STM32F103C8 & ST7789: Black screen

[Bruur-vr]

Hello,

I've bought a BluePill+ and a 1.3inch 240x240 ST7789 cheap chinese TFT LCD display.
Using old arduino IDe 1.6.5 and libraries: Adafruit_GFX 1.7.5, Arduino ST7789 STM32 (Pawel A. Hernik) 1.0.1 (& Fast ST7789 Library Pawel A. Hernik 1.0.4) I can get it working at a fast display clear & fill speed around 35Mbps.

But I would like to use a more recent version of the IDE since I'm going to be using 2SPI devices (SD & LCD) and recent version is more user friendly. I've tried this (eSPI) library but only get a black screen (backlight is on, I can see it switching when pressing reset).

• Using Arduino IDE 2.3.4
• Official STM32 core 2.3.0 installed
• Using STlink V2 to download
• Using example: Gradient_Fill
• User_Setup.h got this setup:

// Define STM32 to invoke optimised processor support (only for STM32)
#define STM32

// Display type -  only define if RPi display
//#define RPI_DISPLAY_TYPE // 20MHz maximum SPI

// Only define one driver, the other ones must be commented out
#define ST7789_DRIVER      // Full configuration option, define additional parameters below for this display

// For ST7735, ST7789 and ILI9341 ONLY, define the colour order IF the blue and red are swapped on your display
// Try ONE option at a time to find the correct colour order for your display

  #define TFT_RGB_ORDER TFT_RGB  // Colour order Red-Green-Blue
//  #define TFT_RGB_ORDER TFT_BGR  // Colour order Blue-Green-Red

// For ST7789, ST7735, ILI9163 and GC9A01 ONLY, define the pixel width and height in portrait orientation
 #define TFT_HEIGHT 240 // ST7789 240 x 240

// ######       EDIT THE PINs BELOW TO SUIT YOUR STM32 SPI TFT SETUP        ######

// The TFT can be connected to SPI port 1 or 2
#define TFT_SPI_PORT 1 // SPI port 1 maximum clock rate is 55MHz
#define TFT_MOSI PA7
//#define TFT_MISO PA6
#define TFT_SCLK PA5

//#define TFT_SPI_PORT 2 // SPI port 2 maximum clock rate is 27MHz
//#define TFT_MOSI PB15
//#define TFT_MISO PB14
//#define TFT_SCLK PB13

// Can use Ardiuno pin references, arbitrary allocation, TFT_eSPI controls chip select
//#define TFT_CS   PA4 // Chip select control pin to TFT CS D5
#define TFT_DC   PA2 // Data Command control pin to TFT DC (may be labelled RS = Register Select) D6
#define TFT_RST  PA1 // Reset pin to TFT RST (or RESET) D7
// OR alternatively, we can use STM32 port reference names PXnn
//#define TFT_CS   PE11 // Nucleo-F767ZI equivalent of D5
//#define TFT_DC   PE9  // Nucleo-F767ZI equivalent of D6
//#define TFT_RST  PF13 // Nucleo-F767ZI equivalent of D7

//#define TFT_RST  -1   // Set TFT_RST to -1 if the display RESET is connected to processor reset
                        // Use an Arduino pin for initial testing as connecting to processor reset
                        // may not work (pulse too short at power up?)

#define LOAD_GLCD   // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
#define LOAD_FONT2  // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
#define LOAD_FONT4  // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
#define LOAD_FONT6  // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
//#define LOAD_FONT7  // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:-.
//#define LOAD_FONT8  // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
//#define LOAD_FONT8N // Font 8. Alternative to Font 8 above, slightly narrower, so 3 digits fit a 160 pixel TFT
//#define LOAD_GFXFF  // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts

// #define SPI_FREQUENCY   1000000
// #define SPI_FREQUENCY   5000000
// #define SPI_FREQUENCY  10000000
 #define SPI_FREQUENCY  20000000
// #define SPI_FREQUENCY  27000000
// #define SPI_FREQUENCY  40000000
// #define SPI_FREQUENCY  55000000 // STM32 SPI1 only (SPI2 maximum is 27MHz)
// #define SPI_FREQUENCY  80000000

// Optional reduced SPI frequency for reading TFT
#define SPI_READ_FREQUENCY  20000000

// The XPT2046 requires a lower SPI clock rate of 2.5MHz so we define that here:
#define SPI_TOUCH_FREQUENCY  2500000

Pins who give 3V (average, measured with multimeter range was 20V DC):
A0, A1, A2, A3, A11, A15, B4
Which is weird since PA5 & PA7 is defined as MOSI & SCLK, but they don't output anything..?

Any suggestions on how to troubleshoot this?