Sample Code

/*!

* file motor.ino

* brief Show Show The motor turns clockwise or counterclockwise.

* Copyright

[DFRobot](http://www.dfrobot.com)

* Copyright GNU Lesser General Public License

*

* @author [DongZi](dongzi.liu@dfrobot.com)

* version

V1.0

* date

2017-07-05

*/

void setup() {

pinMode(4,OUTPUT);

/* define

pin (4,5,6,7) out*/

pinMode(5,OUTPUT);

pinMode(6,OUTPUT);

pinMode(7,OUTPUT);

}

void motor_c(char motor_n,char direction_m,int speed_m ) /* motor_n: the moto

r number to drive(0 stands for M1;1 stands for M2)*/

/* direction_m : the motor rotary direction(0 is clockwise and 1 is counter-c

lockwise).*/

/* speed_m: to control the motor rotation speed(from 0 to 255 ), the speed_m

value is larger, the rotation speed is faster;*/

{

if(motor_n==1)

{

if(direction_m==1)

{digitalWrite(4,HIGH);

// pin 4 controls M2 rotary direction analo

gWrite(5,speed_m);

//pin 5 controls M2 rotation speed

}

else

{digitalWrite(4,LOW);

analogWrite(5,speed_m);

}

}

else

{