Is it possible for nRF52840 to drive an 240RGB x 320 LCD

RE: Is it possible for nRF52840 to drive an 240RGB x 320 LCD

Edvin — Fri, 22 May 2020 10:40:08 GMT

Hello,

I don't know how PNG files are put together, and how to "convert it to hex file". You need to study how png files are built up to see how the pixels are stored, and find a way to use that in your application.

RE: Is it possible for nRF52840 to drive an 240RGB x 320 LCD

Anupam — Wed, 20 May 2020 19:26:12 GMT

i need to convert PNG file in hex file to finally write into hex file,how you are converting PNG file to binary file and include h file,which tool you are using?? can we directly convert PNG file to hex file using online tools and that value can be directly write to external flash,will it work?

RE: Is it possible for nRF52840 to drive an 240RGB x 320 LCD

Jimmy Wong — Mon, 18 May 2020 03:20:03 GMT

Hi,

the size of the 1 frame is 150KB (320x240x2) (16 bits color).

It depends on your qspi flash.

I don't have any extra emoji demo.

RE: Is it possible for nRF52840 to drive an 240RGB x 320 LCD

Anupam — Mon, 18 May 2020 03:14:29 GMT

i have a tftp display 2.4" 320x240 interface.

RE: Is it possible for nRF52840 to drive an 240RGB x 320 LCD

Jimmy Wong — Sat, 05 Oct 2019 14:21:41 GMT

Hi

You can use the QSPI (reading image) and High Speed SPIM3 with ArrayList DMA to drive the LCD display.

I did the demo on the URL

https://jimmywongbluetooth.wordpress.com/2019/10/05/lcd-display-on-nrf52840/

RE: Is it possible for nRF52840 to drive an 240RGB x 320 LCD

Edvin — Tue, 06 Aug 2019 09:32:57 GMT

Hello,

I assume that the display uses SPI as the data bus?

There is an example called gfx, located in SDK\examples\peripherals\gfx. You can use that as a starting point to test your LCD screen. I don't know if your screen is any of the displays in the example, but it may be a good place to start either way.

As you say, memory is a challenge. I don't know if you intend to display images, text or figures, but you may not need to store all pixels individually, depending on how you use it.

Best regards,

Edvin

RE: Is it possible for nRF52840 to drive an 240RGB x 320 LCD

Dmitry — Tue, 06 Aug 2019 07:47:01 GMT

Hi,

As long as you won't try to show 30fps video, I don't see any obstacles. As I understand, you have a TFT display with 8-bit parallel bus (or SPI? correct me if I'm wrong) You cannot map its memory, instead you should write a procedure that will refresh internal display memory (GRAM) with your content.