ST7789v2 based display not working with ST7789/ST7789_2 drivers but works (kinda) with ILI9341 driver

[MagnusThome]

I have a problem getting this ST7789v2 display to work with either ST7789 or ST7789_2 drivers.
https://www.digikey.se/en/products/detail/az-displays/ATM0200B3/18796376
https://www.azdisplays.com/PDF/ATM0200B3.pdf

bit bash example output:

 ===========================
Register 0x01: 0x00
Register 0x04: 0x858552
Register 0x09: 0x610000
Register 0x0A: 0x08
Register 0x0B: 0x00
Register 0x0C: 0x06
Register 0x0D: 0x00
Register 0x0E: 0x00
Register 0x0F: 0x00
Register 0x2E: 0x00
Register 0x3F: 0xFFFFFFFF
Register 0xDA: 0x85
Register 0xDB: 0x85
Register 0xDC: 0x52
===========================

Looks like driver chip is: Unknown                                 

1: ILI9341_DRIVER works, kinda

TFT_eSPI examples work with the ILI9341_DRIVER with the user settings as enclosed further below but only with this atypical landscape setting line:

TFT_eSPI tft = TFT_eSPI(320,240);       // Invoke custom library

(regardless TFT_WIDTH and TFT_HEIGHT in user settings set as landscape or portrait)

Colors seem wonky, it is worse in real life, hard to catch in a photo. Full red, green, blue are ok.

I got a bit confused with the Matrix example since it mixed horizontal and vertical behavior in odd ways depending on setRotation but maybe that example is built like that.

2: ST7789_DRIVER(s), no go

Both the ST7789_DRIVER and ST7789_2_DRIVER just give me a black screen whatever other things in user settings I change. The code runs though, if I add serial prints they do print out.

3: Adafruit ST7789 driver and example works

The Adafruit ST7789 (v1.10.4) drivers and the example at this link works with the display
https://github.com/adafruit/Adafruit-ST7735-Library/tree/master/examples/graphicstest_st7789
(a bit odd but a few times I only got it running properly if I added a call to tft.setRotation(1) after the line with tft.init(240, 320); but I had problems repeating this issue)

I use:

Arduino IDE
TFT_eSPI v2.5.43
rp2040 v2.4.0

#define ILI9341_DRIVER
//#define ST7789_DRIVER   
//#define ST7789_2_DRIVER    

#define CGRAM_OFFSET      // Library will add offsets required
#define TFT_RGB_ORDER TFT_RGB  // Colour order Red-Green-Blue
//#define TFT_RGB_ORDER TFT_BGR  // Colour order Blue-Green-Red
#define TFT_INVERSION_ON
//#define TFT_INVERSION_OFF

#define TFT_SPI_PORT 0 // Set to 0 if SPI0 pins are used, or 1 if spi1 pins used

#define TFT_WIDTH  320
#define TFT_HEIGHT 240

#define TFT_MOSI 3
#define TFT_MISO -1 
#define TFT_SCLK 2
#define TFT_CS   1

#define TFT_DC   8 
#define TFT_RST  7 

Working, kinda:

[code]
TFT_eSPI ver = 2.5.43
Processor    = RP2040
Transactions = Yes
Interface    = SPI
Display driver = 9341
Display width  = 240
Display height = 320

MOSI    = GPIO 3
SCK     = GPIO 2
TFT_CS   = GPIO 1
TFT_DC   = GPIO 8
TFT_RST  = GPIO 7

Font GLCD   loaded
Font 2      loaded
Font 4      loaded
Font 6      loaded
Font 7      loaded
Font 8      loaded
Smooth font enabled

Display SPI frequency = 40.00
[/code]

No go:

[code]
TFT_eSPI ver = 2.5.43
Processor    = RP2040
Transactions = Yes
Interface    = SPI
Display driver = 7789
Display width  = 240
Display height = 320

MOSI    = GPIO 3
SCK     = GPIO 2
TFT_CS   = GPIO 1
TFT_DC   = GPIO 8
TFT_RST  = GPIO 7

Font GLCD   loaded
Font 2      loaded
Font 4      loaded
Font 6      loaded
Font 7      loaded
Font 8      loaded
Smooth font enabled

Display SPI frequency = 40.00
[/code]

No go:

[code]
TFT_eSPI ver = 2.5.43
Processor    = RP2040
Transactions = Yes
Interface    = SPI
Display driver = 778B
Display width  = 240
Display height = 320

MOSI    = GPIO 3
SCK     = GPIO 2
TFT_CS   = GPIO 1
TFT_DC   = GPIO 8
TFT_RST  = GPIO 7

Font GLCD   loaded
Font 2      loaded
Font 4      loaded
Font 6      loaded
Font 7      loaded
Font 8      loaded
Smooth font enabled

Display SPI frequency = 40.00
[/code]

[MagnusThome]

A bit old thread, but does it have any bearing on this? I do have a separate reset hooked up though as mentioned in this thread.
#322

[MagnusThome]

Have now tried everything above with an ESP32 instead of the RP2040. Identical results.