ESP8266 Community Forum

- Sat Oct 14, 2017 5:00 pm #70862 I have written a counter for my ESP8266-07 that uses interrupts, but sometimes it craches. The code is quite simple.
Sometimes it works for several "completions" - other times it craches when the counter is e.g. 600 or 900.
I have tried with two different ESP modules and its running stable if I disable the "attachInterrupt" code.

Any input is appreciated.

Code: Select allconst int pinFlowmeter = 13;

volatile unsigned int intCounter=0;


void setup() {
}

void loop() {
   if (intCounter >= 1000) {
      detachInterrupt(digitalPinToInterrupt(pinFlowmeter));
      Serial.println("Complete");
      intCounter = 0;
      buttonPressed = false;
   }

 // ... other stuff
}

void pressButton() {
   if (!buttonPressed) {  // prevent calling this several times
      attachInterrupt(digitalPinToInterrupt(pinFlowmeter), getcount, CHANGE);
      buttonPressed = true;
   }
}

void getcount() {
  intCounter++;
}



Last edited by Lars Bo Wassini on Sun Oct 15, 2017 7:52 am, edited 1 time in total.

Thanks

Lars Bo Wassini

- Sat Oct 14, 2017 5:42 pm #70864 What is the pulse rate?

How about posting complete minimum sketch that you have tried. It doesn't have to be much more than you have. But it must compile and it must execute. I can add in the parts that you have missing but that will not be exactly what you have.

- Sat Oct 14, 2017 6:37 pm #70865 I get no crashing. But I needed to modify your sketch since it isn't complete.

- Sun Oct 15, 2017 2:28 am #70868 Hi,
most important thing for isr: has to be in IRAM!

void ICACHE_RAM_ATTR getcount(void)

in case it is not in IRAM there can be problem with caching (probably hw fault).