[sdiy] In praise of the ATM STM32F303

[sleepy_dog at gmx.de]

yeah those things are nice, didn't use the F3xx series so far but the 
F4xx series, both have an M4 core.
This means:
Mostly single cycle FPU instructions and single cycle conversion between 
float and int, stuff like MAC for integer.
So whoever unfamiliar with these MCUs read that and thought "kinda 
pentium 1 with 70 MHz" kind of power, I think that would be off, as the 
P1 had a lot more to chew on those instructions :-)
The F4 series can run at 168 MHz (or some can 180 MHz I think)

There is quite cheap (~ 20..30 EUR) "discovery" boards as they call it 
with the STM32F4xx (and also F3xx), the one has a 16bit stereo DAC with 
audio amp (STM32F407 discovery), another has 8MB SDRAM + 320x240 TFT 
display (STM32F429 discovery, seems unavailable right now)
which some people on YT have done DSPy stuff with.
Like here:
https://www.youtube.com/watch?v=yDBXfkS3y7w

ST also has cheap "nucleo" boards with these (the nucleo are more bare 
bones usually IIRC)

At RS-online (german branch), the "Nucleo Board for STM32F303 Series" 
costs 10,14 EUR + tax.

The discovery and nucleo boards have an ST-Link V2 debugger on board - 
i.e. plug in USB port, install some lite version of an IDE, and you can 
program and debug (single step instructions, see variable values etc) 
for nothing more than those few bucks.

- Steve


Am 12.02.2016 um 07:43 schrieb Loscha:
> Markus Fuller just uploaded another of his great series of teardown 
> videos.
>
> Today's victim was the Waldorf Streichfett
> https://www.youtube.com/watch?v=umXnCuVBwf0
>
> The entire synthesizer string machine is a single ARM STM32F303 chip.
> There is a power supply chip, an op amp for the audio outs, crystal, 
> but the only computational device is the ARM
>
> http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1576/LN1531
>
> Notable for Audio considerations is that the DACs are 12 bit. Given 
> the amount of beloved instruments that use 12 bit DACs, and the 
> quality of this machine, it hardly seems a limitation.
>
> /Edward
>
>
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