This is a very simple driver for the Boldport project #28 "3x7". It is specifically written for Arduino UNO and compatible boards which use the ATmega328P chip and running at 16 MHz.

Two pin configurations are supported. Basically sequentially connect the pins from the Arduino board, starting with pin 2 or pin 4 to the display. Except the GND, which is not in sequence.

The operative configuration is specified with the Pins parameter to the library initialize function.

There is no functional difference in the configurations, they just leave different pins free. For example, the alternative configuration allows a program to use external interrupts on pins 2 and 3.

Please note: This driver shall just provide a well designed example how to drive this kind of displays. Most likely you will have to adapt the driver for your particular use case.

(c)2018 by Lucky Resistor. See LICENSE for details.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.