[SOLVED] Library ST7735 NEEDS SUPPORT for 1.54" 240x240 Wide

[fazambuja]

Update:

04/24/2018 - the Adafruit-ST7735-Library now supports the new Adafruit 1.54" 240x240 Wide Angle TFT LCD Display with MicroSD - ST7789 (https://www.adafruit.com/product/3787).

Still, have some questions on the pinout and the backlight.

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There is also no official guide or pinout info.
Bellow is my guess of the pinout.

Pinout guesses Front/Back

Vi / Vin - input

3V / 3Vo - 3V Output???

G / Gnd - Ground

CL / SCK \leftarrow - Serial Clock

SO / MISO \rightarrow - Master In Slave Out (SD card only)

SI / SI - MOSI (Master Out Slave In)

TC / TF CS - Slave Select, TFT Slave Select

RT / RT - Reset pin

DC / DC - data or command selector pin

CC / SD CS - Slave Select, SD card reader Slave Select

BL / BL - TFT Backlight

[solardude]

I just received this screen also and I can't get the ST7735 library to properly operate the screen even after the screen size has been changed to 240x240.

It looks to not be as simple as just using the ST7735 library.

Where can we get a proper PIN out descriptions and a working library that were all so used to getting from Adafruit?

Looking forward to getting this screen working.

[fazambuja]

Same here. The library was apparently not updated for this new screen. Did you change the screen resolution on the library definitions?

[solardude]

Yes, I did and I can only get 70-75% of the screen to show.

Tried the same library on the Particle Photon with more memory than the Arduino Uno and I get the same thing.

So it's going to take more than changing the screen pixel size to get this working.

[fazambuja]

I'm on a ESP32.. I believe is the same ST7789 chip used on the Espressif ESP32 WROVER KIT - V3 https://www.adafruit.com/product/3384

I tried the https://github.com/Bodmer/TFT_eSPI and got something similar.
Hopefully, someone reads this post and updates the library.

[solardude]

Yes, pretty frustrating not being able to use the screens.

Not sure why they would not post a guide or library for this.

They probably just sold 50 to 100 of these before selling out so I'm sure there will be plenty of others coming here needing the same help to get the screen working.

[solardude]

Same here. The library was apparently not updated for this new screen. Did you change the screen resolution on the library definitions?

I got the screen working with the ILI9341 library on a Particle Photon but I had to change the screen resolution to 240x240 and set the rotation to 2 before it would display correctly.

If you can set the resolution to 240x240 and then set the screen rotation to 2 using the ST7735 library and tell me what happens.

We still need on the official guide by Adafruit regardless because some functions like set screen black is not working.

[fazambuja]

We need a correct color table for the screen. I've tested all the options on https://github.com/Bodmer/TFT_eSPI and none worked.
The closest to black is actually the TFT_WHITE.

[fazambuja]

Just tried the https://github.com/espressif/WROVER_KIT_LCD library. It uses a ST7789V
It "works" but the colors are still off. Didn't try but there is support for the Backlight.

[solardude]

Just tried the https://github.com/espressif/WROVER_KIT_LCD library. It uses a ST7789V
It "works" but the colors are still off. Didn't try but there is support for the Backlight.

You can use this function to invert the colors :-)

tft.invertDisplay(1);

[fazambuja]

None. I believe rotation 2 and 3 work. The inverted colors do help but they are still off.

[solardude]

None. I believe rotation 2 and 3 work. The inverted colors do help but they are still off.

tft.invertDisplay(1);

Is working fine for me using the Adafruit_ST7735 library.

[fazambuja]

thanks. so far for me is:

Code: Select all

  tft.setRotation(2);
  tft.invertDisplay(1); 

Hopefully, the colors are a bit more vibrant with the official support.

[solardude]

I'm using

tft.invertDisplay(1);
tft.setRotation(2);

I think the colors are just fine on my screens.

The viewing angles are great also compared to most all other TFT displays I have tested.

Really nice little display for a reasonable price.

[fazambuja]

You are right compared to any of the little displays around it’s really good. However the yellow is looking faded to me...