topic Re: 5329EVB LCD controller in ColdFire/68K Microcontrollers and Processors

5329EVB LCD controller

alark51 — Tue, 18 Mar 2008 03:37:11 GMT

Hi,

I've successfully interfaced an Optrex 6.5" LCD to this board and I've been able to get an image on the panel using the LCDC example source provided from freescale. I am having a bit of trouble using the BGLUT register.

The PCR register is set for 8bpp. I am able to put the image up on the panel and manipulate the cursor.

I would just like to know if I missing a step, do I have to set a register to display the BGLUT? This is my first time programming a LCD so any input would be appreciated.

my code

Code:

volatile uint32 *LUT_BG;MCF_LCDC_LVPWR = 0x00000280;for(i=0; i < (640); i++){    LUT_BG = (uint32*)0xFC0AC800 + i;    *LUT_BG = *(uint32*)(0x00000003);}

Thanks,
Adam

Re: 5329EVB LCD controller

AdamS — Sun, 20 Apr 2008 03:19:49 GMT

Hello,

I think that you have filled BGLUT space using only one colour.

you can use smth like below:

BGLUTAdd = (uint32*)0xFC0AC800; //set index for pointer

*BGLUTAdd ++ = color_1;
*BGLUTAdd ++ = color_2;

//now fill the rest of the space
while (BGLUTAdd <(uint32*)0xFC0ACC00) *BGLUTAdd ++ = color_n;

BGLUT adn GWLUT are used only in 4/8 bit modes. FOr higher modes mapping RAM is bypassed.

And one more:

please remember that for 4/8 bit modes mapping RAM must be filled with 18 bit color encoding words.

B.R. - Adam

Re: 5329EVB LCD controller

kaipaulus — Wed, 30 Jan 2013 12:18:31 GMT

Dear Adam,

how can i set the BGLUT Look-Up Register in K70? I try it with the following code. But this node work.

volatile uint_32 *LUT_BG;

LUT_BG = (uint_32*)0x400B6800;

*LUT_BR++ = color_1;

....

Thanks

Kai Paulus

Re: 5329EVB LCD controller

TomE — Wed, 30 Jan 2013 22:27:29 GMT

1 - You're replying to a post from nearly 5 years back.

2 - You're using a K70, and this is the ColdFire forum. Search the Kinetis forum for "k70 lcdc" and post there.

3 - Your code looks fine. What "node work"? You've probably got bugs elsewhere.

Tom

Re: 5329EVB LCD controller

kaipaulus — Thu, 31 Jan 2013 05:57:29 GMT

Dear Tom,

i have post my question in the K70 Forum. My problem is, i can not change the contents of the Background Look-Up Tabelle with my code. It seems that this area is write-protected.

Kai