[nrf52832] gc9a01 LCD (240 * 240) output problem

RE: [nrf52832] gc9a01 LCD (240 * 240) output problem

cabin — Thu, 13 Apr 2023 03:16:34 GMT

Thank you for your reply.

I will try several things.

Cabin

RE: [nrf52832] gc9a01 LCD (240 * 240) output problem

Raoul — Wed, 12 Apr 2023 23:17:13 GMT

Hi Cabin,

As my colleague noted in your previous case, 8MHz really is the maximum SPIM speed for the nRF52832. So if the SPIM speed is the bottleneck, there is nothing you can do. You can't do it through software / "bit-banging" either, you won't be able to toggle the GPIO fast enough.

If you have an nRF52840 available, please try running this code on that, and see if the speed increases.

Alternatively, take a look at the module/component datasheet and see if there are alternative modes of writing, that might let you avoid drawing the whole screen at once. Then you could do small changes to the screen without the "stair" effect.

Best regards,

Raoul

RE: [nrf52832] gc9a01 LCD (240 * 240) output problem

cabin — Wed, 12 Apr 2023 07:08:44 GMT

Thank you for your reply.
Is there an example of applying GFX to gc9a01?
When I do it myself, nrf_gfx_print_fast() doesn't work.

Cabin

RE: [nrf52832] gc9a01 LCD (240 * 240) output problem

azwin — Tue, 11 Apr 2023 09:08:40 GMT

try adding Adafruit GFX library in main .