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-rw-r--r--libraries/Wire/examples/digital_potentiometer/digital_potentiometer.ino39
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diff --git a/libraries/Wire/examples/digital_potentiometer/digital_potentiometer.ino b/libraries/Wire/examples/digital_potentiometer/digital_potentiometer.ino
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+// I2C Digital Potentiometer
+// by Nicholas Zambetti <http://www.zambetti.com>
+// and Shawn Bonkowski <http://people.interaction-ivrea.it/s.bonkowski/>
+
+// Demonstrates use of the Wire library
+// Controls AD5171 digital potentiometer via I2C/TWI
+
+// Created 31 March 2006
+
+// This example code is in the public domain.
+
+// This example code is in the public domain.
+
+
+#include <Wire.h>
+
+void setup()
+{
+ Wire.begin(); // join i2c bus (address optional for master)
+}
+
+byte val = 0;
+
+void loop()
+{
+ Wire.beginTransmission(44); // transmit to device #44 (0x2c)
+ // device address is specified in datasheet
+ Wire.write(byte(0x00)); // sends instruction byte
+ Wire.write(val); // sends potentiometer value byte
+ Wire.endTransmission(); // stop transmitting
+
+ val++; // increment value
+ if (val == 64) // if reached 64th position (max)
+ {
+ val = 0; // start over from lowest value
+ }
+ delay(500);
+}
+