how to use accelerometer using atmega16?

I want to use accelerometer using my atmega16, but I have no idea about it. I only know that I have to use the ADC ports... help please

Comments

[gmoon]

Don't want to steal Steve's thunder, but I made a wireless accelerometer joystick. The transmitter uses an ADXL330 and an ATmega8, among the components. The ADXL330 is analog output also, and the ADC code would be virtually identical for an ATmega16.

Here's link to the details page; there you'll find a source zip.

It's been 5 or 6 years, so my AVR ADC coding skill are a little rusty, but between the source and the datasheet you should be on your way...

[SaurIMX]

thanks

[steveastrouk]

What programming environment are you using ?
Have you read the data sheet ? These things are very, very easy to use.

Steve

[SaurIMX]

AVR studio 4, i read it but i didn't get it...

[steveastrouk]

Can you program ?

[SaurIMX]

yeah, but i cant program with ADC ports. will you just simply explain me the concept? then I will manage to complete the whole program.

[steveastrouk]

Do you want to do this yourself, or use one of the libraries ?

[SaurIMX]

myself

[steveastrouk]

Start with another datasheet !

http://www.atmel.com/Images/doc2466.pdf

P204

Here you'll find the control registers for the ADC described, the multiple operating modes, and how to start them.

You are programming "on the metal", so you have to know at the very lowest level how the processor works.

Steve

[SaurIMX]

actually I already have the datasheet of atmega16, by the way, thanks...

[steveastrouk]

OK then,
Lets walk through the steps you need.

1.) Config: Decide on sampling rate and type

2.) Using Interrupts ?

3.) Reading data out: how to avoid atomicity issues.

[SaurIMX]

I didn't get it. I never used accelerometer and any application of ADC pin.

[steveastrouk]

Forget the accelerometer bit - all you're doing is reading three voltages.
Gmoon's code's a good place to start.

[SaurIMX]

yeah, thanks. i got 50% idea. another 50% i'll get after using it... actually I am trying to make an robotic arm using accelerometer and servos... :) cheers...

[steveastrouk]

WHICH accelerometer ? Most actually have digital outputs.

[SaurIMX]

3 axis, which has x, y and z terminals

[steveastrouk]

Device NAME and NUMBER

[SaurIMX]

ADXL335