examples: Added examples fro GPIO functions.

Signed-off-by: MDin <[email protected]>

Author: dineshgit411

examples/blink/blink.ino

@@ -0,0 +1,17 @@
+#include "Arduino.h"
+int val = 0;
+void setup()
+{
+    pinMode(LED_BUILTIN, OUTPUT); 
+    pinMode(23, OUTPUT);
+}
+
+void loop()
+{
+    digitalWrite(LED_BUILTIN, 0);
+    digitalWrite(23, val);
+    delay(1000);
+    digitalWrite(LED_BUILTIN, 1);
+    digitalWrite(23, 1);
+    delay(1000);
+}

examples/button/button.ino

@@ -0,0 +1,15 @@
+#include "Arduino.h"
+int ledPin = 22;  // LED connected to digital pin 13
+    int inPin = 25;    // pushbutton connected to digital pin 7
+    int val;      // variable to store the read value
+
+    void setup() {
+      pinMode(ledPin, OUTPUT);  // sets the digital pin 13 as output
+      pinMode(inPin, INPUT_PULLDOWN);    // sets the digital pin 7 as input
+    }
+
+    void loop() {
+      val = digitalRead(inPin);   // read the input pin
+      digitalWrite(ledPin, val);  // sets the LED to the button's value
+    }
+