feat(wire): adds a new example using lambda function callback

Author: SuGlider

libraries/Wire/examples/WireSlaveFunctionalCallback/WireSlaveFunctionalCallback.ino

@@ -0,0 +1,37 @@
+// This example demonstrates the use of functional callbacks with the Wire library
+// for I2C slave communication. It shows how to handle requests and data reception
+
+#include "Wire.h"
+
+#define I2C_DEV_ADDR 0x55
+
+uint32_t i = 0;
+
+void setup() {
+  Serial.begin(115200);
+  Serial.setDebugOutput(true);
+
+  Wire.onRequest([]() {
+    Wire.print(i++);
+    Wire.print(" Packets.");
+    Serial.println("onRequest");
+  });
+  
+  Wire.onReceive([](int len) {
+  Serial.printf("onReceive[%d]: ", len);
+    while (Wire.available()) {
+      Serial.write(Wire.read());
+    }
+    Serial.println();
+  });
+
+  Wire.begin((uint8_t)I2C_DEV_ADDR);
+
+#if CONFIG_IDF_TARGET_ESP32
+  char message[64];
+  snprintf(message, 64, "%lu Packets.", i++);
+  Wire.slaveWrite((uint8_t *)message, strlen(message));
+#endif
+}
+
+void loop() {}

libraries/Wire/examples/WireSlaveFunctionalCallback/ci.json

@@ -0,0 +1,5 @@
+{
+  "requires": [
+    "CONFIG_SOC_I2C_SUPPORT_SLAVE=y"
+  ]
+}