add i2c scan example

examples/Advanced/i2c_tester/i2c_tester.ino

@@ -0,0 +1,62 @@
+/*
+ * SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <M5CoreS3.h>
+
+void setup()
+{
+    CoreS3.begin();
+    CoreS3.Display.setTextColor(YELLOW);            // Set the font color to yellow.
+    CoreS3.Display.setTextSize(2);                  // Set the font size to 2.
+    CoreS3.Display.println("M5CoreS3 I2C Tester");  // Print a string on the screen.
+    CoreS3.Ex_I2C.begin();
+    CoreS3.In_I2C.begin();
+}
+
+int textColor = YELLOW;
+
+void runScan(m5::I2C_Class &i2c)
+{
+    int address;
+    for (address = 8; address < 0x78; address++) {
+        if (i2c.start(address, false, 400000) && i2c.stop()) {
+            CoreS3.Display.print(address, HEX);
+            CoreS3.Display.print(" ");
+            Serial.print(address, HEX);
+            Serial.print(" ");
+        } else {
+            CoreS3.Display.print(".");
+            Serial.print(".");
+        }
+
+        delay(10);
+    }
+    if (textColor == YELLOW) {
+        textColor = CYAN;
+    } else {
+        textColor = YELLOW;
+    }
+    CoreS3.Display.setTextColor(textColor, BLACK);
+}
+
+void loop()
+{
+    int count = 5;
+    CoreS3.Display.clear();
+    while (count--) {
+        CoreS3.Display.setCursor(0, 0);
+        CoreS3.Display.println("Ex I2C Address [HEX]");
+        runScan(CoreS3.Ex_I2C);
+    }
+    count = 5;
+    CoreS3.Display.clear();
+
+    while (count--) {
+        CoreS3.Display.setCursor(0, 0);
+        CoreS3.Display.println("In I2C Address [HEX]");
+        runScan(CoreS3.In_I2C);
+    }
+}