How do I assign a digital pin to a port on ATMega 2560. It seems the pin assignment in pins.h is al

CharlesMakeAll · February 2016

I am trying to set up a laser using EXP3 on a RUMBA board. EXP3 (Expansion Port 3) has a pin which connects directly to Input/Output port PC7 (A15) . It is physical pin 60 on the ATMega 2560.

I plan to set a high signal on the port PC7 to start/stop the laser and PC6 for a router. I need to assign a digital pin within Repetier Firmware to do this but I am finding it impossible to determine which digital pin goes to which physical pin according to the AVR Datasheet.

For example:

Pin assignment        Repetier pin#    AVR Datasheet pin#
#define X_STEP_PIN         17        13
#define X_DIR_PIN          16        12
#define X_ENABLE_PIN       48       36

#define Y_STEP_PIN         54        97
#define Y_DIR_PIN          47        37
#define Y_ENABLE_PIN       55        96

#define Z_STEP_PIN         57        94
#define Z_DIR_PIN          56        95
#define Z_ENABLE_PIN       62        89

I cannot make heads or tails of this. I need to enable AVR Datasheet Pin# 60 for the Laser and Pin #59 for the Spindle.
I am finding it impossible to know which digital pin# in Repetier-Firmware which will let me do this.

How do I know which Digital Pin in Repetier-Firmware enables Pins PC7 and PC6 on an ATMega 2560??

Repetier · February 2016

Pin numbers are arduino pin numbers and have nothing to do with physical pins. Google arduino pinout mega and you will find images how these map to the real pins/analog ids etc.

CharlesMakeAll · February 2016

Thank you, that did it! Easy to do when you know what to look for and impossible to do if you don't. Thanks again!

How do I assign a digital pin to a port on ATMega 2560. It seems the pin assignment in pins.h is al

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