The generally accepted control signals of stepper motor drivers are:
1, cw ccw, that is, positive pulse plus reverse pulse
2. pulse dir, that is, pulse plus direction
Generally, the drive can be compatible with two methods, that is, through the dip switch to choose which method to use.
In this way, you use the MCU control is very convenient, with two io port control signal is ok, which way can be, the frequency of the pulse size determines the speed of the motor.
Of course, you should also pay attention to the voltage size of the driver needs the signal, if it is 5v, direct io connection on the line, if you need 12v, then you need to add an optocouple on the line.