Issues Reading an encoder

Projects Programming
34

Just try this simple test sketch, see if you get stable counts.

unsigned long start;
const byte 
   encoderPinA = 3,
   encoderPinB = 4;
const uint16_t end = 300;
           
int speed;
volatile long pulse;           
long PulseCopy

void setup()
{
  Serial.begin(9600);
   attachInterrupt(digitalPinToInterrupt(encoderPinA), readEncoder, RISING);

  pinMode(encoderPinA,INPUT);
  pinMode(encoderPinB,INPUT);    
}

void loop()
{
  if(millis() - start > end)
  {
     noInterrupts();
     pulseCopy = pulse;
     interrupts();
     Serial.println(pulseCopy);
     start += end;     
  }
}
void readEncoder()
{
  digitalRead(4) ? --pulse : ++pulse;
}