added arduino, modified build

arduino/libraries/GSM/examples/ReceiveVoiceCall/ReceiveVoiceCall.ino

@@ -0,0 +1,101 @@
+/*
+ Receive Voice Call
+
+ This sketch, for the Arduino GSM shield, receives voice calls,
+ displays the calling number, waits a few seconds then hangs up.
+
+ Circuit:
+ * GSM shield
+ * Voice circuit. Refer to to the GSM shield getting started guide
+   at http://www.arduino.cc/en/Guide/ArduinoGSMShield#toc11
+ * SIM card that can accept voice calls
+
+ With no voice circuit the call will connect, but will not send or receive sound
+
+ created Mar 2012
+ by Javier Zorzano
+
+ This example is in the public domain.
+
+ http://www.arduino.cc/en/Tutorial/GSMExamplesReceiveVoiceCall
+
+ */
+
+// Include the GSM library
+#include <GSM.h>
+
+// PIN Number
+#define PINNUMBER ""
+
+// initialize the library instance
+GSM gsmAccess;
+GSMVoiceCall vcs;
+
+// Array to hold the number for the incoming call
+char numtel[20];
+
+void setup() {
+  // initialize serial communications and wait for port to open:
+  Serial.begin(9600);
+  while (!Serial) {
+    ; // wait for serial port to connect. Needed for native USB port only
+  }
+
+  Serial.println("Receive Voice Call");
+
+  // connection state
+  boolean notConnected = true;
+
+  // Start GSM shield
+  // If your SIM has PIN, pass it as a parameter of begin() in quotes
+  while (notConnected) {
+    if (gsmAccess.begin(PINNUMBER) == GSM_READY) {
+      notConnected = false;
+    } else {
+      Serial.println("Not connected");
+      delay(1000);
+    }
+  }
+
+  // This makes sure the modem correctly reports incoming events
+  vcs.hangCall();
+
+  Serial.println("Waiting for a call");
+}
+
+void loop() {
+  // Check the status of the voice call
+  switch (vcs.getvoiceCallStatus()) {
+    case IDLE_CALL: // Nothing is happening
+
+      break;
+
+    case RECEIVINGCALL: // Yes! Someone is calling us
+
+      Serial.println("RECEIVING CALL");
+
+      // Retrieve the calling number
+      vcs.retrieveCallingNumber(numtel, 20);
+
+      // Print the calling number
+      Serial.print("Number:");
+      Serial.println(numtel);
+
+      // Answer the call, establish the call
+      vcs.answerCall();
+      break;
+
+    case TALKING:  // In this case the call would be established
+
+      Serial.println("TALKING. Press enter to hang up.");
+      while (Serial.read() != '\n') {
+        delay(100);
+      }
+      vcs.hangCall();
+      Serial.println("Hanging up and waiting for the next call.");
+      break;
+  }
+  delay(1000);
+}
+
+