Arduino for STM32

for synthesizer codes I'd guess it'd take quite a lot of c/c++ codes etc to synthesize https://www.google.com/search?q=software+synthesizer+c%2B%2B if you're keen on midi there are things like gus patches the soundfonts files can easily be like > 100 megs https://www.google.com/search?q=midi+syn+gus...

Unfortunately, F411 do not have DACs. https://www.st.com/en/microcontrollers-microprocessors/stm32f411ce.html Hence, for this chip PWM is about the only way to do some DAC. stm32g431, stm32f407, stm32f405 etc has DAC, check the specs https://www.st.com/en/microcontrollers-microprocessors/stm32g4x1.h...

if you are using stm32f103c8 blue pill you need to choose generic_boot20_pc13.bin https://github.com/rogerclarkmelbourne/STM32duino-bootloader/blob/master/binaries/generic_boot20_pc13.bin and flash that using st-link (or uart) if you are in windows use stm32cube programmer to flash that boot loader ...

for stm32f103 you need either a st-link v2 https://www.adafruit.com/product/2548 https://www.st.com/en/development-tools/st-link-v2.html https://octopart.com/search?q=st-link+v2 or a usb-uart (3.3v) dongle for a usb-uart you need to set boot0 to program it alternatively, get a stm32f401/f411 (e.g. 4...

for this maple DFU boot loader, after you press reset, it should blink fast for like 6 times, you need to click upload or run dfu-util within about 4-5 seconds when it blinks there is a 'perpetual' mode, and I think the setting is 'boot1' jumper this is from the good old days http://static.leaflabs....

I think there is one more trouble, I think neopixels are driven at 5 V https://cdn-shop.adafruit.com/datasheets/WS2812B.pdf it may take a 74LVC1G17 to interface it https://www.nexperia.com/products/analog-logic-ics/logic/buffers-inverters-transceivers/schmitt-trigger-ics/series/74LVC1G17.html https:...

one should read datasheets e.g. https://www.st.com/resource/en/datasheet/stm32f103c8.pdf 5.2 Absolute maximum ratings Output current sunk by any I/O and control pin 25 mA Output current source by any I/Os and control pin − 25 mA in fact it should be much less than this like 5 mA max, at 20 mA you ri...

custom bootloaders are 3rd party developed back in the 'old days' there is leaflabs maple, that is the first popular *duino running on stm32f103, the old forum which hosted this made improvements originally hosted by 'roger' https://github.com/rogerclarkmelbourne/Arduino_STM32 https://github.com/rog...

if you want to program a stm32f103 e.g. those 'blue pill' style boards. get a st-link v2 https://www.adafruit.com/product/2548 https://www.st.com/en/development-tools/st-link-v2.html https://octopart.com/search?q=st-link+v2 for 'blue pill' style boards, i think they put the headers for that at the '...