Arduino Motor PWM code – Electronics Freak

Here is Arduino Motor PWM code
//By Roee Bloch
//Arduino Motor PWM, in this example I am changing motor speed and directions
//All right Reserved
// Copyright (c) 2015 All Right Reserved, http://www.electronics-freak.com
//
// This source is subject to the Roee Bloch License.
// Please see the License.txt file for more information.
// All other rights reserved.
//
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// &lt;/copyright&gt;
// &lt;author&gt;Roee Bloch&lt;/author&gt;
// &lt;email&gt;roeebloch@walla.co.il&lt;/email&gt;
// &lt;date&gt;June 2015&lt;/date&gt;
int M1 = 3;      // Motor 1 this is connected to PWMR
int M2 = 5;      // Motor 1this is connected to PWML
// Also connect 2 enables pins to 5V (enable)
int val = 0;         // variable to store the read value
void setup()

{

  pinMode(M1, OUTPUT);   // sets the pin as output
  pinMode(M2, OUTPUT);   // sets the pin as output
  pinMode(8, OUTPUT);   // sets the pin as output
  pinMode(9, OUTPUT);   // sets the pin as output
  digitalWrite(8, HIGH); // enable Motor M1
  digitalWrite(9, HIGH); // enable Motor M1

}

void loop()

{
  for (int i = 1; i &lt; 255; i++)
  {
    analogWrite(3, i);
    analogWrite(5, 0);
    delay(50);
  }
  delay(200);
  for (int i = 1; i &lt; 255; i++)
  {
    analogWrite(5, i);
    analogWrite(3, 0);
    delay(50);
  }


}