Kinetis MicrocontrollersのトピックRe: TWR-LCD-RGB and TWR-K60N512

TWR-LCD-RGB and TWR-K60N512

weblar — Sat, 10 Nov 2012 16:24:48 GMT

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

Re: TWR-LCD-RGB and TWR-K60N512

LuisCasado — Sat, 10 Nov 2012 16:58:33 GMT

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

Re: TWR-LCD-RGB and TWR-K60N512

weblar — Sat, 10 Nov 2012 17:16:12 GMT

Hi Luis,

Thanks for your reply.

I completely forgot to take into account the RAM requirements.

K70 it is then.

Re: TWR-LCD-RGB and TWR-K60N512

gagangarg — Tue, 09 Apr 2013 06:28:05 GMT

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

Re: TWR-LCD-RGB and TWR-K60N512

weblar — Wed, 24 Apr 2013 18:38:56 GMT

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