Wii Nunchuck and Interrupts

Other Hardware Sensors
1

I'm new to programming with microcontrollers.

I am trying to have LEDs become interactive based on how the Wii Nunchuck is used.

For example, I would want to control the LEDs in a matrix with the accelerometer or display a pattern with the C and Z buttons on the Wii Nunchuck.

I was wondering if it would be possible to use interrupts to constantly check the status of the Nunchuck if the Nunchuck is connected to the analog pins A4 and A5?

Thanks.

2

I was wondering if it would be possible to use interrupts to constantly check the status of the Nunchuck if the Nunchuck is connected to the analog pins A4 and A5?

I don't know about using interrupts, but as the Nunchuck uses I2C protocol, you
can just use a standard I2C routine. I used the following sketch and it worked great
the first time.

http://www.windmeadow.com/node/42

Be sure to use ONLY 3.3V to power and interface to the Nunchuck - unfortunately
a little difficult to do if you have a 5V Arduino. I cut the funny connector off the
Nunchuck and just wired it in.

3

Would there be a way to be able to constantly read the data from the nunchuck in the background while the main program is going on?

I wonder because my main program requires to know the status of both the buttons and accelerometer of the nunchuck.

I do not want to use a polling method because the button presses would not be read on occasion.

Interrupts seem to be the best route, but from what I know, interrupts don't seem to work with I2C. Is there a way to implement the interrupt for the nunchuck?

I read the information in the previous post, but the previous post only shows how to read data without a main program going on simultaneously.