AVR-Chat

--- In AVR-Chat@yahoogroups.com, "Donald H" <donhamilton2002@...> wrote:
>
> 
> 
> --- In AVR-Chat@yahoogroups.com, "syberraith" <syberraith@> wrote:
> >
> > I am designing a guitar pedal effect and need a MCU to sample the signal, perform a non-linear function, then generate a control current.
> > 
> > The project requires one ADC and one DAC these can be separate devices.  
> > 
> > The non-linear function can be performed without a FPU using CORDIC routines.  These would take a significant number instruction cycles to perform.  
> > 
> > The function could also be performed with a look up table, which would require significant memory.
> > 
> > I would like to have a sample rate as high as possible, 200K samples per second would be the highest desired, with 46K being the absolute lowest required.  
> > 
> > I have been looking at 16 bit devices in the 30 MIPS range and up.  Most of the ones I have seen with sufficient speed have been excessive elaborate.
> > 
> > So, does anybody know on a simple device with enough speed for my project?
> > 
> > Regards,
> > 
> > Fred
> >
> 
> 
> Fred,
> 
> Look at what others have done, this will give you insight as to the problems others have fought.
> 
> http://www.circuitcellar.com/microchip2007/winners/DE/MT1518.html
> 
> What do you mean by "excessive elaborate" ?
> 
> You will need MIPs do preform any kind of algorithm.
> 
> Will any AVR do 30MIPS ??
> 
> don
>

It looks like the ATxmega series will do 32MIPs.

I will be looking over the app notes to see what algorithms are possible.

don