Problem with ESP32 and ili9488 capacitive-GT911 touch screen

[RSanchez888]

Dear Bodmer,
I am not very experience with these boards and programming, but I am trying to control this ili9488 capacitive screen (https://es.aliexpress.com/item/1005004083478309.html?spm=a2g0o.cart.0.0.413f7a9dT3jQJE&mp=1&gatewayAdapt=glo2esp)
with this ESP32 board (https://es.aliexpress.com/item/1005004337178335.htmlspm=a2g0o.cart.0.0.413f7a9dT3jQJE&mp=1&gatewayAdapt=glo2esp)

For the moment, I managed to make the screen and SD work, but I had no success with the touch control. I´ve tried different wiring diagrams but no way. Could you please share the complete and correct TFT, SD and touch wiring I should use, according to my TFT screen and ESP32 board.
I would appreciate if you can suggest a code for testing the correct functioning.
Thanks in advance.

[Bodmer]

The TFT_eSPI library does not not incorporate that touch controller but it could be used with an independant library. A quick Google came up with this video:
https://www.youtube.com/watch?v=WyyrxYFd2C4

Although that is without a screen the principles are the same. And this further link from the video which has test sketches and a good explanation of how to connect up and get it working:
http://www.digitaltown.co.uk/components14ESP32GT911Screen.php

This library can be used to add touch support for the GT911:

https://github.com/TAMCTec/gt911-arduino

[Bodmer]

Great, well done!

[DeanK2022]

@RSanchez888 I have one of those ordered, would you be so kind as to share wiring diagrams and how to get the right drivers loaded for GT911 please?
Are you using setup21_ILI9488.H or setup20_ILI9488.h ?

[RSanchez888]

Hi there! please find the wiring details for an ESP32 devkit v1 and a capacitive touch TFT ILI9488 (GT911)

TFT Pin number on ESP32
Vcc 3.3V
GND GND
CS 5
RST 16
D/C 17
MOSI 23
SCK 18
LED 3.3V
MISO not connected

TOUCH
Int 2
SDA 21
RST 13
SCL 22

SDcard reader
CS 5
MOSI 23
MISO 19
SCK 18

This was tested using the following code, which was modified from other available examples. It will display different geometric shapes and colors, but at some point the image freezes until you touch the screen and it will show a message on the TFT (hellow world) read from a file previously saved on the SDcard. Make sure you define correctly the Pins in the code.

I hope this works for you!
Cheers

`#include <ILI9486_SPI.h> //Hardware-specific library
#include "TAMC_GT911.h"
#include "SD.h"
#include "FS.h"

// adapt the constructor parameters to your wiring for the appropriate processor conditional,
// or add a new one or adapt the catch all other default

#if (defined(TEENSYDUINO) && (TEENSYDUINO == 147))
ILI9486_SPI tft(/CS=/ 10, /DC=/ 15, /RST=/ 14);
// for my wirings used for e-paper displays:
#elif defined (ESP8266)
ILI9486_SPI tft(/CS=D8/ SS, /DC=D3/ 0, /RST=D4/ 2); // my D1 mini connection shield for e-paper displays
//ILI9486_SPI tft(/CS=D8/ SS, /DC=D4/ 2, /RST=D3/ 0); // my proto board for RPi display
#elif defined(ESP32)
ILI9486_SPI tft(/CS=5/ SS, /DC=/ 17, /RST=/ 16);
#elif defined(BOARD_GENERIC_STM32F103C_H)
ILI9486_SPI tft(/CS=4/ SS, /DC=/ 3, /RST=/ 2);
#elif defined(__AVR)
ILI9486_SPI tft(/CS=10/ SS, /DC=/ 8, /RST=/ 9);
#elif defined(ARDUINO_ARCH_SAM)
ILI9486_SPI tft(/CS=10/ SS, /DC=/ 6, /RST=/ 5); // my proto board
#elif defined(ARDUINO_ARCH_SAMD)
// mapping suggestion for Arduino MKR1000 or MKRZERO
// note: can't use SS on MKR1000: is defined as 24, should be 4
// BUSY -> 5, RST -> 6, DC -> 7, CS-> 4, CLK -> 9, DIN -> 8 // my e-paper connector
ILI9486_SPI tft(/CS=/ 4, /DC=/ 7, /RST=/ 6); // to my proto board
#else
// catch all other default
ILI9486_SPI tft(/CS=10/ SS, /DC=/ 8, /RST=/ 9);
#endif

#if !defined(ESP32)
#define yield()
#endif

#define BLACK 0x0000
#define BLUE 0x001F
#define RED 0xF800
#define GREEN 0x07E0
#define CYAN 0x07FF
#define MAGENTA 0xF81F
#define YELLOW 0xFFE0
#define WHITE 0xFFFF

#define TOUCH_SDA 21
#define TOUCH_SCL 22
#define TOUCH_INT 2
#define TOUCH_RST 13
#define TOUCH_WIDTH 480
#define TOUCH_HEIGHT 320

TAMC_GT911 tp = TAMC_GT911(TOUCH_SDA, TOUCH_SCL, TOUCH_INT, TOUCH_RST, TOUCH_WIDTH, TOUCH_HEIGHT);

void setup()
{
delay(500);
Serial.begin(115200);
delay(500);
while(!Serial) yield();
delay(500);
Serial.println();
Serial.println("setup");

// uncomment for normal SPI mode; default true used for "special" SPI circuit found e.g. on 3.5" RPI HVGA display
tft.setSpiKludge(false); // false to disable rpi_spi16_mode

tft.init();
tp.begin();
tp.setRotation(ROTATION_NORMAL);

if(!SD.begin()){
Serial.println("Card Mount Failed");
return;
}
uint8_t cardType = SD.cardType();

if(cardType == CARD_NONE){
Serial.println("No SD card attached");
return;
}

createDir(SD, "/mydir");
writeFile(SD, "/hello.txt", "Hello world");

}

void loop(void)
{
tp.read();
if(tp.isTouched){
//return;
for (int i=0; i<tp.touches; i++){
Serial.print("Touch ");Serial.print(i+1);Serial.print(": ");;
Serial.print(" x: ");Serial.print(tp.points[i].x);
Serial.print(" y: ");Serial.print(tp.points[i].y);
Serial.print(" size: ");Serial.println(tp.points[i].size);
Serial.println(' ');
}

readFile(SD, "/hello.txt");
}

}

void createDir(fs::FS &fs, const char * path){
Serial.printf("Creating Dir: %s\n", path);
if(fs.mkdir(path)){
Serial.println("Dir created");
} else {
Serial.println("mkdir failed");
}
}

void readFile(fs::FS &fs, const char * path){
Serial.printf("Reading file: %s\n", path);

File file = fs.open(path);
if(!file){
    Serial.println("Failed to open file for reading");
    return;
}

Serial.print("Read from file: ");
tft.fillScreen(BLACK);
unsigned long start = micros();
tft.setCursor(0, 0);
tft.setTextColor(YELLOW);  
tft.setTextSize(3);

while(file.available()){
  tft.print((char)file.read());
}

file.close();

}

void writeFile(fs::FS &fs, const char * path, const char * message){
Serial.printf("Writing file: %s\n", path);

File file = fs.open(path, FILE_WRITE);
if(!file){
    Serial.println("Failed to open file for writing");
    return;
}
if(file.print(message)){
    Serial.println("File written");
} else {
    Serial.println("Write failed");
}
file.close();

}

unsigned long testFillScreen() {
unsigned long start = micros();
tft.fillScreen(BLACK);
yield();
//if (controller.ID == 0x8875) delay(200); // too fast to be seen
tft.fillScreen(RED);
yield();
//if (controller.ID == 0x8875) delay(200); // too fast to be seen
tft.fillScreen(GREEN);
yield();
//if (controller.ID == 0x8875) delay(200); // too fast to be seen
tft.fillScreen(BLUE);
yield();
//if (controller.ID == 0x8875) delay(200); // too fast to be seen
tft.fillScreen(BLACK);
yield();
tft.setRotation(1);
//if (controller.ID == 0x8875) delay(200); // too fast to be seen
tft.fillScreen(RED);
yield();
//if (controller.ID == 0x8875) delay(200); // too fast to be seen
tft.fillScreen(GREEN);
yield();
//if (controller.ID == 0x8875) delay(200); // too fast to be seen
tft.fillScreen(BLUE);
yield();
//if (controller.ID == 0x8875) delay(200); // too fast to be seen
tft.fillScreen(BLACK);
yield();
tft.setRotation(0);
return micros() - start;
}

unsigned long testText() {
tft.fillScreen(BLACK);
unsigned long start = micros();
tft.setCursor(0, 0);
tft.setTextColor(WHITE); tft.setTextSize(1);
tft.println("Hello World!");
tft.setTextColor(YELLOW); tft.setTextSize(2);
tft.println(1234.56);
tft.setTextColor(RED); tft.setTextSize(3);
tft.println(0xDEADBEEF, HEX);
tft.println();
tft.setTextColor(GREEN);
tft.setTextSize(5);
tft.println("Groop");
tft.setTextSize(2);
tft.println("I implore thee,");
tft.setTextSize(1);
tft.setTextColor(GREEN);
tft.println("my foonting turlingdromes.");
tft.println("And hooptiously drangle me");
tft.println("with crinkly bindlewurdles,");
tft.println("Or I will rend thee");
tft.println("in the gobberwarts");
tft.println("with my blurglecruncheon,");
tft.println("see if I don't!");
return micros() - start;
}

unsigned long testLines(uint16_t color) {
unsigned long start, t;
int x1, y1, x2, y2,
w = tft.width(),
h = tft.height();

tft.fillScreen(BLACK);
yield();

x1 = y1 = 0;
y2 = h - 1;
start = micros();
for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
yield();
x2 = w - 1;
for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
yield();
t = micros() - start; // fillScreen doesn't count against timing

tft.fillScreen(BLACK);
yield();

x1 = w - 1;
y1 = 0;
y2 = h - 1;
start = micros();
for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
yield();
x2 = 0;
for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
yield();
t += micros() - start;

tft.fillScreen(BLACK);
yield();

x1 = 0;
y1 = h - 1;
y2 = 0;
start = micros();
for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
yield();
x2 = w - 1;
for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
yield();
t += micros() - start;

tft.fillScreen(BLACK);
yield();

x1 = w - 1;
y1 = h - 1;
y2 = 0;
start = micros();
for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
yield();
x2 = 0;
for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
yield();

return micros() - start;
}

unsigned long testFastLines(uint16_t color1, uint16_t color2) {
unsigned long start;
int x, y, w = tft.width(), h = tft.height();

tft.fillScreen(BLACK);
yield();
start = micros();
for (y = 0; y < h; y += 5) tft.drawFastHLine(0, y, w, color1);
yield();
for (x = 0; x < w; x += 5) tft.drawFastVLine(x, 0, h, color2);
yield();

return micros() - start;
}

unsigned long testRects(uint16_t color) {
unsigned long start;
int n, i, i2,
cx = tft.width() / 2,
cy = tft.height() / 2;

tft.fillScreen(BLACK);
n = min(tft.width(), tft.height());
start = micros();
for (i = 2; i < n; i += 6) {
i2 = i / 2;
tft.drawRect(cx - i2, cy - i2, i, i, color);
}

return micros() - start;
}

unsigned long testFilledRects(uint16_t color1, uint16_t color2) {
unsigned long start, t = 0;
int n, i, i2,
cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;

tft.fillScreen(BLACK);
n = min(tft.width(), tft.height());
for (i = n; i > 0; i -= 6) {
i2 = i / 2;
start = micros();
tft.fillRect(cx - i2, cy - i2, i, i, color1);
t += micros() - start;
// Outlines are not included in timing results
tft.drawRect(cx - i2, cy - i2, i, i, color2);
yield();
}

return t;
}

unsigned long testFilledCircles(uint8_t radius, uint16_t color) {
unsigned long start;
int x, y, w = tft.width(), h = tft.height(), r2 = radius * 2;

tft.fillScreen(BLACK);
start = micros();
for (x = radius; x < w; x += r2) {
for (y = radius; y < h; y += r2) {
tft.fillCircle(x, y, radius, color);
}
yield();
}

return micros() - start;
}

unsigned long testCircles(uint8_t radius, uint16_t color) {
unsigned long start;
int x, y, r2 = radius * 2,
w = tft.width() + radius,
h = tft.height() + radius;

// Screen is not cleared for this one -- this is
// intentional and does not affect the reported time.
start = micros();
for (x = 0; x < w; x += r2) {
for (y = 0; y < h; y += r2) {
tft.drawCircle(x, y, radius, color);
}
yield();
}

return micros() - start;
}

unsigned long testTriangles() {
unsigned long start;
int n, i, cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;

tft.fillScreen(BLACK);
n = min(cx, cy);
start = micros();
for (i = 0; i < n; i += 5) {
tft.drawTriangle(
cx , cy - i, // peak
cx - i, cy + i, // bottom left
cx + i, cy + i, // bottom right
tft.color565(0, 0, i));
}

return micros() - start;
}

unsigned long testFilledTriangles() {
unsigned long start, t = 0;
int i, cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;

tft.fillScreen(BLACK);
start = micros();
for (i = min(cx, cy); i > 10; i -= 5) {
start = micros();
tft.fillTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
tft.color565(0, i, i));
t += micros() - start;
tft.drawTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
tft.color565(i, i, 0));
yield();
}

return t;
}

unsigned long testRoundRects() {
unsigned long start;
int w, i, i2,
cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;

tft.fillScreen(BLACK);
w = min(tft.width(), tft.height());
start = micros();
for (i = 0; i < w; i += 6) {
i2 = i / 2;
tft.drawRoundRect(cx - i2, cy - i2, i, i, i / 8, tft.color565(i, 0, 0));
}

return micros() - start;
}

unsigned long testFilledRoundRects() {
unsigned long start;
int i, i2,
cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;

tft.fillScreen(BLACK);
start = micros();
for (i = min(tft.width(), tft.height()); i > 20; i -= 6) {
i2 = i / 2;
tft.fillRoundRect(cx - i2, cy - i2, i, i, i / 8, tft.color565(0, i, 0));
yield();
}

return micros() - start;
}

#if 0
void testEllipses()
{
tft.fillScreen(BLACK);
for (int i = 0; i < 40; i++)
{
int rx = random(60);
int ry = random(60);
int x = rx + random(480 - rx - rx);
int y = ry + random(320 - ry - ry);
tft.fillEllipse(x, y, rx, ry, random(0xFFFF));
}
delay(2000);
tft.fillScreen(BLACK);
for (int i = 0; i < 40; i++)
{
int rx = random(60);
int ry = random(60);
int x = rx + random(480 - rx - rx);
int y = ry + random(320 - ry - ry);
tft.drawEllipse(x, y, rx, ry, random(0xFFFF));
}
delay(2000);
}

void testCurves()
{
uint16_t x = tft.width() / 2;
uint16_t y = tft.height() / 2;
tft.fillScreen(BLACK);

tft.drawEllipse(x, y, 100, 60, PURPLE);
tft.fillCurve(x, y, 80, 30, 0, CYAN);
tft.fillCurve(x, y, 80, 30, 1, MAGENTA);
tft.fillCurve(x, y, 80, 30, 2, YELLOW);
tft.fillCurve(x, y, 80, 30, 3, RED);
delay(2000);

tft.drawCurve(x, y, 90, 50, 0, CYAN);
tft.drawCurve(x, y, 90, 50, 1, MAGENTA);
tft.drawCurve(x, y, 90, 50, 2, YELLOW);
tft.drawCurve(x, y, 90, 50, 3, RED);
tft.fillCircle(x, y, 30, BLUE);
delay(5000);
}
#endif`

[DeanK2022]

Thanks so much, @RSanchez888.
Very much appreciated. 5 days until the board arrives!

[DeanK2022]

Well, got the screen working for display, at least. tp.read() always returns 0 internally in the call:
uint8_t pointInfo = readByteData(GT911_POINT_INFO);

when being touched; it should be capitative touch, I have re-wired and moved the pin connections about as below:
#define TFT_MOSI 23 // Master out slave in
#define TFT_SCLK 18 //Clock sig
#define TFT_CS 14 // Chip select control pin
#define TFT_DC 27 // Data Command control pin
#define TFT_RST 22 // Reset pin (could connect to RST pin)
#define TFT_BL 32 // LED back-light control pin
#define TFT_BACKLIGHT_ON HIGH // Level to turn ON back-light (HIGH or LOW)

#define TOUCH_INT 25
#define TOUCH_SDA 4
#define TOUCH_RST 26
#define TOUCH_SCL 5
#define TOUCH_CS 33 // not connected but tft_eSPI seems to like it for compilation and -1 causes GPIO output error.

I wonder if the i2c address is correct? This is from the TAMC_GT911.h file:
#define GT911_ADDR1 (uint8_t)0x5D
#define GT911_ADDR2 (uint8_t)0x14

and yet based on the GT911 datasheet I read this:
(based on doc from 2013-01-08)
GT911 has 2 sets of slave address 0xBA/0xBB & 0x28/29. Master can control Reset& INT pin to configure the slave address in power on initial state

Has the i2c address been updated since the TAMC lib was written I wonder? Bit of a n00b here so no idea how to proceed really.

[daniu-de]

@RSanchez888 thank you very much for your input here. I got your script to run (even there seem to be some characters lost)

However I wonder why you did not use Bodmers library for the display part. That is possible and so you can keep all the good work from this library

To achieve that you need to remove the calibration from Bodmers scripts and add all the necessary stuff from the TAMCTec library. Rotation needs to be set like this:

TFT - Touch:
1 - ROTATION_RIGHT
2 - ROTATION_NORMAL
3 - ROTATION_LEFT
4 - ROTATION_INVERTED

However "NORMAL" did not work for me.

Your pinning works with this ...

TFT:
#define TFT_MISO 19 // Just left it in there but did not connect any pin should I? Where?
#define TFT_MOSI 23
#define TFT_SCLK 18
#define TFT_CS 5 // Chip select control pin
#define TFT_DC 17 // Data Command control pin
#define TFT_RST 16 // Reset pin (could connect to RST pin)

Touch:
#define TOUCH_SDA 21
#define TOUCH_SCL 22
#define TOUCH_INT 2
#define TOUCH_RST 13

Make sure you adjust width and height to the orientation:
for portrait:
#define TOUCH_WIDTH 320
#define TOUCH_HEIGHT 480
for horizintal:
#define TOUCH_WIDTH 480
#define TOUCH_HEIGHT 320
(of course :-))

Of course you need to take care of reading the touch values yourself wherever needed

regards

[DeanK2022]

Also check that the ../configs folder is actually the one you think you're using, on my machine this is C:\Users\dean\AppData\Local\Arduino\libraries\GUIslice\src
Arduino needs the build folder to be where it is expecting it - if I put all the files in C:\temp\GUIslice\src the build would fail

[BMWK1]

@DeanK2022 I just found your Github repo.... First, many thanks , so great you shared your GT911 solution with capacitive touch, i ran the example successfully without any change with my config ! i was wondering if the touch function of the screen was alive.... and now i know it is.

Well , i dowloaded your GUIslice subject too, but with less success." out of the box"

I tried with my project from GUIslice builder, and tried the ex_07_ard_slider example with the same compil errors:
c:\Users\Christian\Documents\Arduino\libraries\GUIslice\src\GUIslice_drv_tft_espi.cpp: In function 'bool gslc_TDrvInitTouch(gslc_tsGui*, const char*)':
c:\Users\Christian\Documents\Arduino\libraries\GUIslice\src\GUIslice_drv_tft_espi.cpp:1674:19: error: 'TOUCH_CLOCK' was not declared in this scope
Wire.setClock(TOUCH_CLOCK);
^~~~~~~~~~~
c:\Users\Christian\Documents\Arduino\libraries\GUIslice\src\GUIslice_drv_tft_espi.cpp:1677:38: error: 'TOUCH_INT' was not declared in this scope
bool touchInitOK = m_touch.begin(TOUCH_INT, TOUCH_RST, GT911_I2C_ADDR_BA);
^~~~~~~~~
c:\Users\Christian\Documents\Arduino\libraries\GUIslice\src\GUIslice_drv_tft_espi.cpp:1677:38: note: suggested alternative: 'STRUCT_END'
bool touchInitOK = m_touch.begin(TOUCH_INT, TOUCH_RST, GT911_I2C_ADDR_BA);
^~~~~~~~~
STRUCT_END
c:\Users\Christian\Documents\Arduino\libraries\GUIslice\src\GUIslice_drv_tft_espi.cpp:1677:49: error: 'TOUCH_RST' was not declared in this scope
bool touchInitOK = m_touch.begin(TOUCH_INT, TOUCH_RST, GT911_I2C_ADDR_BA);
^~~~~~~~~
c:\Users\Christian\Documents\Arduino\libraries\GUIslice\src\GUIslice_drv_tft_espi.cpp:1677:49: note: suggested alternative: 'TFT_RST'
bool touchInitOK = m_touch.begin(TOUCH_INT, TOUCH_RST, GT911_I2C_ADDR_BA);
^~~~~~~~~
TFT_RST

i verified that the "esp-tftespi-default-gt911.h" was set, maybe a question of pin definition somewhere ?

[DeanK2022]

This is just a number, in the file
TFT_eSPI\User_Setup.h
You should have a line
#define TOUCH_CLOCK 400000

[BMWK1]

In fact, i added the pins definitions:
#define TOUCH_CLOCK 400000
#define TOUCH_INT 25
#define TOUCH_RST 26

And it works with ex02 button example!

So, i can start designing my GUI, and building the electronical interface....

without your help, i was about to give up, buying a resistive touch screen....

[DeanK2022]

Excellent! In GUISlice there is a Debug option that adds more logging and also puts a dot on the screen when a touch is registered.
Best of luck!

[DeanK2022]

Is it LVGL friendly? How may we make it work with the LVGL library? Thanks !!
The gt911 driver in that repo should be able to operate with LVGL but I don't really know how LVLG works internally to hook messages from the touch screen libs. Happy to answer specific questions if you get stuck though.

[RSanchez888]

To whom may be interested. I already manage to make the capacitive ILI9488 work on a DOIT ESP32 devkit v1; the code below is an example based on TFT_eSPI, TJpg_Decoder and TAMC_GT911 libraries. All you need to do is to insert in the code the filenames of the jpg images (480x320) you want to show on the TFT from the SD card. Each image will appear on the TFT after each touch; the only issue I have is that it seems that single touches are detected as double touches, I do not know why. Any help or comments are welcome, thanks!

Wiring:
TFT Pin number on ESP32
Vcc 3.3V
GND GND
CS 14
RST 16
D/C 17
MOSI 23
SCK 18
LED 3.3V
MISO not connected
TOUCH
Int 2
SDA 21
RST 15
SCL 22
SDcard reader
CS 5
MOSI 23
MISO 19
SCK 18

Code
`#include <TFT_eSPI.h> //Hardware-specific library
#include "TAMC_GT911.h"
#include "SD.h"
#include "FS.h"
#include "SPI.h"
#include <TJpg_Decoder.h>

#if !defined(ESP32)
#define yield()
#endif

#define FS_NO_GLOBALS

#ifdef ESP32
#include "SPIFFS.h" // ESP32 only
#endif

#define BLACK 0x0000
#define BLUE 0x001F
#define RED 0xF800
#define GREEN 0x07E0
#define CYAN 0x07FF
#define MAGENTA 0xF81F
#define YELLOW 0xFFE0
#define WHITE 0xFFFF

#define TOUCH_SDA 21
#define TOUCH_SCL 22
#define TOUCH_INT 2
#define TOUCH_RST 15
#define TOUCH_WIDTH 480
#define TOUCH_HEIGHT 320

#define SD_CS 5

TAMC_GT911 tp = TAMC_GT911(TOUCH_SDA, TOUCH_SCL, TOUCH_INT, TOUCH_RST, TOUCH_WIDTH, TOUCH_HEIGHT);

TFT_eSPI tft = TFT_eSPI();

int touchCounter = 0;

// This next function will be called during decoding of the jpeg file to
// render each block to the TFT. If you use a different TFT library
// you will need to adapt this function to suit.
bool tft_output(int16_t x, int16_t y, uint16_t w, uint16_t h, uint16_t* bitmap)
{
// Stop further decoding as image is running off bottom of screen
if ( y >= tft.height() ) return 0;

// This function will clip the image block rendering automatically at the TFT boundaries
tft.pushImage(x, y, w, h, bitmap);

// This might work instead if you adapt the sketch to use the Adafruit_GFX library
// tft.drawRGBBitmap(x, y, bitmap, w, h);

// Return 1 to decode next block
return 1;
}

void setup()
{
delay(500);
Serial.begin(115200);
delay(500);
while(!Serial) yield();
delay(500);

digitalWrite(22, HIGH); // Touch controller chip select (if used)
digitalWrite(14, HIGH); // TFT screen chip select
digitalWrite(5, HIGH); // SD card chips select, must use GPIO 5 (ESP32 SS)

tft.begin();
tft.setTextColor(0xFFFF, 0x0000);
tft.fillScreen(TFT_BLACK);
tft.setSwapBytes(true); // We need to swap the colour bytes (endianess)
tft.setRotation(3);

tp.begin();
tp.setRotation(ROTATION_NORMAL);

if(!SD.begin()){
Serial.println("Card Mount Failed");
return;
}

uint8_t cardType = SD.cardType();

if(cardType == CARD_NONE){
Serial.println("No SD card attached");
return;
}

// The jpeg image can be scaled by a factor of 1, 2, 4, or 8

TJpgDec.setJpgScale(1);
// The decoder must be given the exact name of the rendering function above
TJpgDec.setCallback(tft_output);
}

void loop(void)
{
tp.read();

if(tp.isTouched){
touchCounter = touchCounter + 1;
uint16_t w = 0, h = 0;
if(touchCounter % 2 == 1){
Serial.print("touch counter impar: ");
Serial.println(touchCounter);

  // Draw the image, top left at 0,0
  TJpgDec.drawSdJpg(0, 0, "/Image1_480x320.jpg");

} else if (touchCounter % 2 == 0){
  Serial.print("touch counter par: ");
  Serial.println(touchCounter);  

  // Draw the image, top left at 0,0
  TJpgDec.drawSdJpg(0, 0, "/Image2_480x320.jpg");
}

}

}
`