Look at your xip_elasped_since() implementation.

All right, I did while you calculated the values for me :)

Thanks for your help, Konsti

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