root / arduino-1.0 / libraries / Wire / examples / digital_potentiometer / digital_potentiometer.ino @ 58d82c77
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// I2C Digital Potentiometer |
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// by Nicholas Zambetti <http://www.zambetti.com> |
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// and Shawn Bonkowski <http://people.interaction-ivrea.it/s.bonkowski/> |
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// Demonstrates use of the Wire library |
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// Controls AD5171 digital potentiometer via I2C/TWI |
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// Created 31 March 2006 |
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// This example code is in the public domain. |
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// This example code is in the public domain. |
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#include <Wire.h> |
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void setup() |
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{ |
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Wire.begin(); // join i2c bus (address optional for master) |
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} |
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byte val = 0; |
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void loop() |
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{ |
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Wire.beginTransmission(44); // transmit to device #44 (0x2c) |
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// device address is specified in datasheet |
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Wire.write(byte(0x00)); // sends instruction byte |
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Wire.write(val); // sends potentiometer value byte |
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Wire.endTransmission(); // stop transmitting |
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val++; // increment value |
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if(val == 64) // if reached 64th position (max) |
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{ |
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val = 0; // start over from lowest value |
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} |
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delay(500); |
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} |
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