RGB Display mapping output pin modify

wu william

Other Parts Discussed in Thread: 4460

Hi~

We used Pandaboard (OMAP 4460) to develop.

And we want to bring up 18 bit RGB panel .

Could we assign the RGB output pin by driver?

EX : R[5:0] =>D[5:0] G[5:0]=>D[6:11] B[5:0] => D[12:17]

assign to R[5:0] =>D[5:0] G[5:0]=>D[13:8] B[5:0] => D[21:16]

thanks.

0 Renjith Thomas over 13 years ago

Guru 31670 points

William,

Check the panel datasheet. It will give the order in which it expects the data. If you still doubt, share the datasheet.

0 wu william over 13 years ago in reply to Renjith Thomas

Dear Thomas

We have a PCB board to connect panel and PandaBoard.( RGB pin to Socket )

The PCB board pin define not match pandaboard output.(Design problem)

Pin to Pin connect.

Pandaboard D[23:0]=PCB board D[23:0]=>Panel

Output 18 bit RGB

PandaBoard D[5:0] ( R[5:0] ) => PCBboard D[5:0] => Not used => Panel

PandaBoard D[11:6] ( G[5:0]) => PCBboard D[11:6] => R[5:0] => Panel

PandaBoard D[17:12] (B[5:0] ) => PCBboard D[17:12] => G[5:0] => Panel

PandaBoard D[23:17] (XXXXXX) =>PCBboard [23:18] => B[5:0] => Panel

Could We modify PandaBoard RGB output pin (Ex: 18bit D[17:0] to D[23:6])??

thank you.

0 Rafael Rodriguez over 13 years ago in reply to wu william

Hi Wu

If the pandaboard RGB output you refer is dispc2_data[0:23] then you cannot change the order of the pins.

Also, if you check the 4460 TRM Figure 10-17 you'll see that data[0:5] is blue, data[6:11] green and data[12:17] is red.

Regards

Rafael

0 wu william over 13 years ago in reply to Rafael Rodriguez

Hi Rafael

yes , you are right. D[5:0] is Blue.

Thanks your support.

Processors forum