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Judging from the code shown, you are using a method that won't correctly handle bounce and intermittent errors. I regard writing encoderPos - instead of encoderPos- as a perversion and suggest deleting that unnecessary space.Īs you haven't shown the PinB() interrupt handler, I don't know how you were going to handle the encoderPos++ case. In my opinion, that's a stupid and unnecessary feature I suggest that in your code you use standard C notation like 0B00001100 when you want to use binary constant values. That is, in the Arduino software environment, constant B00001100 has the value 0B00001100. The Arduino software environment defines constants like B00001100 with binary values that match the name. Similarly, delete the sei() at the end of PinA() because hardware restores interrupt status when a RETI instruction executes. Because hardware disables interrupts before it enters an interrupt handler, there is no need for the interrupt handler to turn off interrupts. PinA() is an interrupt handler, connected to interrupts by your attachInterrupt() calls. So the first if condition in PinA() is never met. Here are a few problems with the code shown in the question:ĪFlag is initialized to zero, and is never set nonzero in the code shown. See the sections “Using other pins for PCIs” and “ISR-framework-generating Sketch”. Note, in an answer at Can external interrupts be OR'd together on the '328 (Uno)? I show a couple of routines that will display appropriate masks for pins on different Arduinos. On the Mega, INT0.INT3 are PD0.PD3, and INT4,INT5 are PE4,PE5. Mega2560's have six INTx pins, vs two such on Uno's. I think on the Mega they are PORTH3 and PORTH4 respectively”, it's true that Arduino digital pins 2 and 3 belong to different ports on Uno vs Mega2560 boards. Extracting Frustum Planes (Hartmann & Gribbs method).Scale a normalized 2D vector always to the same length.How to setup Cocos2D-X (Android) under Mac OS X?.Using Lerp to create a hovering effect for a GameObject.How To Smoothly Animate From One Camera Position To Another.What are the advantages of having a real time based physics?.Understanding Unit圓d physics: where is the force applied?.Background processes - Arduino Mega and SeeedStudio CAN shield.
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Disabling i2c internal pull up resistors.Going from one shift register to two shift registers.Controlling multiple LED strips with arduino.arduino leonardo stops transmitting once hdmi cable is connected to a screen.However, I cannot use the given pins by the encoder (31/33) with these PCINs, means I have to find a solution to poll them somehow. Not sure why it does not work with Y_MIN_PIN (14) since it is PCINT10, I did try it again, but without success. It looks as if the library does not support to use INT7:0, this is the reason why it did not work with with X_MIN_PIN (3). Thanks to all of you for all your help to improve my understanding how these pin change interrupts work. Pin 10 is assigned to heaters and fans mosfet on the RAMPS 1.4 so I cannot use it, but I tried it with the pin A9 and it worked fine there. Now I understand that PCINT23:0 means a range of pins from PCINT0 to PCINT23, but it covers not all the pins on the ATmega2560.īTW, there is a document which explains the megaAVR interrups in general pretty good. and that they're different than "pin change interrupts", which work on all (or nearly all) of the pins. I picked that up there, but it did not notice that it was probably meant for a Atmega328 and not all ports of the ATmega2560 are covered by PCINTs. "The External Interrupts are triggered by the INT7:0 pin or any of the PCINT23:0 pins" The beeper (led) works fine if I uncomment the line in the loop code.Īny idea what could cause this issue that the interrupt does not work? I have tried the ports X_MIN_PIN (INT5), Y_MIN_PIN and BTN_ENC, but none of these work. This is my test code (slightly modified sample code) for the library which does not work for some reason: #include Tracing that problem back I found out, that it seems the problem comes from PCINT library which does not trigger the interrupt. I actually wanted to create an LCD menu which get controlled by the encoder, but then I noticed that the encoder did not work. My used hardwarea is an Arduino Mega with a RAMPS 1.4 shield and a RepRap Discount SmartController LCD including an encoder and button. I did try to run a simple sample code from the Pin Change Interrupt Library (PCINT) library, but for some reason it did not trigger the interrupt.