From 0887b98f627500271b5ad8b3c4f6c7b90bc227ee Mon Sep 17 00:00:00 2001
From: Thibaut VIARD <thibaut.viard@atmel.com>
Date: Tue, 21 Jun 2011 00:20:43 +0200
Subject: Moving all AVR specific libraries to hardware/avr

---
 .../SimpleDigitalFirmata/SimpleDigitalFirmata.pde  | 61 ++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 libraries/Firmata/examples/SimpleDigitalFirmata/SimpleDigitalFirmata.pde

(limited to 'libraries/Firmata/examples/SimpleDigitalFirmata/SimpleDigitalFirmata.pde')

diff --git a/libraries/Firmata/examples/SimpleDigitalFirmata/SimpleDigitalFirmata.pde b/libraries/Firmata/examples/SimpleDigitalFirmata/SimpleDigitalFirmata.pde
new file mode 100644
index 0000000..64b566e
--- /dev/null
+++ b/libraries/Firmata/examples/SimpleDigitalFirmata/SimpleDigitalFirmata.pde
@@ -0,0 +1,61 @@
+/* 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));
+    }
+
+    while(Firmata.available()) {
+        Firmata.processInput();
+    }
+}
-- 
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