STM32 interrupts not working

[Vasn]

Hello all,

Could anyone explain me what's wrong with this code in a C++ library:

.h file

class PSM
{
public:
    PSM(uint32_t sensePin, uint32_t mode = RISING);
    
    static void onInterrupt();
    
    unsigned int cps();
    
private:
	void calculateSkip();
    
	volatile unsigned int _a;
};

.cpp file

static PSM * _thePSM;

PSM::PSM(uint32_t sensePin, uint32_t mode)
{
    _thePSM = this;

    pinMode(sensePin, INPUT_PULLUP);

    attachInterrupt(digitalPinToInterrupt(sensePin), onInterrupt, mode);
}

void PSM::onInterrupt(void)
{    
    _thePSM->calculateSkip();
}

void PSM::calculateSkip(void)
{
    PSM::_a++;
}

unsigned int PSM::cps()
{
    return PSM::_a
}

The point is obviously to count impulses on a sensePin.

This code works on AVR, but doesn't work on STM32.

If I write the same attachInterrupt in the .ino, it works.

What could be wrong with the code? I'm not a C++ pro, maybe it's something obvious.

I've also used this as a reference.

[johnwasser]

What STM32 Arduino are you using?

Note: Missing a ';' at the end of this line:

@Vasn

return PSM::_a

Note: You can access member variables through a pointer so this:

void PSM::onInterrupt(void)
{    
    _thePSM->calculateSkip();
}

void PSM::calculateSkip(void)
{
    PSM::_a++;
}

can be reduced to this:

void PSM::onInterrupt(void)
{    
    _thePSM->_a++;
}

[Vasn]

I'm using STM32Duino with a Blackpill on STM32F411.

I lost ; while editing the code for the post, it present in the actual code

Note: Missing a ';' at the end of this line:

Apparently the code works if built in PlatformIO. For now it seems isolated to the Arduino IDE. I'm going to do more tests to locate the problem.