Hello
I have a problem with the "touch-calibrate" code from Bodmer's TFT-eSPI library.
I'll start in order:
I have a Cheap Yellow Display CYD module (ESP32-2432S028R)
(link to data)
Sunton Display url
I have the User_Setup.h file configured correctly (I think).
But after loading the code into Esp32, the display displays correctly but the touch does not respond.
I use this code:
/*
Sketch to generate the setup() calibration values, these are reported
to the Serial Monitor.
The sketch has been tested on the ESP8266 and screen with XPT2046 driver.
*/
#include <SPI.h>
#include <TFT_eSPI.h> // Hardware-specific library
TFT_eSPI tft = TFT_eSPI(); // Invoke custom library
//------------------------------------------------------------------------------------------
void setup() {
// Use serial port
Serial.begin(115200);
// Initialise the TFT screen
tft.init();
// Set the rotation to the orientation you wish to use in your project before calibration
// (the touch coordinates returned then correspond to that rotation only)
tft.setRotation(1);
// Calibrate the touch screen and retrieve the scaling factors
touch_calibrate();
/*
// Replace above line with the code sent to Serial Monitor
// once calibration is complete, e.g.:
uint16_t calData[5] = { 286, 3534, 283, 3600, 6 };
tft.setTouch(calData);
*/
// Clear the screen
tft.fillScreen(TFT_BLACK);
tft.drawCentreString("Touch screen to test!",tft.width()/2, tft.height()/2, 2);
}
//------------------------------------------------------------------------------------------
void loop(void) {
uint16_t x = 0, y = 0; // To store the touch coordinates
// Pressed will be set true is there is a valid touch on the screen
bool pressed = tft.getTouch(&x, &y);
// Draw a white spot at the detected coordinates
if (pressed) {
tft.fillCircle(x, y, 2, TFT_WHITE);
//Serial.print("x,y = ");
//Serial.print(x);
//Serial.print(",");
//Serial.println(y);
}
}
//------------------------------------------------------------------------------------------
// Code to run a screen calibration, not needed when calibration values set in setup()
void touch_calibrate()
{
uint16_t calData[5];
uint8_t calDataOK = 0;
// Calibrate
tft.fillScreen(TFT_BLACK);
tft.setCursor(20, 0);
tft.setTextFont(2);
tft.setTextSize(1);
tft.setTextColor(TFT_WHITE, TFT_BLACK);
tft.println("Touch corners as indicated");
tft.setTextFont(1);
tft.println();
tft.calibrateTouch(calData, TFT_MAGENTA, TFT_BLACK, 15);
Serial.println(); Serial.println();
Serial.println("// Use this calibration code in setup():");
Serial.print(" uint16_t calData[5] = ");
Serial.print("{ ");
for (uint8_t i = 0; i < 5; i++)
{
Serial.print(calData[i]);
if (i < 4) Serial.print(", ");
}
Serial.println(" };");
Serial.print(" tft.setTouch(calData);");
Serial.println(); Serial.println();
tft.fillScreen(TFT_BLACK);
tft.setTextColor(TFT_GREEN, TFT_BLACK);
tft.println("Calibration complete!");
tft.println("Calibration code sent to Serial port.");
delay(4000);
}
But touch don't working.
I have a question about pin configuration.
My module has this Pin configuration for screen and touch.
In User_setup.h I configured the display pins. And where should I configure the pins for touch???
When I use this code to handle touch, everything works fine. But I need to run the code I showed earlier. Unfortunately, no attempts have yielded positive results.
/* Rui Santos & Sara Santos - Random Nerd Tutorials
THIS EXAMPLE WAS TESTED WITH THE FOLLOWING HARDWARE:
1) ESP32-2432S028R 2.8 inch 240×320 also known as the Cheap Yellow Display (CYD): https://makeradvisor.com/tools/cyd-cheap-yellow-display-esp32-2432s028r/
SET UP INSTRUCTIONS: https://RandomNerdTutorials.com/cyd/
2) REGULAR ESP32 Dev Board + 2.8 inch 240x320 TFT Display: https://makeradvisor.com/tools/2-8-inch-ili9341-tft-240x320/ and https://makeradvisor.com/tools/esp32-dev-board-wi-fi-bluetooth/
SET UP INSTRUCTIONS: https://RandomNerdTutorials.com/esp32-tft/
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files.
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*/
#include <SPI.h>
/* Install the "TFT_eSPI" library by Bodmer to interface with the TFT Display - https://github.com/Bodmer/TFT_eSPI
*** IMPORTANT: User_Setup.h available on the internet will probably NOT work with the examples available at Random Nerd Tutorials ***
*** YOU MUST USE THE User_Setup.h FILE PROVIDED IN THE LINK BELOW IN ORDER TO USE THE EXAMPLES FROM RANDOM NERD TUTORIALS ***
FULL INSTRUCTIONS AVAILABLE ON HOW CONFIGURE THE LIBRARY: https://RandomNerdTutorials.com/cyd/ or https://RandomNerdTutorials.com/esp32-tft/ */
#include <TFT_eSPI.h>
// Install the "XPT2046_Touchscreen" library by Paul Stoffregen to use the Touchscreen - https://github.com/PaulStoffregen/XPT2046_Touchscreen
// Note: this library doesn't require further configuration
#include <XPT2046_Touchscreen.h>
TFT_eSPI tft = TFT_eSPI();
// Touchscreen pins
#define XPT2046_IRQ 36 // T_IRQ
#define XPT2046_MOSI 32 // T_DIN
#define XPT2046_MISO 39 // T_OUT
#define XPT2046_CLK 25 // T_CLK
#define XPT2046_CS 33 // T_CS
SPIClass touchscreenSPI = SPIClass(VSPI);
XPT2046_Touchscreen touchscreen(XPT2046_CS, XPT2046_IRQ);
#define SCREEN_WIDTH 320
#define SCREEN_HEIGHT 240
#define FONT_SIZE 2
// Touchscreen coordinates: (x, y) and pressure (z)
int x, y, z;
// Print Touchscreen info about X, Y and Pressure (Z) on the Serial Monitor
void printTouchToSerial(int touchX, int touchY, int touchZ) {
Serial.print("X = ");
Serial.print(touchX);
Serial.print(" | Y = ");
Serial.print(touchY);
Serial.print(" | Pressure = ");
Serial.print(touchZ);
Serial.println();
}
// Print Touchscreen info about X, Y and Pressure (Z) on the TFT Display
void printTouchToDisplay(int touchX, int touchY, int touchZ) {
// Clear TFT screen
tft.fillScreen(TFT_WHITE);
tft.setTextColor(TFT_BLACK, TFT_WHITE);
int centerX = SCREEN_WIDTH / 2;
int textY = 80;
String tempText = "X = " + String(touchX);
tft.drawCentreString(tempText, centerX, textY, FONT_SIZE);
textY += 20;
tempText = "Y = " + String(touchY);
tft.drawCentreString(tempText, centerX, textY, FONT_SIZE);
textY += 20;
tempText = "Pressure = " + String(touchZ);
tft.drawCentreString(tempText, centerX, textY, FONT_SIZE);
}
void setup() {
Serial.begin(115200);
// Start the SPI for the touchscreen and init the touchscreen
touchscreenSPI.begin(XPT2046_CLK, XPT2046_MISO, XPT2046_MOSI, XPT2046_CS);
touchscreen.begin(touchscreenSPI);
// Set the Touchscreen rotation in landscape mode
// Note: in some displays, the touchscreen might be upside down, so you might need to set the rotation to 3: touchscreen.setRotation(3);
touchscreen.setRotation(1);
// Start the tft display
tft.init();
// Set the TFT display rotation in landscape mode
tft.setRotation(1);
// Clear the screen before writing to it
tft.fillScreen(TFT_WHITE);
tft.setTextColor(TFT_BLACK, TFT_WHITE);
// Set X and Y coordinates for center of display
int centerX = SCREEN_WIDTH / 2;
int centerY = SCREEN_HEIGHT / 2;
tft.drawCentreString("Hello, world!", centerX, 30, FONT_SIZE);
tft.drawCentreString("Touch screen to test", centerX, centerY, FONT_SIZE);
}
void loop() {
// Checks if Touchscreen was touched, and prints X, Y and Pressure (Z) info on the TFT display and Serial Monitor
if (touchscreen.tirqTouched() && touchscreen.touched()) {
// Get Touchscreen points
TS_Point p = touchscreen.getPoint();
// Calibrate Touchscreen points with map function to the correct width and height
x = map(p.x, 200, 3700, 1, SCREEN_WIDTH);
y = map(p.y, 240, 3800, 1, SCREEN_HEIGHT);
z = p.z;
printTouchToSerial(x, y, z);
printTouchToDisplay(x, y, z);
delay(100);
}
}
I also add the User_Setup.h file to show how my pins are configured.
User_Setup.h (18.6 KB)
Please give me some advice. I suspect that the problem is the pin configuration.
