i.MX Processorsのトピックi.MX6 IPU Look Up Table.

i.MX6 IPU Look Up Table.

satoshishimoda — Tue, 08 Apr 2014 09:45:50 GMT

Hi community,

I have a question about i.MX6SDL IPU.

End user want to make a color pallet likes following.

=====

Input data : 8 bit, Output data : RGB888

For example:

Input: 0 --> Output : (0, 255, 255)

Input: 1 --> Output : (0, 255, 0)

Input: 2 --> Output : (30, 0, 250)

...

Input: 255 --> Output : (20, 100, 100)

=====

I think it can be realized by Look Up Table in IDMAC.

Is my understanding correct?

If my understanding is correct, could you let me know how to set the Look Up Table and how to use it?

Actually, I looked for the setting register, but I did not understand what is it.

Best Regards,

Satoshi Shimoda

Re: i.MX6 IPU Look Up Table.

Yuri — Tue, 08 Apr 2014 10:36:51 GMT

You are right, it is possible to use the IPU LUT as a color pallet.

Please refer to section 38.4.2.9 (LUT- Look Up Table) of the i.MX6 SDL RM.

It is needed to setup "Pixel Format Select" field of the CPMEM as Code (LUT) .

Have a great day,
Yuri

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Re: i.MX6 IPU Look Up Table.

satoshishimoda — Wed, 09 Apr 2014 01:49:50 GMT

Hi Yuri,

Thank you for your reply.

By the way, i.MX6 Linux BSP (L3.0.35_4.1.0) supports the IPU LUT?

Best Regards,

Satoshi Shimoda

Re: i.MX6 IPU Look Up Table.

Yuri — Wed, 09 Apr 2014 02:19:06 GMT

Our Linux BSP doesn’t support the LUT function.

Re: i.MX6 IPU Look Up Table.

satoshishimoda — Wed, 09 Apr 2014 02:25:29 GMT

Dear Yuri,

OK, I understand Linux BSP doesn't support LUT function, so user should modify the code by themselves.

Best Regards,

Satoshi Shimoda