updated Firmata library to version 2.3.5 and moved to the new library format

libraries/Firmata/examples/SimpleDigitalFirmata/SimpleDigitalFirmata.ino

@@ -0,0 +1,72 @@
+/*
+ * Firmata is a generic protocol for communicating with microcontrollers
+ * from software on a host computer. It is intended to work with
+ * any host computer software package.
+ *
+ * To download a host software package, please clink on the following link
+ * to open the download page in your default browser.
+ *
+ * http://firmata.org/wiki/Download
+ */
+
+/* Supports as many digital inputs and outputs as possible.
+ *
+ * This example code is in the public domain.
+ */
+#include <Firmata.h>
+
+byte previousPIN[TOTAL_PORTS];  // PIN means PORT for input
+byte previousPORT[TOTAL_PORTS]; 
+
+void outputPort(byte portNumber, byte portValue)
+{
+    // only send the data when it changes, otherwise you get too many messages!
+    if (previousPIN[portNumber] != portValue) {
+        Firmata.sendDigitalPort(portNumber, portValue); 
+        previousPIN[portNumber] = portValue;
+    }
+}
+
+void setPinModeCallback(byte pin, int mode) {
+    if (IS_PIN_DIGITAL(pin)) {
+        pinMode(PIN_TO_DIGITAL(pin), mode);
+    }
+}
+
+void digitalWriteCallback(byte port, int value)
+{
+    byte i;
+    byte currentPinValue, previousPinValue;
+
+    if (port < TOTAL_PORTS && value != previousPORT[port]) {
+        for(i=0; i<8; i++) {
+            currentPinValue = (byte) value & (1 << i);
+            previousPinValue = previousPORT[port] & (1 << i);
+            if(currentPinValue != previousPinValue) {
+                digitalWrite(i + (port*8), currentPinValue);
+            }
+        }
+        previousPORT[port] = value;
+    }
+}
+
+void setup()
+{
+    Firmata.setFirmwareVersion(0, 1);
+    Firmata.attach(DIGITAL_MESSAGE, digitalWriteCallback);
+    Firmata.attach(SET_PIN_MODE, setPinModeCallback);
+    Firmata.begin(57600);
+}
+
+void loop()
+{
+    byte i;
+
+    for (i=0; i<TOTAL_PORTS; i++) {
+        outputPort(i, readPort(i, 0xff));
+    }
+
+    while(Firmata.available()) {
+        Firmata.processInput();
+    }
+}