add touch management in LVGLDemo example

Author: leonardocavagnis

libraries/H7_Video/examples/LVGLDemo/LVGLDemo.ino

@@ -1,11 +1,15 @@
 #include "H7_Video.h" 
 #include "lvgl.h"
+#include "giga_touch.h"
 
 H7_Video Display(480,800);
 
 //@TODO: Complete demo with 4 main features + touch management
 
 void setup() {
+  Serial.begin(115200);
+  giga_touch_setup();
+
   Display.begin();
 
   /* Change the active screen's background color */
@@ -19,6 +23,9 @@ void setup() {
 }
 
 void loop() { 
+  /* Touch handler */
+  giga_touch_loop();
+  
   /* Feed LVGL engine */
   lv_timer_handler();
 }

libraries/H7_Video/examples/LVGLDemo/giga_touch.cpp

@@ -0,0 +1,73 @@
+#include <Wire.h>
+#include "Goodix.h"  // Arduino_GT911_Library
+#include "pinDefinitions.h"
+
+Goodix touch = Goodix();
+
+REDIRECT_STDOUT_TO(Serial);
+
+#ifdef ARDUINO_GIGA
+#define Wire Wire1
+#define INT_PIN PinNameToIndex(PI_1)
+#define RST_PIN PinNameToIndex(PI_2)
+#endif
+
+#ifdef ARDUINO_PORTENTA_H7_M7
+#define Wire Wire2
+#define INT_PIN PinNameToIndex(PD_4)
+#define RST_PIN PinNameToIndex(PD_5)
+#endif
+
+uint16_t touchpad_x;
+uint16_t touchpad_y;
+bool touchpad_pressed;
+
+void handleTouch(int8_t contacts, GTPoint *points) {
+  touchpad_pressed = true;
+  printf("Contacts: %d\n", contacts);
+  for (uint8_t i = 0; i < contacts; i++) {
+    if (i == 0) {
+      touchpad_x = points[i].x;
+      touchpad_y = points[i].y;
+    }
+    printf("C%d: #%d %d,%d s:%d\n", i, points[i].trackId, points[i].x, points[i].y, points[i].area);
+    yield();
+  }
+}
+
+void touchStart() {
+  if (touch.begin(INT_PIN, RST_PIN, 0xDD) != true) {
+    Serial.println("! Module reset failed");
+  } else {
+    Serial.println("Module reset OK");
+  }
+
+  Serial.print("Check ACK on addr request on 0x");
+  Serial.print(touch.i2cAddr, HEX);
+
+  Wire.beginTransmission(touch.i2cAddr);
+  Wire.write(0);
+  int error = Wire.endTransmission();
+  if (error == 0) {
+    Serial.println(": SUCCESS");
+  } else {
+    Serial.print(": ERROR #");
+    Serial.println(error);
+  }
+}
+
+void giga_touch_setup() {
+  Serial.println("\nGoodix GT911x touch driver");
+
+  Wire.setClock(400000);
+  Wire.begin();
+  delay(300);
+
+  touch.setHandler(handleTouch);
+  touchStart();
+}
+
+void giga_touch_loop() {
+  touch.loop();
+  delay(1);
+}

libraries/H7_Video/examples/LVGLDemo/giga_touch.h

@@ -0,0 +1,6 @@
+extern uint16_t touchpad_x;
+extern uint16_t touchpad_y;
+extern bool touchpad_pressed;
+
+void giga_touch_setup();
+void giga_touch_loop();