#include <wiringPi.h>
 
int main( int argc, char** argv )
{
 
  if( wiringPiSetup() == -1 )
    return 1;
 
  pinMode( 1, PWM_OUTPUT ); // BCM GPIO pin 18

  pwmSetMode( PWM_MODE_MS );
  pwmSetClock( 1920 );
  pwmSetRange( 200 );
  pwmWrite( 1, 10 );

  return 0 ;

}