hi all,
i'm a newbie, novice to sigrok, just hope to get some pointers.
there are many stm32 based development boards (e.g. the discovery and
nucleo series from ST itself), and there are many others which can be
purchased on ebay etc for a rather low cost. e.g. if one search for
stm32f103 on ebay one could come across boards like blue pill or maple
mini that goes as low as $2. these devices based on arm cortex-m3 runs
at 72mhz has 2 adc which could push an envelop of about 2msps sampling
speeds and gpios in the 10s of mhz. then the higher end devices e.g. m4
stm32f407 runs at 168mhz has adcs that run up to 7msps and gpio sampling
speeds faster than the m3 series and the larger ve-zg devices has decent
amount of ram e.g. 64k-192k sram. and stm32 f3 series has adc that can
push 18msps quad interleaved. hence despite a only an on chip-full
speed usb 2.0, they can work as oscilloscopes or logic analyzers by
storing the adc samples to ram and later transmit that over usb. it
won't be those 100msps speeds but may be still useful for the lower mhz
analysis
if i want to turn these boards to interface with sigrok / pulseview etc.
where do i start looking for info?
are there any 'standard' sigrok protocols for oscilloscopes and logic
analyzers where i can just build the firmware on the stm32 soc so that
they'd 'just work' without changes at sigrok end?
thanks in advance.
andrew
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