Reference for Wiring version 0027+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.
Name |
Wire |
Examples |
#include "Wire.h"
void setup()
{
// join i2c bus (address optional for master)
Wire.begin();
// start serial for output
Serial.begin(9600);
}
void loop()
{
// request 6 bytes from slave device #2
Wire.requestFrom(2, 6);
// slave may send less than requested
while(Wire.available())
{
// receive a byte as character
char c = Wire.receive();
Serial.print(c); // print the character
}
delay(500);
}
#include "Wire.h"
void setup()
{
// join i2c bus with address #4
Wire.begin(4);
// register event
Wire.onReceive(receiveEvent);
// start serial for output
Serial.begin(9600);
}
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)
{
// loop through all but the last
while(1 < Wire.available())
{
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
} |
Description |
There is a TWI (Two Wire Interface) port available on the Wiring board named Wire. The port Wire is available on the Wiring harware pins 0(SCL) and 1(SDA). |
Syntax |
Wire |
Methods |
|
Parameters |
Wire |
The hardware TWI port |
|
Returns |
None |
Usage |
Application |
Updated on September 18, 2010 03:23:31pm PDT