diff options
Diffstat (limited to 'libraries/Wire/examples')
6 files changed, 259 insertions, 0 deletions
diff --git a/libraries/Wire/examples/SFRRanger_reader/SFRRanger_reader.pde b/libraries/Wire/examples/SFRRanger_reader/SFRRanger_reader.pde new file mode 100644 index 0000000..c8fb3c9 --- /dev/null +++ b/libraries/Wire/examples/SFRRanger_reader/SFRRanger_reader.pde @@ -0,0 +1,87 @@ +// I2C SRF10 or SRF08 Devantech Ultrasonic Ranger Finder
+// by Nicholas Zambetti <http://www.zambetti.com>
+// and James Tichenor <http://www.jamestichenor.net>
+
+// Demonstrates use of the Wire library reading data from the
+// Devantech Utrasonic Rangers SFR08 and SFR10
+
+// Created 29 April 2006
+
+// This example code is in the public domain.
+
+
+#include <Wire.h>
+
+void setup()
+{
+ Wire.begin(); // join i2c bus (address optional for master)
+ Serial.begin(9600); // start serial communication at 9600bps
+}
+
+int reading = 0;
+
+void loop()
+{
+ // step 1: instruct sensor to read echoes
+ Wire.beginTransmission(112); // transmit to device #112 (0x70)
+ // the address specified in the datasheet is 224 (0xE0)
+ // but i2c adressing uses the high 7 bits so it's 112
+ Wire.send(0x00); // sets register pointer to the command register (0x00)
+ Wire.send(0x50); // command sensor to measure in "inches" (0x50)
+ // use 0x51 for centimeters
+ // use 0x52 for ping microseconds
+ Wire.endTransmission(); // stop transmitting
+
+ // step 2: wait for readings to happen
+ delay(70); // datasheet suggests at least 65 milliseconds
+
+ // step 3: instruct sensor to return a particular echo reading
+ Wire.beginTransmission(112); // transmit to device #112
+ Wire.send(0x02); // sets register pointer to echo #1 register (0x02)
+ Wire.endTransmission(); // stop transmitting
+
+ // step 4: request reading from sensor
+ Wire.requestFrom(112, 2); // request 2 bytes from slave device #112
+
+ // step 5: receive reading from sensor
+ if(2 <= Wire.available()) // if two bytes were received
+ {
+ reading = Wire.receive(); // receive high byte (overwrites previous reading)
+ reading = reading << 8; // shift high byte to be high 8 bits
+ reading |= Wire.receive(); // receive low byte as lower 8 bits
+ Serial.println(reading); // print the reading
+ }
+
+ delay(250); // wait a bit since people have to read the output :)
+}
+
+
+/*
+
+// The following code changes the address of a Devantech Ultrasonic Range Finder (SRF10 or SRF08)
+// usage: changeAddress(0x70, 0xE6);
+
+void changeAddress(byte oldAddress, byte newAddress)
+{
+ Wire.beginTransmission(oldAddress);
+ Wire.send(0x00);
+ Wire.send(0xA0);
+ Wire.endTransmission();
+
+ Wire.beginTransmission(oldAddress);
+ Wire.send(0x00);
+ Wire.send(0xAA);
+ Wire.endTransmission();
+
+ Wire.beginTransmission(oldAddress);
+ Wire.send(0x00);
+ Wire.send(0xA5);
+ Wire.endTransmission();
+
+ Wire.beginTransmission(oldAddress);
+ Wire.send(0x00);
+ Wire.send(newAddress);
+ Wire.endTransmission();
+}
+
+*/
diff --git a/libraries/Wire/examples/digital_potentiometer/digital_potentiometer.pde b/libraries/Wire/examples/digital_potentiometer/digital_potentiometer.pde new file mode 100644 index 0000000..8b29b68 --- /dev/null +++ b/libraries/Wire/examples/digital_potentiometer/digital_potentiometer.pde @@ -0,0 +1,39 @@ +// 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.send(0x00); // sends instruction byte
+ Wire.send(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);
+}
+
diff --git a/libraries/Wire/examples/master_reader/master_reader.pde b/libraries/Wire/examples/master_reader/master_reader.pde new file mode 100644 index 0000000..e8805d0 --- /dev/null +++ b/libraries/Wire/examples/master_reader/master_reader.pde @@ -0,0 +1,32 @@ +// Wire Master Reader
+// by Nicholas Zambetti <http://www.zambetti.com>
+
+// Demonstrates use of the Wire library
+// Reads data from an I2C/TWI slave device
+// Refer to the "Wire Slave Sender" example for use with this
+
+// Created 29 March 2006
+
+// This example code is in the public domain.
+
+
+#include <Wire.h>
+
+void setup()
+{
+ Wire.begin(); // join i2c bus (address optional for master)
+ Serial.begin(9600); // start serial for output
+}
+
+void loop()
+{
+ Wire.requestFrom(2, 6); // request 6 bytes from slave device #2
+
+ while(Wire.available()) // slave may send less than requested
+ {
+ char c = Wire.receive(); // receive a byte as character
+ Serial.print(c); // print the character
+ }
+
+ delay(500);
+}
diff --git a/libraries/Wire/examples/master_writer/master_writer.pde b/libraries/Wire/examples/master_writer/master_writer.pde new file mode 100644 index 0000000..e85e2d8 --- /dev/null +++ b/libraries/Wire/examples/master_writer/master_writer.pde @@ -0,0 +1,31 @@ +// Wire Master Writer
+// by Nicholas Zambetti <http://www.zambetti.com>
+
+// Demonstrates use of the Wire library
+// Writes data to an I2C/TWI slave device
+// Refer to the "Wire Slave Receiver" example for use with this
+
+// Created 29 March 2006
+
+// This example code is in the public domain.
+
+
+#include <Wire.h>
+
+void setup()
+{
+ Wire.begin(); // join i2c bus (address optional for master)
+}
+
+byte x = 0;
+
+void loop()
+{
+ Wire.beginTransmission(4); // transmit to device #4
+ Wire.send("x is "); // sends five bytes
+ Wire.send(x); // sends one byte
+ Wire.endTransmission(); // stop transmitting
+
+ x++;
+ delay(500);
+}
diff --git a/libraries/Wire/examples/slave_receiver/slave_receiver.pde b/libraries/Wire/examples/slave_receiver/slave_receiver.pde new file mode 100644 index 0000000..500f036 --- /dev/null +++ b/libraries/Wire/examples/slave_receiver/slave_receiver.pde @@ -0,0 +1,38 @@ +// Wire Slave Receiver
+// by Nicholas Zambetti <http://www.zambetti.com>
+
+// Demonstrates use of the Wire library
+// Receives data as an I2C/TWI slave device
+// Refer to the "Wire Master Writer" example for use with this
+
+// Created 29 March 2006
+
+// This example code is in the public domain.
+
+
+#include <Wire.h>
+
+void setup()
+{
+ Wire.begin(4); // join i2c bus with address #4
+ Wire.onReceive(receiveEvent); // register event
+ Serial.begin(9600); // start serial for output
+}
+
+void loop()
+{
+ delay(100);
+}
+
+// function that executes whenever data is received from master
+// this function is registered as an event, see setup()
+void receiveEvent(int howMany)
+{
+ while(1 < Wire.available()) // loop through all but the last
+ {
+ char c = Wire.receive(); // receive byte as a character
+ Serial.print(c); // print the character
+ }
+ int x = Wire.receive(); // receive byte as an integer
+ Serial.println(x); // print the integer
+}
diff --git a/libraries/Wire/examples/slave_sender/slave_sender.pde b/libraries/Wire/examples/slave_sender/slave_sender.pde new file mode 100644 index 0000000..e80acd6 --- /dev/null +++ b/libraries/Wire/examples/slave_sender/slave_sender.pde @@ -0,0 +1,32 @@ +// Wire Slave Sender
+// by Nicholas Zambetti <http://www.zambetti.com>
+
+// Demonstrates use of the Wire library
+// Sends data as an I2C/TWI slave device
+// Refer to the "Wire Master Reader" example for use with this
+
+// Created 29 March 2006
+
+// This example code is in the public domain.
+
+
+#include <Wire.h>
+
+void setup()
+{
+ Wire.begin(2); // join i2c bus with address #2
+ Wire.onRequest(requestEvent); // register event
+}
+
+void loop()
+{
+ delay(100);
+}
+
+// function that executes whenever data is requested by master
+// this function is registered as an event, see setup()
+void requestEvent()
+{
+ Wire.send("hello "); // respond with message of 6 bytes
+ // as expected by master
+}
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