Codec2 will work on the stm32f4. I have ported it prior to major fvmodem 
changes using a stm protoboard codec and ram.

Sent from my iPhone

On Apr 17, 2013, at 8:30 PM, Kristoff Bonne <krist...@skypro.be> wrote:

> HI Matthew,
> 
> 
> I may be wrong but according the AVR documentation, the AT91SAM9XE is based 
> on the ARM926EJ-S, which is a ATM9 with DSP instruction set ... but without 
> FPU (or VPU in ARM-speak)?
> 
> 
> 73
> Kristoff - ON1ARF
> 
> On 18-04-13 01:59, Matthew Pitts wrote:
>> I know of several projects that are using the Atmel AT91SAM9XE that will be 
>> integrating Codec2 into the firmware of their boards; these projects will 
>> also be running AMBE chips as well, but the concept behind at least one of 
>> the them is to be integrated into a cheap FM HT and either replace or 
>> supplement the stock MCU to add digital voice capabilities to the radio.
>> 
>> Clearly: building a spechial Coec2 decoder is some big business - propably 
>> only achievable for big bu$ine$$...
>> But an ARM microcontroller (Ti Stellaris series) will be fine, too. It can 
>> run the reference implementation of codec2 without architectural 
>> optimization, as it has a SP-floatpoint unit, too...
>> For $ 12,99 , it's worth a try...
>> As most tools are architecture-independent, you can use your Raspberry Pi 
>> for programming it... xD
>> 
>> 
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