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//BTS7960 motor driver sketch

int R_IS = 2;
int R_EN = 5;
int R_PWM = 10;
int L_IS = 3;
int L_EN = 4;
int L_PWM = 9;

void setup() {
  // put your setup code here, to run once:
  pinMode(R_IS, OUTPUT);
  pinMode(R_EN, OUTPUT);
  pinMode(R_PWM, OUTPUT);
  pinMode(L_IS, OUTPUT);
  pinMode(L_EN, OUTPUT);
  pinMode(L_PWM, OUTPUT);
  digitalWrite(R_IS, LOW);
  digitalWrite(L_IS, LOW);
  digitalWrite(R_EN, HIGH);
  digitalWrite(L_EN, HIGH);
}

void loop() {
  // put your main code here, to run repeatedly:
  int i;
  for (i = 0; i <= 255; i = i + 10) { //clockwise rotation
    analogWrite(R_PWM, i);
    analogWrite(L_PWM, 0);
    delay(500);
  }
  delay(500);
  for (i = 0; i <= 255; i = i + 10) { //counter clockwise rotation
    analogWrite(R_PWM, 0);
    analogWrite(L_PWM, i);
    delay(500);
  }
  delay(500);
}