[ardunio] two methods to control the steering gear

This is my participation in the 11th marine vehicle competition Of Option three ：Ardunio programme Control steering gear in
Detailed steering gear control reference -https://www.bilibili.com/video/BV15X4y157ay

The first method ：

analogWrite(pin, value)

This method can only make the steering gear in 0~90 Turn... Degrees And the input parameters can only be in [70,350] Between , Otherwise, it will not move , Can't meet my needs .

#define pinServo 11 /* Steering gear control pin   be based on ATmega168 and ATmega328 Of Arduino The controller ,
analogWrite() The function supports the following pins : 3, 5, 6, 9, 10, 11*/

// Steering angle   The tested value 
#define servoRight 70 
#define servoMiddle 210 
#define servoLeft 350 

void setup() 
{
    
   Serial.begin(9600);//  Serial initialization , Baud rate 9600 byte / second 
}

void loop() 
{
    
   prePWM = angle2Pwm(realAngle);// Calculate and return the corresponding  PWM
   analogWrite(pinServo,prePWM);
}

int angle2Pwm(int preAngle)
{
    // Convert the angle into the corresponding  pwm
    int realAngle;
    prePWM = float(255*(float)preAngle / 360); 
    return prePWM;
}

The second method ：

Servo library

The angle range that can be controlled is large , Meet my needs .nice

#include <Servo.h>
Servo myservo; // Create a steering gear control object 
#define pinServo 11// Steering gear control pin   be based on ATmega168 and ATmega328 Of Arduino The controller ,analogWrite() The function supports the following pins : 3, 5, 6, 9, 10, 11.

void setup() 
{
    
  myservo.attach(pinServo,500,2500); //  inform Arduino Which pin is the data line of the steering gear connected to .
}

void loop() 
{
     // Let the steering gear in 0~180 Turn back and forth 
    myservo.write(0);
    delay(1000);
    myservo.write(180);
    delay(1000);
}