loopstudio

Finally I solved the wrong colors also, by simply making a swap / reassignment to my own colors. And unstable unreliable results and connections was fixed by putting in some delays.

So now there is only 2 problems left: 1) I cannot get any of my standalone reset methods to work. Nothing happens or it feels random if they are working. I felt I saw it working once, but it might have been something else looking like. Method 1...

Now I finally found the solution! :) init() has en extra parameter, wehere its possible to remocve the reset form the nit() routtine! And it worked! <3 Adafruit_ST7789 tft1 = Adafruit_ST7789(TFT_CS1, TFT_DC, -1); // ✅ Remove reset from init()...

Is the Adafruit library able to handle 2 separate displays ??? May be it has some global variables. Try to connect only one display and make it work.

I just found this post about an issue with that init() is resetting all displays, since RST is shared pin: https://forum.pjrc.com/index.php?threads/5-lcds-on-one-spi-bus-with-the-library-st7789_t3-h-on-teensy-3-5.71897/ So I will try to see if I...

My plan is to run the first 5 TFTs on SPI0, the next 5 TFTs on SPI1 and the last controller TFT on SPI2. You have a link to your solution? And what library did you use? What technique did you use to get several displays to show result at the same...

NEW BETTER RESULT: Now I get first yellow fill on TFT1 and then blue fill on TFT2! The PROBLEM is just that after filling tft1 with yeellow & text, tft1 is getting all white when filling tft2 with blue & text. Any suggestions to what could be...

Its strange, when I run the same code today, there is NO colors being shown at all. Only pixel chaos or whitescreens.

G) Also: What is the difference between ST7789 and the ST7789P3 ? Because my display is ST7789P3, but all drivers are plain ST7789.

Yes, I totally agree, I have been using ChatGPT intensively for a month now, and its performance is really scary! First you get amazed how fast it helps you in the right direction, but then after many hours, a day or 3 you discover how...

The change to correct default pins surely helped, thank you! :) BUT... - Only the right 1/4 of the display gets updated, the rest is pixel noise - its difficult to get any text visible on the display at all. When it once succeeded me, it was...

Are these the pins you are trying to use on Teensy 4.1? Pins 21 and 22 are not SPI pins, SPI pins are 11-13 SPI1 pins are by default: 26, 27, 1, but there are a few alternative pins for some of the functions like pin 39

There is also a ST7735_t3 library that is bundled with Teensyduino, it supports the ST7735 and the ST7789. There are multiple examples to show how to setup. For example, for a 240x240 display the initialization is simply // For 1.54" TFT with...

You are so right! - I have also been looking at this earlier, but it was ChatGPT who advised the connections, and I didnt question it enough apparently, as of cause ChatGPT can be wrong. But for me as a beginner, firsttime-usre of Teensy, I just...

same as with my answer to thebigg

Sounds interesting, I will try that too and return when done.

The SPI.begin() wasnt there at first, ChatGPT just suggested t put it in, to try fix the problem, but it didnt. So the code also doesntw ork without.

The Teensy: https://vi.aliexpress.com/item/4001148959991.html OS: WIn10 The TFTs are the 8pin version without PCB Now we test with the TFT_eSPI.h library. before with the Adafruit_ST7789.h and we have also tested with just SPI.h Which build do...

We have now also tested with the TFT_eSPI.h library. Still just white screens all the time. We have now measured that SPI is completely dead. So any suggestions why we dont get fluctuations and pulsations on the SPI screw-pins-out-board where...

Hi I have bought some https://vi.aliexpress.com/item/1005007643668155.html 2.25" TFT RGB displays 76x280p with SPI-interface. No matter what program I try or method or properties or settings, I can only get the default WHITE screen! I cannot get...