First commit

I2C Scan/src/main.cpp

@@ -0,0 +1,54 @@
+#include <Arduino.h>
+
+// I2C Scanner
+// Written by Nick Gammon
+// Date: 20th April 2011
+/*#undef PIN_WIRE_SDA
+#undef PIN_WIRE_SCL
+#define PIN_WIRE_SCL D1
+#define PIN_WIRE_SDA D2*/
+#include <Wire.h>
+
+void setup() {
+  Serial.begin (9600);
+
+  // Leonardo: wait for serial port to connect
+  while (!Serial) 
+    {
+    }
+
+  Serial.println ();
+//#undef SCL
+//#undef SDA
+  Serial.print("SCL=");Serial.println (SCL);
+  Serial.print("SDA=");Serial.println (SDA);
+  Serial.print("PWSCL=");Serial.println (PIN_WIRE_SCL);
+  Serial.print("PWSDA=");Serial.println (PIN_WIRE_SDA);
+  Serial.println ();
+  Serial.println ("I2C scanner. Scanning ...");
+  byte count = 0;
+  
+/*#define SCL 5
+#define SDA 4*/
+  Wire.begin();
+  for (byte i = 8; i < 120; i++)
+  {
+    Wire.beginTransmission (i);
+    if (Wire.endTransmission () == 0)
+      {
+      Serial.print ("Found address: ");
+      Serial.print (i, DEC);
+      Serial.print (" (0x");
+      Serial.print (i, HEX);
+      Serial.println (")");
+      count++;
+      delay (1);  // maybe unneeded?
+      } // end of good response
+  } // end of for loop
+  Serial.println ("Done.");
+  Serial.print ("Found ");
+  Serial.print (count, DEC);
+  Serial.println (" device(s).");
+}  // end of setup
+
+void loop() {}