AVR-Chat

Paul ,

Certainly a faster chip will help you but not if your code is poorly 
written from a performance point of view. Before jumping ship, have you 
tried to isolate the problem more into what part of the code is slow? 
You indicated that you do a lot of floating point exponential 
calculations. Have you looked at streamlining this area of code? There 
are several methods including approximations and reductions. The best 
approach is probanly a table-driven approach (unless your FP library is 
already doing this). Here are some links:

http://www.acm.org/pubs/citations/journals/toms/1990-16-3/p185-tang/ - needs ACM access to download PDF

http://www.ece.concordia.ca/~tahar/pub/FPE_TR98.ps&e=747 - table driven algorithm in hardware example

http://www.intel.com/technology/itj/q41999/articles/art_5.htm - 
interesting background article on what Intel did

Regards,
Mike

> All,
>
>   I'm currently using a MEGA16 at 16Mhz for a project, and I'm doing a lot
> of floating point calculations (most exponential) and its getting a bit
> slow, so I need something with a bit more 'umph'.
> I know its kinda off topic, but, what I'm after (I think) is something 
> 16Bit
> and a minimum of 25MIPs (32 would be preffered). it also *must* have an
> affordable C compiler (ie <£400) and an evaluation board. Surface mount is
> fine (in fact preffered).
>    I figured you guys would be the best place to start asking as 
> you've got
> the experience (probably), Anyone have any suggestions?
>
> Paul
>
>