Richard , suggest RT family from NXP
While I am a devout STM32 harwdare man, and I pray with JTAG adaptor on
my head 16 times per day toward Eindhoven,
price difference for a ham project is significant....
the RT processors are terrific.
RT1020 is a 500 MHz M7 is an LQFP package. needs external $1 (ideally
quad) SPI flash. has 256kbytes of TCM (pretty much cacheless memory
operation) .
and $5 ... that's my suggestion.
RT1050, 1060 are BGA , 512kbytes (half TCM) and 600 meg and sram. $6
https://www.nxp.com/products/processors-and-microcontrollers/arm-based-processors-and-mcus/i.mx-applications-processors/i.mx-rt-series:IMX-RT-SERIES
STM32H7 with 2MB SRAM is $19
On 5/02/2019 7:25 AM, Richard wrote:
Hi All,
Understood about the future modes, I was hoping to support 700D (when
released) so perhaps switching processor is desirable. My skillset is
90%/10% hardware/software so both a complete rewrite and porting to a
totally different platform are out for me. I might take a look at
other ST options, several of you have mentioned the F7 and a quick
look seems promising. Does anyone with more experience have a specific
part number to recommend?
Low cost, whilst nice, isn't really a goal for me, but physical size
and power consumption are.
Thanks
Richard
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On Mon, 4 Feb 2019 at 20:02, glen english <[email protected]
<mailto:[email protected]>> wrote:
Hi Don
I got codec2 working on F7 a few years ago, and I was getting 2x the
performance than the guys were getting on the F4. for the same clock
speed...- 2 reasons- 1) the F4 code is completely unoptimized and
really
hurts the F4, and 2) the F7 is quite a bit faster if the cache
access is
optimal..
IMO the attempt to keep the code base portable between PC and
microcontroller is problematic and a limit.
suggest The ORANGE PI zero is a tiny inch square PCB and has onboard
audio..... It's what I use.... quad core A7 etc and NEON.
H7 is th new kid ont he block , but STM32 is expensive !!!
Suggest Rt1050 series from NXP for low cost (couple of bucks) and 400
meg F7 perfromance
-glen
On 5/02/2019 5:24 AM, Don wrote:
> I am currently working on getting the 700D mode to work with the
SM1000.
> It is not certain that this will be possible because of the memory
> needed.
>
> Also Dave is looking at new compression modes with different
performance
> and bandwidths.
>
> I see the current firmware as best suited for experimenting and
developing
> on a desktop PC. To make a small, low cost embedded version one
would
> likely want to do a major re-write of the code. Lack
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