The timer with external interrupt issue.....

[Jason0416]

When use the timer, The external interrupts not work.........

stimer_t timer1; // Timer1

void.....(){
timer1.handle.Instance = TIM1;
TimerPulseInit(&timer1, 417, 0, IsrTim1);
.
.
.
pinMode(PA1, INPUT);
attachInterrupt(PA1, rxPinChanged, CHANGE);
}

The timer interrupt working, But the external interrupts no work.

[fpistm]

Hi, could you be more precise, please.
Which target? Full sketch,...

[Jason0416]

BluePill is the target. When change the pinMode to INPUT_PULLUP or INPUT_PULLDOWN, It's working........

[fpistm]

And what is wired on PA1? and How?

[Jason0416]

[fpistm]

I guess in INPUT the voltage level is not proper (10k too high?) that's why the CHANGE level is not detect.
Using the INPUT_PULL* probably clean the level.

[Jason0416]

I will test it and the results will be reported here. Thks.

[Jason0416]

Yes! The resistor is to small.....