Arduino mega 2560 serial port pins portable#

Sure, the Arduino pin functions are just intended to make the code more understandable to beginners and also make the code portable between different hardware. I'm betting that they can be manipulated using direct port commands such as 'PORTB |= _BV(7)' as in KRUPSKI'S example. You will sometimes see it written as D14 to indicate 'digital pin' 14 but you can't use that pin notation in the Arduino IDE. Is that just '14' or can it also be 'D14'

Arduino mega 2560 serial port pins software#

Public License along with this library if not, write to theįree Software Foundation, Inc., 59 Temple Place, Suite 330, You should have received a copy of the GNU Lesser General Lesser General Public License for more details. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. This library is distributed in the hope that it will be useful,īut WITHOUT ANY WARRANTY without even the implied warranty of Version 2.1 of the License, or (at your option) any later version.

Arduino mega 2560 serial port pins free#

License as published by the Free Software Foundation either Modify it under the terms of the GNU Lesser General Public This library is free software you can redistribute it and/or Pins_arduino.h - Pin definition functions for Arduino Here it is for the Mega 2560: arduino/ArduinoCore-avr/blob/master/variants/mega/pins_arduino.h /*

Maybe it would be helpful for you to study the code that is used for the Arduino pin definitions. They don't even really know what an ATmega2560 is or that its pins have different names in the datasheet and so long as they are using the Arduino functions they don't need to. A beginner will look at the numbers on the silkscreen on their board and just use them and it works fine without any confusion. It's interesting how your extra knowledge is actually hindering you in being able to use the Arduino core API. The numbers in pink are the Arduino pin numbers. More advanced users like to access pins and ports directly (such as ' PORTB |= _BV(7) ' to turn bit 7 on Port B on, but that statement will only work on the particular Atmel chip (2560, 328p, etc.) being used.ĭirect access bypasses the Arduino 'translation' layers and gives you a bit more speed, but in most cases it's easier to say something like ' digitalWrite (13, HIGH)' than it is to turn on a particular bit in a particular port to do the same thing.įor some reason I thought that these graphics that are common around the web would have some relation to the pin names used in the IDE However, the exact PIN that is used for pin 13 (such as 'PB7' or 'PK0' will be different from board to board. For example, 'Pin 13' will always respond to programming such as 'digitalWrite (13)' no matter what board you have. The various Arduino boards are setup to be easy to use. I've been using Nanos and Pro-minis almost exclusively up till now, and they don't have any repeated/duplicate pin names. this only took an hour to figure out why I couldn't get pin 89/8 to function properly. Why is pin 53/PC0 along the bottom edge also labeled A8? Addressing this pin as PK0, eg, pinMode(PK0, OUTPUT), does not create an error message, but it also doesn't set the pin.

When you do a pinMode(A8, OUTPUT), the pin that is set is 89/8 on the left side. Along the bottom edge, pin 53 is also shown as A8. Try this code to see what is coming back from the sensor. Serial2.readBytes() should return the number of bytes read. You still have not shown any evidence that any response is received.