Arduino mega 2560 86 io pins4/13/2024 This means you can use this library only if you connect the encoder to interrupt-capable IO-pins which on a Arduino Mega are IO-pins 2, 3, 18, 19, 20, 21Īrduinos Una/Mega are limited if you want to connect a lot of devices that need interrupts or high-speed communication. Me personal I prefer using the NewEncoder-library. Not using interrupts for encoder-reading means that your main-loop must repeat faster than your fastest encoder-pulsetrain to catch all encoder-pulses. Yes, the digital pins 2-5 on the mega map to PE 3,4,5 and PG 5, and you will want to use digital pins on the same bus, maybe PA 0-3 (mega digital pins 22,23,24,25). So if IO-pins 18,19 or 20,21 are not used yet you can try on these IO-pins. You can use any pins for the LCD, the interface is parallel, and will work with any DIO pins. On an arduino Mega 2560 the following IO-pins are interrupt-cabaple So it might be that the encoder is read by interrupts if you use the encoder on interrupt-pinsīut I'm not familiar with the Encoder.h-library. Serial.println("Reset myEncoder to zero") if a character is sent from the serial monitor, Serial.print(newPosition * angperpulse, 3) It has 54 digital input/output pins (of which 15 can be used as PWM. TYpical 4-> A=0 B=0, A=1 B=0, A=1 B=1 & A=0 B=1įloat angperpulse = 360 / (cpr*ppc) // Angle per pulse The Arduino Mega 2560 R3 is a microcontroller board based on the ATmega2560 (datasheet). The lcd can be hooked up to any pins specified in its 'constructor', and migrating to a Mega is pretty straightforward. Int inPin = 7 // pushbutton connected to digital pin 7Ĭonst unsigned long timePeriod = 1000 //1000 milisecondsįloat cpr = 2000 //Cycles per revolution (from the encoder)įloat ppc = 4 //Pulses per Cycle (from encoder. That pin is not broken out on a Mega, and the code needs to be changed to use Timer4 or 5 which have ICP pins broken out on digital pins 49 and 48. I would be grateful if someone can guide me in solving this. If I connect back to any pin digital 2 to 13, it reads well. I wanted to use two digital pins 23 to 53 in the Arduino mega, I have used pins 44 to 46, 52 & 53, pretty much all from 23 to 53, and the readings I got are erroneous. But the TFT uses digital pins 2 and 3, and actually all pins from 2 to 13. My idea is to use a TFT display to show the angle. The code below works well when connecting my encoder to Digital pins 2 and 3. I am working on a project where I use an encoder to measure an angle.
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