As far as I am aware, soft float is not sufficient. However, there are $5
processors with hard float now. A radio not using the modules that Chris uses
in the prototype might have only one powerful ARM, more bits in the DAC/ADC
(the module has 8 bits each on I and Q), and a smaller gate array (because the
more complicated modems and codecs will probably not ever make it to a gate
array implementation).
"Stuart Longland (VK4MSL)" <m...@vk4msl.yi.org> wrote:
>On 17/04/13 15:15, Bruce Perens wrote:
>> Joel Stanley <j...@jms.id.au> wrote:
>>> What is stopping you from using the on-board processor?
>>
>> The module that Chris uses includes a low-end ARM processor with no
>> floating point and no memory management. It does run uClinux, it has
>> Ethernet, and it can demodulate GMSK, but it's not up to running
>> Codec2 or as powerful an application platform as I'd like.
>
>Would softfloat be good enough? If the clock speed is sufficient, the
>lack of floating-point hardware may not matter much. It obviously
>isn't
>ideal, but it'd work.
>
>That said, having a small floating-point "DSP" might be a good way to
>go
>too, let the on-board ARM CPu do all the user interface stuff and
>offload the serious RF work to another processor.
>
>> We have two hardware platforms that I think we can display. One is
>> "HT of the Future" and is as smart as a smartphone and makes all
>> commercial HTs look primitive. The other is a Raspberry Pi + an SDR.
>> It would make commercial HTs look primitive if it had a touchscreen.
>
>I suppose a device here would be more like a chunky 8" tablet: with a
>decent battery in the back and a fairly large touchscreen -- which
>could
>be a plus for usability.
>--
>Stuart Longland (aka Redhatter, VK4MSL)
>
>I haven't lost my mind...
> ...it's backed up on a tape somewhere.
>
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