Hi everyone, Hardware: NUCLEO-F767ZI ( NUCLEO-F767ZI | Mbed ) I’m trying to detect rising edges on two different pins: PF_14 and PF_15. I provided some signals locally (using the same board: NUCLEO-F767ZI). I used PD_12 and PD_13 to create two PWM signals and I wired these two pins to the counter …

Hi, I think that the problem is you are using same PWM channel. PD_12 = PWM4/1 PD_13 = PWM4/2 If I change the myPWM1 pin from PD_12 to PA_0 (PWM2/1), it works as expected. Count1: 0. Count2: 0 Count1: 500. Count2: 1000 Count1: 1001. Count2: 2002 Count1: 1502. Count2: 3004 Count1: 2003. Count2: …

Hello, first of all, place this out of while loop, it makes no sense. [image] Yassine_Ezzaroual: myPWM1.period(1.0 / 500.0f); myPWM1.write(0.5f); myPWM2.period(1.0 / 1000.0f); myPWM2.write(0.5f); Did you try it with another pins? BR, Jan

Hi JohnnyK, sorry somehow I forgot it inside the loop. Yes I’ve tried it multiple times with different pins. It didn’t work. best regards, Yassine

it works. Do you have any idea why it doesn’t work when I put it in my main code ? Here is the code: #include “mbed.h” #include #include #include // Parameter des Einspritzsignals AnalogIn t_oefnen(PA_3); AnalogIn t_einspritzen(PC_0); DigitalIn BM1_BM2(PB_8); // Auswahl des Betriebsmodu…

Hi, PE_11 PWM1/2 PB_9 PWM4/4 PD_13 PWM4/2 PA_0 PWM2/1 You are still using same channel of the PWM. Or, the Timer instance probably conflict timer resource with PWM?

Ups! I thought shared pwm channels cause problems only in interruptIn. It’s working properly. many thanks! Do you have any idea where can I find these kind of limitations? best regards, ezzow

[image] Yassine_Ezzaroual: Do you have any idea where can I find these kind of limitations? Because the hardware has limited resource. The PwmOut is implemented to use timer resource for STM32. You can not set different timer values to single hardware timer. Thanks, Toyo

Counting rising edges on two different pins doesn't work properly :(

Mbed OS

JohnnyK (Jan Kamidra) March 14, 2023, 6:47am 9

Below on this page is a description about PWM pins - ST - pinout_labels - | Mbed

BR, Jan

1 Like

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Counting rising edges on two different pins doesn't work properly :(

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