TWR-LCD-RGB and TWR-K60N512

[weblar]

Does anyone know if its possible to hook the TWR-LCD-RGB module up to the TWR-K60N512 tower stack?

Looking at the schematics, it seems that the LCD module uses a 24-bit interface which I can presumably drive through GPIO.

Thanks in advance,

Kev

[gagangarg]

Hey Kevin,

I am also working on same kind of project. I am also using gpio pins to drive the lcd .

I am at the early stage of project. I just want to simply transfer data from sram to gpio port .But I am facing a mysterious problem. that it suddenly stops of no reason. the data on gpio doesnt modify but the request to dma is given at regular time. I am using port C's  0-7 pin for this purpose and it always struct when its lower nibble faces data 0x08. I know its funny. i have tried several thing but couldnt find the problem. I think there is a problem with the multiplexing of pins.

It would be great if u could share your code with me

Regards,

Gagan Garg

[weblar]

Hi,

I'm not sure I'm able to help as I am not using DMA, just raw GPIO control.

I would like to use DMA though so if you could share your code, I'd gladly help where I can.

Kind regards,

Kevin

[LuisCasado · Accepted solution]

Hello Kev,

Perhaps you could hook any other smaller TFT, smaller resolution and 16bpp using GPIO and DMA to generate the Pixel clock and Hsync, Vsync + RGB data (565). But for TWR-LCD-RGB you need 480x320x 24bpp= 345600 bytes to mantain your video memory (frame buffer). So you don't have enough RAM. For QVGA @ 16bpp you need around 153 Kbytes of RAM. For TWR-LCD-RGB you need K70.

Best Regards,

Luis

[weblar]

Hi Luis,

Thanks for your reply.

I completely forgot to take into account the RAM requirements.

K70 it is then.