Arduino for STM32

The boards menu is improved with Arduino 1.8.13. Arduino and STM32 boards each have their own menu.

Sadly i cannot find any reasonable page about that now

A partial copy of the old forum is at https://stm32duinoforum.com.

The first thing to do is to connect the hardware one piece at a time and then run a I2C scanner program to make sure that your I2C devices are detected at the right address. In Ardiuino, select File->Examples->Wire->i2c_scanner. DS3231 modules typically have two addresses, one for the clock and anot...

Before setup include these lines: #define pin PA6 TIM_TypeDef *Instance = (TIM_TypeDef *)pinmap_peripheral(digitalPinToPinName(pin), PinMap_PWM); uint32_t channel = STM_PIN_CHANNEL(pinmap_function(digitalPinToPinName(pin), PinMap_PWM)); HardwareTimer *MyTim = new HardwareTimer(Instance); Inside setu...

another option is literally is to improve my algorithm for the time drift offsetting Your method looks like a variation of Bresenham's algorithm where the error is applied to the value after some time. This was popular when PIC microcontrollers were all we had to play with. See https://www.romanbla...

For rotary encoder see this thread: https://www.stm32duino.com/viewtopic.php?f=7&t=365 Edit - looks like you already found that one. You don't need to attach the timer interrupt to encoder1_read(). Delete this line: MyTim->attachInterrupt(encoder1_read); Systick polls the encoder at 1 millisecond in...

If you live in the USA and have Amazon prime, there are a couple of different STM32F407VET6 boards available for < $10 before tax. I ordered one on Sunday (the Black board with the onboard battery) and it arrived one day later. Basic tests blinky, RTC, and SerialUSB all compile and run without any p...

Review this information: https://github.com/stm32duino/wiki/wiki ... er-library
Note that 1.7mhz is not an integer multiple of 72 megahertz, so about as close as you can get is 72 / 42 = 1.714 Mhz.

Give the Pstring library a try: http://arduiniana.org/libraries/pstring/ float f=1.234; char buforS[9]; PString(buforS, sizeof(buforS), f,4); Serial.println(buforS); Before adding the code above to an existing program: 19012 / 3556. After adding: 22056 / 3556. Output: Sketch uses 22056 bytes (33%) o...

Quoting from a different thread: I would love to hear how well the APM32 functions. It seems very promising, except the costs are a bit high for smaller quantities. I am particularly curious if USB is fully functional at the higher clock rate, and whether power usage is comparable. 20 pieces from th...