/******************************************************************
 * Filename: sound.c
 *
 * All pin numbers are wiringPi numbers unless otherwise specified.
 ******************************************************************/

#include <wiringPi.h>

int PWMpin = 1; // Alarm sound pin

/**************************************************************
 * main() function
 **************************************************************/
int main()
{
  wiringPiSetup();              // Setup required by wiringPi


  pinMode (PWMpin, PWM_OUTPUT); // Alarm sound pin
  pwmSetMode(PWM_MODE_MS);      // Mark/Space mode
  pwmSetClock(100);             // Default 100 (int)
  pwmSetRange(1024);            // Default 1024 (unsigned int)

  pwmWrite(PWMpin, 200);        // sound alarm
  delay(5000);                  // for five seconds.
  pwmWrite(PWMpin, 0);          // turn off alarm
  
  return 0; 
}