Hello all,
The forum has changed somewhat, so if this is not in the correct section, please feel free to move it, or let me know.
Anyway, after many years of arduino mega experience, I have decided to use an esp32 board, specifically the ESP32-WROOM-32 board. (Diagram attached.) I have a 4" TFT display with the XPT2046 touch controller, and try as I might, I cannot get the display to work. I am using the TFT-eSPI library, and my user setup file is as follows:
#define USER_SETUP_ID 27
// ##################################################################################
//
// 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 5 // 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 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 successfully uploaded one of the example sketches, and the serial display shows the proper entries, hence I know the program actually uploaded. I am using the default VSPI SPI pins. I can't escape the feeling that I am overlooking something simple...any insight is greatly appreciated! I tried to keep the post short, so if I left out any relevant information, please let me know. Thank you.
