I will add a picture of my Arduino board showing the issue with the small selection of free pins.Ĭonnected and working are a RTC and relay board. The output is correct 6.6 seconds later. When newPos is 66 the ouput will freeze, but the turned positions will be recognized even when not polled. Just to show, that long lasting procedures don't break the rotary encoder: Read the current position of the encoder and print out when changed. This routine will only be called on any signal change on A2 and A3: exactly where we need to check.Įncoder.tick() // just call tick() to check the state. The Interrupt Service Routine for Pin Change Interrupt 1 PCMSK1 |= (1 << PCINT10) | (1 << PCINT11) // This enables the interrupt for pin 2 and 3 of Port C. PCICR |= (1 << PCIE1) // This enables Pin Change Interrupt 1 that covers the Analog input pins or Port C. You may have to modify the next 2 lines if using other pins than A2 and A3 Serial.println("SimplePollRotator example for the RotaryEncoder library.") Setup a RoraryEncoder for pins A2 and A3: The common contact should be attached to ground. Attach a rotary encoder with output pins to A2 and A3. The current position is printed on output when changed. This example checks the state of the rotary encoder in the loop() function. See Software License Agreement (BSD License) This work is licensed under a BSD style license. PinChangeInterrupts are different than normal Interrupts. This class is implemented for use with the Arduino environment. InterruptRotator.ino - Example for the RotaryEncoder library. For pins 20 (SDA) and 21 (SCL), it does not. These will be activated whenever there is any change of state on the pin. Of course it has its disadvantages, and the main one is that you cannot indicate when to trigger the interrupt as you would with hardware interrupts. For pins 2,3,18 and 19, the setup works as expected. The advantages of PCINT interrupts are that you can use any pin on the Arduino to trigger them (which is quite useful). When the voltage rises, an interrupt routine is executed. When I use pin 2 and 3 together with the sample code as below it works fine: When the IR light which shines on the phototransistor is blocked, the transistor causes an open circuit and the voltage at the pin rises. I cannot figure out how to connect the CLK and DT pins from my rotary encoder. The thing is, I'm using a 2,8" TFT with shield which occupies PIN 2 and 3. Tried pinMode, all sorts of available free PINs,etc. I am trying to make a beer brewing controller and am getting stuck on connecting the rotary encoder to any other PIN than I can find in posts or references online. My first post here, I hope not to violate any rules.
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