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moononournation / Arduino_GFX

Arduino GFX developing for various color displays and various data bus interfaces
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JC3248W535 device, (ESP32-s3 with 480x320 touch lcd) not working when used directly (without canvas) #551

Open danielezing opened 10 hours ago

danielezing commented 10 hours ago

Hi, I tested this library on a esp32s3 board with touch lcd (namely the JC3248W535 device, 480x320 touch lcd, I have several boards). The library works OK (I tried the PDQgraphicstest ) when using the CANVAS, but if I try to use directly the dispolay (without canvas, I can't use so much RAM for frame buffer) it's not working at all. In particular:

Is this library intended to be used only with a canvas, or can I use it directly on the SPI connected display? I tried to slow down the SPI but no change. Thank you!

moononournation commented 9 hours ago

yes, all the dev device suggested canvas in PDQ should use canvas

danielezing commented 9 hours ago

Thank you for the quick reply .... Now my problem remains ... I can't afford a 480x320 frame buffer on an esp32 .... Is there problem related to testing, or are some low level functions missing ? As canvas is working (that is, when a complete image is copied in one block to the display) .... taking a look at "flush()" I see that actually there is a copy of the whole canvas in a pixel by pixel way ... so I can't figure out where could be the problem ...

moononournation commented 9 hours ago

this dev board have PSRAM, please enable it