From 9cfc0b882f91aa43758328c4f0b46ef6a4c25280 Mon Sep 17 00:00:00 2001
From: lewisxhe <lewishe@outlook.com>
Date: Tue, 4 Jun 2024 15:33:34 +0800
Subject: [PATCH] Update GT911 example

---
 .../TouchDrv_GT911_GetPoint.ino               | 53 ++++++++++++-------
 platformio.ini                                | 12 +++--
 2 files changed, 43 insertions(+), 22 deletions(-)

diff --git a/examples/TouchDrv_GT911_GetPoint/TouchDrv_GT911_GetPoint.ino b/examples/TouchDrv_GT911_GetPoint/TouchDrv_GT911_GetPoint.ino
index 007282d..e0a2223 100644
--- a/examples/TouchDrv_GT911_GetPoint/TouchDrv_GT911_GetPoint.ino
+++ b/examples/TouchDrv_GT911_GetPoint/TouchDrv_GT911_GetPoint.ino
@@ -58,12 +58,11 @@ void setup()
     Serial.begin(115200);
     while (!Serial);
 
-    Wire.begin(SENSOR_SDA, SENSOR_SCL);
     /*
-    * The touch reset pin uses hardware pull-up,
-    * and the function of setting the I2C device address cannot be used.
-    * Use scanning to obtain the touch device address.
-    * * */
+
+    If the touch reset pin and interrupt pin cannot be controlled by GPIO, the device address cannot be controlled and can only be obtained by scanning.
+
+    Wire.begin(SENSOR_SDA, SENSOR_SCL);
     uint8_t touchAddress = 0;
     Wire.beginTransmission(0x14);
     if (Wire.endTransmission() == 0) {
@@ -79,40 +78,56 @@ void setup()
             delay(1000);
         }
     }
-
     touch.setPins(SENSOR_RST, SENSOR_IRQ);
-
     if (!touch.begin(Wire,  touchAddress, SENSOR_SDA, SENSOR_SCL )) {
         while (1) {
             Serial.println("Failed to find GT911 - check your wiring!");
             delay(1000);
         }
     }
+    * 
+    * * */
+
+    // If the reset pin and interrupt pin can be controlled by GPIO, the device address can be set arbitrarily
+    touch.setPins(SENSOR_RST, SENSOR_IRQ);
+    if (!touch.begin(Wire,  GT911_SLAVE_ADDRESS_H, SENSOR_SDA, SENSOR_SCL )) {
+        while (1) {
+            Serial.println("Failed to find GT911 - check your wiring!");
+            delay(1000);
+        }
+    }
 
     //Set to trigger on falling edge
     touch.setInterruptMode(FALLING);
 
     Serial.println("Init GT911 Sensor success!");
 
+    // Set the center button to trigger the callback , Only for specific devices, e.g LilyGo-EPD47 S3 GT911
+    touch.setHomeButtonCallback([](void *user_data) {
+        Serial.println("Home button pressed!");
+    }, NULL);
+
 }
 
 void loop()
 {
     if (touch.isPressed()) {
         uint8_t touched = touch.getPoint(x, y, touch.getSupportTouchPoint());
-        for (int i = 0; i < touched; ++i) {
-            Serial.print("X[");
-            Serial.print(i);
-            Serial.print("]:");
-            Serial.print(x[i]);
-            Serial.print(" ");
-            Serial.print(" Y[");
-            Serial.print(i);
-            Serial.print("]:");
-            Serial.print(y[i]);
-            Serial.print(" ");
+        if (touched > 0) {
+            for (int i = 0; i < touched; ++i) {
+                Serial.print("X[");
+                Serial.print(i);
+                Serial.print("]:");
+                Serial.print(x[i]);
+                Serial.print(" ");
+                Serial.print(" Y[");
+                Serial.print(i);
+                Serial.print("]:");
+                Serial.print(y[i]);
+                Serial.print(" ");
+            }
+            Serial.println();
         }
-        Serial.println();
     }
     delay(5);
 }
diff --git a/platformio.ini b/platformio.ini
index b818a5c..7e8787e 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -51,18 +51,18 @@
 ; src_dir = examples/TouchDrv_GT911_LilyGo_T_RGB
 ; src_dir = examples/TouchDrv_Interface_T_RGB
 ; src_dir = examples/TouchDrv_FT6232_GetPoint
-; src_dir = examples/TouchDrv_GT911_GetPoint
+src_dir = examples/TouchDrv_GT911_GetPoint
 ; src_dir = examples/TouchDrv_CHSC5816_GetPoint
 ; src_dir = examples/TouchDrv_CSTxxx_GetPoint
 
 
 ; default_envs = esp32-s3n4r2
-; default_envs=esp32s3-opi
+default_envs=esp32s3-opi
 ; default_envs=esp32s3-qspi
 ; default_envs=esp32c3
 ; default_envs=esp32dev
 ; default_envs = rp2040
-default_envs = nrf52840
+; default_envs = nrf52840
 
 ; Custom board variant
 boards_dir = ./board
@@ -123,6 +123,12 @@ build_flags =
     ; -DSENSOR_IRQ=8
     ; -DSENSOR_RST=17
 
+    ; T-EPD47 S3 GT911 2 Point touch✅
+    -DSENSOR_SDA=6
+    -DSENSOR_SCL=5
+    -DSENSOR_IRQ=15
+    -DSENSOR_RST=41
+
     -DCORE_DEBUG_LEVEL=5
     -Wnarrowing
     -Wtype-limits