Pinout

Motor Control Options

With the PWM pin held low, both motor outputs will be held low (a brake operation). With PWM high, the motor outputs will be driven according to the DIR input. This allows two modes of operation: sign-magnitude, in which the PWM duty cycle controls the speed of the motor and DIR controls the direction, and locked-antiphase, in which a pulse-width-modulated signal is applied to the DIR pin with PWM held high.

In locked-antiphase operation, a low duty cycle drives the motor in one direction, and a high duty cycle drives the motor in the other direction; a 50% duty cycle turns the motor off. A successful locked-antiphase implementation depends on the motor inductance and switching frequency smoothing out the current (e.g. making the current zero in the 50% duty cycle case), so a high PWM frequency might be required.

โค้ดโปรแกรมตัวอย่างการใช้งานด้วยบอร์ด Arduino

void setup()

{

  pinMode(7, OUTPUT);

  pinMode(9, OUTPUT);

}

void loop() 

{

   forward();

   delay(5000);

   reward();

   delay(5000);

   brake();

   delay(3000);

}

void forward()

{

  digitalWrite(7,LOW);

  analogWrite(9, 255);  

  delay(3000);              

  analogWrite(9, 100);    

  delay(3000);              

 }

void reward()

{

  digitalWrite(7,HIGH);

  analogWrite(9, 255);  

  delay(3000);              

  analogWrite(9, 100);    

  delay(3000);              

 }

 void brake()

{

  analogWrite(9, 0);  

}