1 files changed, 58 insertions, 0 deletions
diff --git a/libraries/Firmata/examples/SimpleDigitalFirmata/SimpleDigitalFirmata.pde b/libraries/Firmata/examples/SimpleDigitalFirmata/SimpleDigitalFirmata.pde
new file mode 100644
index 0000000..1104a92
--- /dev/null
+++ b/libraries/Firmata/examples/SimpleDigitalFirmata/SimpleDigitalFirmata.pde
@@ -0,0 +1,58 @@
+/* Supports as many digital inputs and outputs as possible.
+ *
+ * This example code is in the public domain.
+ */
+#include <Firmata.h>
+
+byte previousPIN[2];  // PIN means PORT for input
+byte previousPORT[2]; 
+
+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;
+        Firmata.sendDigitalPort(portNumber, portValue); 
+    }
+}
+
+void setPinModeCallback(byte pin, int mode) {
+    if(pin > 1) { // don't touch RxTx pins (0,1)
+        pinMode(pin, mode);
+    }
+}
+
+void digitalWriteCallback(byte port, int value)
+{
+    byte i;
+    byte currentPinValue, previousPinValue;
+
+    if(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();
+}
+
+void loop()
+{
+    outputPort(0, PIND &~ B00000011); // pins 0-7, ignoring Rx/Tx pins (0/1)
+    outputPort(1, PINB); // pins 8-13
+    while(Firmata.available()) {
+        Firmata.processInput();
+    }
+}