AVR-Chat

On Fri, 20 Jan 2006, eccamacho wrote:

> 
> Pardon me if this has been discussed before.  I searched through a few
> messages and found some things which are similar, but not quite the same.
> 
> I'll be programming on a Atmega128 which will be connected over serial
> to another microcontroller to do higher level processing.  The Atmega
> will be connected to 2 quadrature optical encoders.  Each encoder will
> be connected to a shaft which will do about 7 revolutions/sec.  The
> encoders have 256 CPS (is that clocks per second or cycles per second?). 
> 

I see no reason why that wouldn't work.  You should be able to store your 
data in the on-chip RAM or the EEPROM with plenty of room to spare. No 
need to try to store it in a timer register. The mega128 has a lot of 
capacity.

I'm working on implementing a digital compass chip made by a company 
called PNI. It has six data/control leads.  I've never done floating-point 
math in a micro before, and I'm trying to implement something called the 
Pade approximation of arctangent in the AVR to compute compass direction 
from the output X and Y data.  It's a learning experience! 

Zack