With interrupts declared, when calling ledcWriteTone() to activate a buzzer, some internal conflict arises that causes the interrupt to be triggered continuously. I have 5 SPDT physical switches (to function as DIP switches) connected to 5 pins in an ESP32. If all pins are HIGH, all is good. One pi…

GROUND BOUNCE! I didn't even know it existed. After some deep Google-diving, it certainly looks as the missing Why: only PINs that are currently LOW are affected and the ground bounce probably happens in a clock cycle so the next immediate action after the "bounce" interrupt is another interrupt sh…

ledcWriteTone conflicts with Interrupts

Projects Programming

tahunus August 14, 2022, 4:53pm 11

Good point. As dumb luck would have it (this time), the ESP32 dev board is placed over headers, creating a 2mm air gap that saved the day. Thanks!!

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ledcWriteTone conflicts with Interrupts

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