The reasoning is indeed that floating point is easier to develop and
that our development time is more expensive than CPUs.We don't know the
table sizes offhand.
However, the assumption that both of the codec and modem would fit in
really small and relatively low-power floating point chips was
optimistic and as of this moment it's right on the edge of working in
the STM32F405 that David has built into his SmartMic project. The
STM32F405 is an ARM Cortex M4F at 168 MHz, 1 MB FLASH, 126K
instruction/data RAM, and 64K data RAM.
Over the past weeks David has torn through the code working on
optimization, and at this moment the receive speed is "borderline".
Thanks
Bruce
CPOn 08/20/2014 11:42 AM, Steve wrote:
I think the reasoning is, that floating point and memory are so cheap
now, that trying to fit a design into a restricted space would just
lengthen the time to profit.
Why design to a fixed point $30 DSP when you can buy a $5 CPU with
hardware FP.
73,Steve
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