Connect arduino to mpr083 (freescale touch sensor)

Forum 2005-2010 (read only) Hardware Interfacing
1

Good afternoon.
I'm doing a projects which consists in do a touch sensor.
So i decided use the freescale touch sensor MPR083.
However I have many problems in use the wire library.
What happens is that the arduino crashes when it goes execute de code: Wire.endTransmisson.

The code that I do is:

#include <Wire.h>

void setup()
{
Serial.begin(9600);
Wire.begin(); // join i2c bus (address optional for master)

}

void loop()
{
Serial.println("vai escrever");
Wire.beginTransmission(0b10011010); // transmit to device #4
Wire.send(0b00001010); // sends five bytes
Wire.send(0b00010101); // sends one byte
Wire.endTransmission(); // stop transmitting
delay(500);
Serial.println("escreveu");
}

Anyone can help me to do this project?
TKS

2

i have the same problem :S

3

Have you tried sending the numbers in hex?

Wire.send(0b00001010); // sends five bytes

Why would sending the number 10 send five bites?
and 21 for sending one byte?

What does the datasheet say?

4

yeah, I forgot delete the comments. It was copy paste of an example code.
The datasheet doesn't have nothing about the code.

5

How you can see here:

800×532 9.3 KB

it's 1001101 for adress and 0 or 1 to read or write.

Wire.beginTransmission(0b10011010);
6

Ok i understand that but isn't it what i put?
Look: Wire.beginTransmission(0b10011010) , the firsts seven bits are the adress and th last is the instruction to write. Am I correct?