Arduino for STM32

Blue pills usually do not have usb bootloader flashed. You need to do it yourself and for this you need ST-Link or USB-TTL adapter.

digitalWriteFast/digitalReadFast need 1 MCU cycle. that would be very difficult to do. digitalWriteFast() calls digital_io_write(), which goes through a if..then statement before calling LL_GPIO_SetOutputPin(), which goes to a set of register writes. Hard to believe all that could be done in one cy...

maybe something like this will help. #define LED_PORT GPIOC #define LED_PIN (1<<13) //LED on C13 #define IO_SET(port, pins) port |= (pins) #define IO_CLR(port, pins) port &=~(pins) #define IO_FLP(port, pins) port ^= (pins) #define GIO_SET(gpio, pins) IO_SET(gpio->ODR, pins) #define GIO_CLR(gpio...

There's "big" user error and your program crashes. ... Theta[200].... for(int n=2;n<200;n++) { ... Theta[n+1]=... } What do you mean? can you elaborate or suggest a fix? Theta is 200 element array - last element's index is 199. for(int n=2;n<200;n++) runs for n=2 to 199. There is no Theta...

... As Gonzo G suggested, I am not using digitalWriteFast anymore. I was expecting a higher speed. Am I wrong? Here is the code: #ifndef _NOP // required for some non Arduino cores #define _NOP() do { __asm__ volatile ("nop"); } while (0) #endif #define PIN PC13 void setup() { pinMode(PIN...

DON'T use any fast IO libraries with stm32duino.
1. this library for AVR based boards. With STM32 core it uses standard digitalWrite();
2. digitalWriteFast() and digitalReadFast() are a builtin functions in STM32 core.

There's "big" user error and your program crashes.

Hi, how can I set two (or more) different pwm-frequencys for two pwm-pins on STM32G071? I prefer analogWriteFrequency(herz), but I assume is only for all pwms - correct? analogWriteFrequency() is the easiest way. But it does not change frequency until analogWrite() i called and frequency changes on...

F103 does not have hardware usb upload method. You need to flash usb bootloader first (using ST-Link or serial adapter).
Also it won't show bluepill's COM port until there's a sketch with USB CDC enabled flashed to it.

You don't need any additional libraries. Use hardware timer: https://github.com/stm32duino/Arduino_Core_STM32/wiki/HardwareTimer-library There's "Timebase_callback" example in stm32duino examples that does what you need. And if you want fast, set optimization to -O3 and use digitalWriteFas...