Omap3 ISP IRQ Question (clear IRQ)

Arno Steffens

Intellectual 930 points

For every incoming image to ISP I get 2 IRQ0. I am wondering why?

I enabled the following IRQs in IRQ0 (ISP_IRQ0ENABLE).

0x82000100 -> HS_VS_IRQ, CBUFF_IRQ and CCDC_VD0_IRQ

But if I read the Status I see for every incoming images 2 IRQs:

800000008 and 1008 (repeating)

As 0x1000 means AF is done I am totally confused. I didn't enable it, and AF is not enabled at all.

At the beginn of the ISR I clear the IRQ by reading status and write it back. So I checked what's in the status-register after write back (clear). I have been surprised to see that writing 0x800000008 into IRQStatus0 and reading Status again gives back this 0x1008.

What does this mean? Is this a bug in ISP block?

over 14 years ago

0 Vaibhav Hiremath over 14 years ago

TI__Expert 8180 points

Hi Steffens,

This can not be the case actually, I haven't heard anything like this before. So its very difficult to comment/conclude on this with the above details. Can you please provide more details like -

- Which PSP release (Kernel Version/baseline) you are based out ?

- CCDC register configuration?

- And finally some background on what exactly you are trying to do/achieve here would be helpful here?

Thanks,

Vaibhav

0 Arno Steffens over 14 years ago in reply to Vaibhav Hiremath

Intellectual 930 points

Thanks Vaibhav,

you're right. My mistake. Checking the printout of IRQ status I used %x8 instead of %8x. That causes this shift. Shame on me.

Regards

0 Vaibhav Hiremath over 14 years ago in reply to Arno Steffens

TI__Expert 8180 points

Great that you found out the root-cause.

Thanks,

Vaibhav

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Omap3 ISP IRQ Question (clear IRQ)