ST7796S with ESP32

[busterkika]

Hi guys,

I'm trying to use the TST_eSPI library with the TFT SP7796S but I can't get out of the white screen. I tried everything but I can't go out of white screen. My configuration is:

[code]
TFT_eSPI ver = 2.5.0
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 = 40.00
Touch SPI frequency   = 2.50
[/code]

Connections:

Code:

// See SetupX_Template.h for all options available
#define USER_SETUP_ID 36

#undef RPI_DISPLAY_TYPE

#define ST7796_DRIVER

#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


#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_GFXFF  // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts

#define SMOOTH_FONT


#define SPI_FREQUENCY  40000000

#undef SPI_TOUCH_FREQUENCY
//#define SPI_TOUCH_FREQUENCY  2500000

Thanks a lot.

[xfpd]

Try this thread...

Tft 3,5'' Screen shield with esp32s White screen

I have been looking for answers, and I found the answer in this video: [Esp32 + 3.5" tft ( parallel interface ) ч.1] People in the comments had this same white screen problem. I haven't seen the whole picture before facing the problem. you can fix it as follows. The man in the video kindly answered many questions from users and after reading a few it became clear to me. you must download the TFT_eSPI library from the arduino IDE or from github. Then you open the folder of the …

[busterkika]

Yes. I already do that. But I still have a white screen. Is there any way to test the TFT without arduino or ESP32 ? Can I put a SDCard with some program to test the screen?

[photoncatcher]

Hi Busterkika,
Your question: Is there any way to test the TFT without arduino or ESP32 ?
I wouldn't know.
However: what is pixel dimension of you TFT and most importantly, what is the controller chip. ILI 8481. ILI 8486, ILI9488 ?
Cheers, Photoncatcher

[busterkika]

@photoncatcher

ILI9488

Supposedly, the chipset is ST7796S... please check below the specification: