I want to use a display without pcb so i can connect it to my own pcb. I don't understand why my display stays white or black (2 different displays).
I have this display: ( 2.4/2.8/3.2/3.5 Inch Tft Lcd scherm Touch Panel 40 Pin Socket Mcu I8080 8/16BIT Spi 3/4 Draad Pcb Connector Ips Full View|3.5 inch tft|lcd display screeninch tft lcd - AliExpress)
Both 3.5" without touch (super wide and ips)
I see i can connect it via SPI (so no D0 till D15) which means i wouldn't need a 74hc595.
(Ps: I'm sorry, i meant a shift register instead of a multiplexer).
I have made my own user_setup file and checked connections multiple times, but the display doesn't show anything.
This is the "read_user_setup":
TFT_eSPI ver = 2.3.70
Processor = ESP32
Frequency = 240MHz
Transactions = Yes
Interface = SPI
Display driver = 7796
Display width = 320
Display height = 480
MOSI = GPIO 23
MISO = GPIO 19
SCK = GPIO 18
TFT_CS = GPIO 15
TFT_DC = GPIO 2
TFT_RST = GPIO 4
TOUCH_CS = GPIO 22
Font GLCD loaded
Font 2 loaded
Font 4 loaded
Font 6 loaded
Font 7 loaded
Font 8 loaded
Smooth font enabled
Display SPI frequency = 10.00
Touch SPI frequency = 2.50
This is my setup file
// USER DEFINED SETTINGS
// Set driver type, fonts to be loaded, pins used and SPI control method etc
//
// See the User_Setup_Select.h file if you wish to be able to define multiple
// setups and then easily select which setup file is used by the compiler.
//
// If this file is edited correctly then all the library example sketches should
// run without the need to make any more changes for a particular hardware setup!
// ##################################################################################
//
// Section 0. Call up the right driver file and any options for it
//
// ##################################################################################
// Display type - only define if RPi display
//#define RPI_DISPLAY_TYPE
// Only define one driver
#define ST7796_DRIVER
// ##################################################################################
//
// Section 1. Define the pins that are used to interface with the display here
//
// ##################################################################################
// >>>>> EDIT THE PIN NUMBERS IN THE LINES FOLLOWING TO SUIT YOUR ESP32 SETUP <<<<<
// The ESP32 hardware SPI can be mapped to any pins, these are the recommended default
#define TFT_MISO 19
#define TFT_MOSI 23
#define TFT_SCLK 18
#define TFT_CS 15 // Chip select control pin
#define TFT_DC 2 // Data Command control pin
#define TFT_RST 4 // Reset pin (could connect to RST pin)
//#define TFT_RST -1 // Set TFT_RST to -1 if display RESET is connected to ESP32 board RST
#define TOUCH_CS 22 // Chip select pin (T_CS) of touch screen
// ##################################################################################
//
// Section 2. Not used for ESP32
//
// ##################################################################################
// ##################################################################################
//
// Section 3. Define the fonts that are to be used here
//
// ##################################################################################
// Comment out the #defines below with // to stop that font being loaded
// The ESP8366 and ESP32 have plenty of memory so commenting out fonts is not
// normally necessary. If all fonts are loaded the extra FLASH space required is
// about 17Kbytes. To save FLASH space only enable the fonts you need!
#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
// Comment out the #define below to stop the SPIFFS filing system and smooth font code being loaded
// this will save ~20kbytes of FLASH
#define SMOOTH_FONT
// ##################################################################################
//
// Section 4. Not used
//
// ##################################################################################
// ##################################################################################
//
// Section 5. Other options
//
// ##################################################################################
// Define the SPI clock frequency, this affects the graphics rendering speed. Too
// fast and the TFT driver will not keep up and display corruption appears.
// With an RPi ST7796 MH4.0 display 80MHz is OK for ESP32, 40MHz maximum for ESP8266
#define SPI_FREQUENCY 10000000
// #define SPI_FREQUENCY 20000000
// #define SPI_FREQUENCY 40000000
// #define SPI_FREQUENCY 80000000
// The ESP32 has 2 free SPI ports i.e. VSPI and HSPI, the VSPI is the default.
// If the VSPI port is in use and pins are not accessible (e.g. TTGO T-Beam)
// then uncomment the following line:
//#define USE_HSPI_PORT
// The XPT2046 requires a lower SPI clock rate of 2.5MHz so we define that here:
#define SPI_TOUCH_FREQUENCY 2500000
I also notice that the longer the display is connected, the display turns white with stripes
(i don't mean the diagonal stripes, they are from the screen protector)