Arduino for STM32

i've occasionally used imgur https://imgur.com/ but i'm not sure how long the images would be retained there. so those images may 'disappear' after a while. slighly larger sizes say < 200k would probably help, my guess is compression can mostly fit many in but there would still be many that exceed t...

one way though is to explore dma https://www.st.com/content/ccc/resource/technical/document/application_note/group0/91/01/84/3f/7c/67/41/3f/DM00236305/files/DM00236305.pdf/jcr:content/translations/en.DM00236305.pdf chapter 5 Arbitrary waveform generation using timer DMA-burst feature and this is pro...

well, it means your timer is generating the interrupts as you expect, so if you expect your timer to say run at 100khz that would be 100k interrupts per sec + 1000 interrupts from systick. so say if you increase the loop count to say 101000 / 2 and split the intervals between led on - led off it wou...

my guess is one could check if other interrupts (e.g. usb sof every 1ms and systick every 1ms used for delay(n) ) could be occuring. one of those tricks i do is place asm("wfi"); in loop(), that is nearly the same as delay(1) and have an variable, counter checking the number of "wfi&q...

not too familiar with avr's too but DDRx registers basically gives the direction of a pin being input or output? http://maxembedded.com/2011/06/port-operations-in-avr/ i'd guess the arduino api pinMode(pin,mode) gives similar functionality, e.g. pinMode(pin, INPUT) and pinMode(pin, OUTPUT) , probabl...

it is interesting that the 'ancient' uart is still relevant today, simply because for one thing, framing and parity checks is there. and it literally makes that comms channel clean as noise (just press reset on target, without framing checks, it generates 'extra' bytes) and corrupted bytes are simpl...

for flashing another stm32(f103) via uart ST states in AN3155 that the boot loading requires even parity //AN3155: usart boot loader requires even parity // but literally those parity stuff is not (yet) implemented in the core // and somehow it works! ;) //Serial1.begin(115200,SERIAL_8E1); one of th...

hi all, i've released an 'example' sketch for usb-uart bridging with signals https://github.com/rogerclarkmelbourne/Arduino_STM32/tree/master/STM32F1/libraries/A_STM32_Examples/examples/Communication/USB-uart-w-signals digging through the (libmaple) codes, i found that it is pretty much possible to ...

another thing i liked about stm32 family of mcus at least from m3 up is they are native generic usb devices though other mcu families e.g. nxp, freescale, ti etc have pretty much the same things the other thing is the well written verbose reference manuals. there are a lot of arm derivatives not fro...

for this board one of the design elements i liked is the designer/vendor made boot0 a push button. while apps can't use it, but when flashing firmware, one can simply press that button, reset and flash away. resetting it next reverts to the normal mode. and as it is a f411 chances are that it is DFU...