RoboSavvy Forum

Chaining I2C devices

2007-10-10T19:57:30+01:00

Ignore my earlier post, I missed the point.

I like the sound of your wireless idea Bren

For £15 I will definitely buy one to play with. (may be put a plug on the side of my PS1 controller for an alternative control method)

alonsoBrain -I may be mad but i would consider replacing the microcontroller in one (master) nunchuck and read the analogue signals from the accelerometers directly. You could then also optionally fit a bluetooth or zigbee transmitter inside the master nunchuck, while reading the second slave (unmodified) nunchuck via i2c. Possibly not the cheapest or best option for you

Chris

Statistics: Posted by NovaOne — Wed Oct 10, 2007 7:57 pm

Chaining I2C devices

2007-10-09T11:55:01+01:00

Hi me again.

Just finished reading the link. Very interesting I have a couple of Arduino so might give it a try. might even see if I can make it wireless. I would still use two Arduino mini's have them mounted on bot then you could use them to pre-process the data and as analogy inputs.

Bren

Statistics: Posted by Robo1 — Tue Oct 09, 2007 11:55 am

Chaining I2C devices

2007-10-09T11:46:50+01:00

I would say quicker and easier to use to microcontrollers and then use and use the spare ports of r other things.

Would love to see that you going to use it for have you got the remote working to.

Bren

Statistics: Posted by Robo1 — Tue Oct 09, 2007 11:46 am

Chaining I2C devices

2007-10-08T20:09:31+01:00

Have you got i2c comms with a single nunchuk working yet?

I'm sure you know that the nunchuk has a default slave address of 0x52 and looking at the PCB http://wiire.org/Wii/nunchuk U1 is a custom controller, so i may be impossible to alter this address?

If you bit banging on general purpose i/o lines(?) and have two spare lines why not bit bang the second nunchuk separately.

Good luck

Statistics: Posted by NovaOne — Mon Oct 08, 2007 8:09 pm

Chaining I2C devices

2007-10-08T09:07:04+01:00

i-Bot wrote:
What devices were you think of using ?

I'm using a Nintendo Nunchuck Wii device.
I've implemented this
http://www.windmeadow.com/node/42
and now I like to modify it to read 2 Nunchuck devices...

Is it posible?
Or must I use another microcontroller to read the data ?

Statistics: Posted by alonsoBrain — Mon Oct 08, 2007 9:07 am

Chaining I2C devices

2007-10-05T16:16:49+01:00

Most I2C devices allow the ID to be changed. This is by hardware (links) or in the eeprom if it is a programmed device.

What devices were you think of using ?

Statistics: Posted by i-Bot — Fri Oct 05, 2007 4:16 pm

Chaining I2C devices

2007-10-05T15:29:00+01:00

Most I2C devices have a way of choosing between one of several ID's, typically by pulling up or down several pins on the device.

You can't use 2 devices on the same bus with the same ID...

- Jon

Statistics: Posted by JonHylands — Fri Oct 05, 2007 3:29 pm

Chaining I2C devices

2007-10-05T15:03:55+01:00

Hi!

Is it posible to build a bus of I2C devices with the same ID?
How can I read 2 devices of the same type????

Statistics: Posted by alonsoBrain — Fri Oct 05, 2007 3:03 pm