i.MX Processors中的主题 Re: LCD_DATA vs RGB components

LCD_DATA vs RGB components

x10 — Thu, 03 Mar 2016 02:11:14 GMT

In my customer board which is iMX6UL based，DOTCLK mode with 18-bit is required. But I can not find the description of mapping of LCD_D[0..17] to RGB components in RM. Help is need, thanks in advance.

Cheng Shi

Emtronix

Re: LCD_DATA vs RGB components

Yuri — Thu, 03 Mar 2016 04:03:42 GMT

Hello,

the i.MX6 UL eLCDIF provides flexible options for color_bits-to-pins mapping.

Please take a look at section 33.4.2 (Write Data Path) of the i.MX6 UL Reference

Manual for details regarding pixel data from frame buffer to LCD path. Data of

the frame buffer will be mapped to external LCD bus pins. In particularly,

"WORD_LENGTH=3 indicates that the input frame-buffer is RGB 24 bits per pixel

(RGB 888). If BYTE_PACKING_FORMAT [3:0] is 0x7, it indicates that there is only

one pixel per 32-bit word".

Have a great day,
Yuri

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: LCD_DATA vs RGB components

x10 — Thu, 03 Mar 2016 08:03:30 GMT

Hi, Yuri

Thanks for your reply.

As my understanding, there are LCD_DATA[0..7] => R[0..7], LCD_DATA[8..15] => G[0..7], and LCD_DATA[16..23] => B[0..7] in 24-bit DOTCLK mode. Is that right?

Cheng Shi

Emtronix

Re: LCD_DATA vs RGB components

Yuri — Thu, 03 Mar 2016 08:07:16 GMT

Hi,

basically - yes ; but schematic should meet this configuration, and

it is needed to program this mapping.

Regards,

Yuri.

Re: LCD_DATA vs RGB components

x10 — Thu, 03 Mar 2016 08:13:46 GMT

Hi, Yuri

Are there any recommended mapping for 24-bit DOTCLK mode?

Cheng Shi

Re: LCD_DATA vs RGB components

Yuri — Tue, 15 Mar 2016 07:51:35 GMT

Hello,

According to the i.MX6 UL EVK scheme :

LCD_DATA [0-7] - B [0-7]

LCD_DATA [8-15] - G [0-7]

LCD_DATA [16-23] - R [0-7]

Regards,

Yuri.

Re: LCD_DATA vs RGB components

julbert — Fri, 02 Sep 2016 12:52:57 GMT

Hello,

I can confirm Yuri's answer. The data setup is :

LCD_DATA [0-7] - B [0-7]

LCD_DATA [8-15] - G [0-7]

LCD_DATA [16-23] - R [0-7]

I've just connect my display to a 3'th party development board at this way.

Regards János