This is the 'begin' lines for some common configurations. Note that for LMD18200, the two final arguments must be adapted to your need... The wiring for these configurations is visible here : http://www.locoduino.org/spip.php?article187 . The text is in french, but schemas can be understood !
DCCpp.beginMain(UNDEFINED_PIN, DCC_SIGNAL_PIN_MAIN, 3, A0);
DCCpp.beginMain(UNDEFINED_PIN, DCC_SIGNAL_PIN_MAIN, 3, A0); DCCpp.beginProg(UNDEFINED_PIN, DCC_SIGNAL_PIN_PROG, 5, A1);
DCCpp.beginMain(UNDEFINED_PIN, DCC_SIGNAL_PIN_MAIN, 3, A0);
DCCpp.beginMain(UNDEFINED_PIN, DCC_SIGNAL_PIN_MAIN, 3, A0); DCCpp.beginProg(UNDEFINED_PIN, DCC_SIGNAL_PIN_PROG, 11, A1);
DCCpp.beginMainMotorShield(); DCCpp.beginProgMotorShield();
or
DCCpp.beginMain(MOTOR_SHIELD_DIRECTION_MOTOR_CHANNEL_PIN_A, DCC_SIGNAL_PIN_MAIN, MOTOR_SHIELD_SIGNAL_ENABLE_PIN_MAIN, MOTOR_SHIELD_CURRENT_MONITOR_PIN_MAIN); DCCpp.beginProg(MOTOR_SHIELD_DIRECTION_MOTOR_CHANNEL_PIN_B, DCC_SIGNAL_PIN_PROG, MOTOR_SHIELD_SIGNAL_ENABLE_PIN_PROG, MOTOR_SHIELD_CURRENT_MONITOR_PIN_PROG);
DCCpp.beginMainPololu(); DCCpp.beginProgPololu();
or
DCCpp.beginMain(POLOLU_DIRECTION_MOTOR_CHANNEL_PIN_A, DCC_SIGNAL_PIN_MAIN, POLOLU_SIGNAL_ENABLE_PIN_MAIN, POLOLU_CURRENT_MONITOR_PIN_MAIN); DCCpp.beginProg(POLOLU_DIRECTION_MOTOR_CHANNEL_PIN_B, DCC_SIGNAL_PIN_PROG, POLOLU_SIGNAL_ENABLE_PIN_PROG, POLOLU_CURRENT_MONITOR_PIN_PROG);