A Php hardware pwm wrapper

PWM.php

<?php

/**

* @ Author: Chris

* @ Date: 5/25/2016

* @ Disc: Hardware pwm wrapper!

*/

  class PWM

  {

    private $channel;

    private $duty_cycle;

    private $frequency;

    private $delay;

    

    // Need to intilize pwm

    function __constructor()

    {

      $this->consoleCmd("ubus call i2c_exp pwm-exp '{\"command\":\"init\"}'");

    }

    // The SetPeriod function https://github.com/OnionIoT/i2c-exp-driver#set-period-command

    public function SetPeriod($pulse, $period)

    {

      return $this->ConsoleCmd("ubus call i2c_exp pwm-exp '{\"command\":\"set-period\", \"params\":{\"channel\":$this->channel, \"pulse\":$pulse, \"periods\":$period}}'");

    }

    

    public function SetChan($chn)

    {

      $this->channel = $chn;

    }

    // The SetDuty Command https://github.com/OnionIoT/i2c-exp-driver#set-command

    public function SetDuty($dtyCycl)

    {

      if($dtyCycl < 0.0000)

      {

        return "The DUTY CYCLE can be an integer or floating point number between 0 and 100";

      }

      elseif ($dtyCycl >100.0000)

      {

        return "The DUTY CYCLE can be an integer or floating point number between 0 and 100";

      }

      else

      {

        $this->duty_cycle = (float)$dtyCycl;

      }

      return $this->ConsoleCmd("ubus call i2c_exp pwm-exp '{\"command\":\"set\", \"params\":{\"channel\":\"$this->channel\",\"duty\":\"$this->duty_cycle\"} }'");

    }

    // The SetFreq Command Optional parameter

    public function SetFreq($dtyCycl, $freq)

    {

      if($dtyCycl < 0.0000)

      {

        return "The DUTY CYCLE can be an integer or floating point number between 0 and 100";

      }

      elseif ($dtyCycl >100.0000)

      {

        return "The DUTY CYCLE can be an integer or floating point number between 0 and 100";

      }

      else

      {

        $this->duty_cycle = (float)$dtyCycl;

      }

      if($freq < 24)

      {

        return "Frequency range is 24 Hz to 1526 Hz";

      }

      else if($freq > 1526)

      {

        return "Frequency range is 24 Hz to 1526 Hz";

      }

      else

      {

        $this->frequency = $freq;

      }

      return $this->ConsoleCmd("ubus call i2c_exp pwm-exp '{\"command\":\"set\", \"params\":{\"channel\":\"$this->channel\", \"duty\":\"$this->duty_cycle\", \"frequency\":\"$this->frequency\"} }'");

    }

    // The SetDelay Command Optional parameter

    public function SetDelay($dtyCycl, $freq, $delay)

    {

      if($dtyCycl < 0.0000)

      {

        return "The DUTY CYCLE can be an integer or floating point number between 0 and 100";

      }

      elseif ($dtyCycl >100.0000)

      {

        return "The DUTY CYCLE can be an integer or floating point number between 0 and 100";

      }

      else

      {

        $this->duty_cycle = (float)$dtyCycl;

      }

      if($freq < 24)

      {

        return "Frequency range is 24 Hz to 1526 Hz";

      }

      else if($freq > 1526)

      {

        return "Frequency range is 24 Hz to 1526 Hz";

      }

      else

      {

        $this->frequency = $freq;

      }

      if($delay < 0.0000)

      {

        return "The DUTY CYCLE can be an integer or floating point number between 0 and 100";

      }

      elseif ($delay >100.0000)

      {

        return "The DUTY CYCLE can be an integer or floating point number between 0 and 100";

      }

      else

      {

        $this->delay = (float)$delay;

      }

      return $this->ConsoleCmd("ubus call i2c_exp pwm-exp '{\"command\":\"set\", \"params\":{\"channel\":\"$this->channel\", \"duty\":\"$this->duty_cycle\", \"frequency\":\"$this->frequency,  \"delay\":\"$this->delay\"} }'");

    }

    // The Sleep Command https://github.com/OnionIoT/i2c-exp-driver#sleep-command

    public function Sleep()

    {

      return $this->ConsoleCmd("ubus call i2c_exp pwm-exp '{\"command\":\"sleep\"}'");

    }

    // A method so we can interface with console easy.

    private function ConsoleCmd($cmdToSend)

    {

      exec("$cmdToSend 2>&1", $output);

      return $output;

    }

  }

 ?>