![]() Digital I/O Pins 54 (of which 15 provide PWM output) Analog Input Pins 16. I already discussed the Arduino UNO PinoutArduino Nano Pinout in the previous tutorials. These 54 digital pins can only read two values i,e. The Mega2560 Pro Mini board has all the IOs of Arduino Mega2560 R3, following are the parameters. JanuRavi Teja In this tutorial, we will have a brief overview about the Arduino Mega Board, the layout of a typical Mega board, some of the important specifications and finally the Arduino Mega Pinout. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. DecodeIR() // Go get IR code if not using interrupt. The Arduino mega2560 has the most number of digital pins in the Arduino family and it is one of the reasons why it is called Arduino Mega. Arduino Mega 2560 is also packed with additional features like Analog Comparator, External Interrupt & Software Interrupt, Power Saving Mode, Inbuilt Temperature Sensor, RTC and more. Each of the 50 digital pins on the Arduino Mega ADK can be used as an input or output, using pinMode (), digitalWrite (), and digitalRead () functions. ![]() Int toggle = 0 // The RC5/6 toggle stateĪttachInterrupt(digitalPinToInterrupt(2), DecodeIR, FALLING) IR variables -īyte IRbits // Length of the IR code in bits When the IR light which shines on the phototransistor is blocked, the transistor causes an open circuit and the voltage at the pin rises. ![]() IRrecv irrecv(RECV_PIN) // Set up the IR decoder Some schematics led me to believe Pin 18 for example is Analog input 4. I have pin 2, and 3 working quite well however. However I cannot seem to find these last 4 pins. The whole program is long and messy, but here is the relevant part (The interrupt is working on pin 2 - checked that with a serial.print statement). The Mega 2560 is capable of 6 external interrupts, which are 0-5 on pins 2, 3, 21, 20, 19, 18 respectively. So, I need to add an interrupt to catch any incoming IR, but I just cannot get the code correct. When it's the only thing in the main loop, it works fine.īut, when the loop starts doing anything else, it misses the start of the incoming IR data, therefore reporting an unknown IR code. Normally you should use digitalPinToInterrupt (pin) to translate the actual digital pin to the specific interrupt number. I have a routine that detects incoming IR (IRremote library). attachInterrupt () External Interrupts Description Digital Pins With Interrupts The first parameter to attachInterrupt () is an interrupt number.
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