MicroPython Forum (Archive)

including Pin, SPI, I2C, Timer, SD(read-only), GPU.

impressive. just out of curiosity, how kong does it take to boot to REPL?

you also might some information here
https://forums.adafruit.com/viewtopic.p ... 93#p487891

in general i believe this circuit is not 100% bullet proof as I have explaned in the thread above. yet it seems to be doing the job for most people...

absolutely exited about it. You have my money too

That thing is so tiny and yet so powerful, really looking forward to it.

Best wishes for the production rampup!

really looking forward to this too...

Some more teaser informations before volume productions would be nice... at least the MCU type that he is going to use?

One thing to try out is to NACK the USB packet if the rx buffer is full (or earlier, so that the received packet can still be fully stored in the ringbuffer). NACKing the USB packet solves flow control issues on the USB PHY level, without needing to configure flow control on the appliacation layer. ...

So, does USB_VCP rely on (utilize) one of the UARTs for its communications No it doesn‘t. Most stm32 cpus have a built in USB controller. That makes them capable of directly handle the VCP protocol (in contrast to cpus with dont have this - they need a separate usb-serial driver chip which would th...

if the receive circular buffer is full the pyboard will discard the rest of the data (and any following data frames as long as the data isnt processed by the pyboard). So no - there is no rts/cts type of flow control. regardind jupyter integration - fyi: I‘ve an example here https://github.com/hoihu...

that said - this works best on bare metal ports.

the esp rtos might place a sw layer/delay in between the timer‘s hw irq time and the actual python callback invocation

if there is no hw wdt available you could use one of the hw timer with an irq callback setup to trigger e.g. every 1sec. in the callback you could increase a global counter variable and do a machine.reset() if the counter exceeds a predefined value. in one of your foreground coros you can zero this ...

SKIPSD - that is a nice piece of information, thanks!