电机驱动模块

#define MOTOR_PIN   7

#define PWM_FREQ        500000  // 设置频率
#define PWM_RESOLUTION  6       // 计数位数，取值0 ~ 20
#define MAX_DUTY_CYCLE  63      // 2^10 - 1, if PWM resolution is 6, then it is 2^6 - 1 = 63
#define DUTY_COUNT      1

int dutyCycle = 0;
bool duty_flag = true; 

void setup() 
{
  Serial.begin(115200);
  ledcAttach(MOTOR_PIN, PWM_FREQ, PWM_RESOLUTION);
}
void loop() 
{
  float duty = dutyCycle*100/MAX_DUTY_CYCLE;
  Serial.print("Duty Cycle:");
  Serial.print(duty);
  Serial.println("%");

  if(dutyCycle == 0)
  {
    duty_flag = true;
  }
  if(dutyCycle == MAX_DUTY_CYCLE)
  {
    duty_flag = false;
  }

  if (duty_flag == true)
  {
    dutyCycle = dutyCycle + DUTY_COUNT;
  }else
  {
    dutyCycle = dutyCycle - DUTY_COUNT;
  }
 
  ledcWrite(MOTOR_PIN, dutyCycle);
  delay(100);
}