Qunqi A4988 Driver CNC Shield Expansion Board for Arduino V3 Engraver

/ / The following is a simple stepper motor control procedures
# define EN 8 / / stepper motor enable , active low # define X_DIR 5 / / X -axis stepper motor direction control # define Y_DIR 6 / / y -axis stepper motor direction control # define Z_DIR 7 / / z axis stepper motor direction control # define X_STP 2 / / x -axis stepper control # define Y_STP 3 / / y -axis stepper control # define Z_STP 4 / / z -axis stepper control / * / / Function : step . function: to control the direction of the stepper motor , the number of steps . / / Parameters : dir direction control , dirPin corresponding stepper motor DIR pin , stepperPin corresponding stepper motor " step " pin , Step number of step of no return value. * / void step (boolean dir, byte dirPin, byte stepperPin, int steps) { digitalWrite (dirPin, dir); delay (50); for (int i = 0; i