Arduino for STM32

GonzoG wrote: Sat Aug 13, 2022 10:40 am What are your board settings ??
As Serial might be USB Serial, not UART.

hi，thanks.my board setting is UART.

my board is stm32f401cc，and IDE is PlatformIO in vscode.
https://cbu01.alicdn.com/img/ibank/O1CN01JlN5Fc1NzcdIfAIg8_!!2891711641-0-cib.jpg
When I build and upload the code (via serial port), I open the monitor with serial port but can't see any data, thanks for your help


#include <Arduino.h ...

fpiSTM wrote: Mon Mar 15, 2021 5:32 pm Your code get each led OFF 2 second and ON 1s.
Is this expected ?

yeah,A total of three three-color leds.
When the pin is low, the LED will on.
Therefore, when one LED is turned on, the other two LEDs need to be kept off

the code looks ok, among the things you may like to check if you are running at the expected system clock speeds for your board. that would have something to do with the crystal frequency


Hey，The crystal is 12mhz.
I also tried to set board = blackpill_f401cc, but the flashing time became faster ...

Hello everyone, I have a core board of F401CCU6. In the first test, I lighted three rgb leds.

The interval time is 1000ms,.
but after I upload the program, the interval between the two colors is about 2000ms.
This is much slower than in my code.

#include "Arduino.h"
int red = 0;
int green = 1 ...

in addition use the 'correct' (i.e. official) core.
https://github.com/stm32duino/Arduino_Core_STM32
it may be feasible to use 'libmaple', but that this isn't one of the pre-defined boards
https://github.com/rogerclarkmelbourne/Arduino_STM32/tree/master/STM32F4/variants
which means u'd need to ...

do note that the api specs for HardwareTimer in the official stm core is different from that in libmaple
https://github.com/stm32duino/wiki/wiki/HardwareTimer-library
did you try
void attachInterrupt(callback_function_t callback);
instead?
another thing is
#include <HardwareTimer.h>
right at ...

I want to test the execution time of the function "digitalReadFast(digitalPinToPinName(pin))"
When I execute the print function, the loop time of the entire loop() is 1146 μs


#include "Arduino.h"

void setup() {
Serial.begin(9600);
}

void loop() {

unsigned int timecnt;
timecnt = micros ...

Thanks for your reply, I tried the function you suggested, but the loop is still 1100 microseconds after using this function

The software (simple FOC) and the development board (Nucleo F446RE) are fully compatible. Because I tried the same operation a few days ago, but the driver I used is DRV8302 15A

I think this is a pure hardware problem, please check whether your wiring and hardware are normal. It is recommended to ...