tone.c 1.6 KB

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  1. /*
  2. * tone.c:
  3. * Test of the softTone module in wiringPi
  4. * Plays a scale out on pin 3 - connect pizeo disc to pin 3 & 0v
  5. *
  6. * Copyright (c) 2012-2013 Gordon Henderson. <projects@drogon.net>
  7. ***********************************************************************
  8. * This file is part of wiringPi:
  9. * https://projects.drogon.net/raspberry-pi/wiringpi/
  10. *
  11. * wiringPi is free software: you can redistribute it and/or modify
  12. * it under the terms of the GNU Lesser General Public License as published by
  13. * the Free Software Foundation, either version 3 of the License, or
  14. * (at your option) any later version.
  15. *
  16. * wiringPi is distributed in the hope that it will be useful,
  17. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19. * GNU Lesser General Public License for more details.
  20. *
  21. * You should have received a copy of the GNU Lesser General Public License
  22. * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
  23. ***********************************************************************
  24. */
  25. #include <stdio.h>
  26. #include <errno.h>
  27. #include <string.h>
  28. #include <wiringPi.h>
  29. #include <softTone.h>
  30. #define PIN 3
  31. int scale [8] = { 262, 294, 330, 349, 392, 440, 494, 525 } ;
  32. int main ()
  33. {
  34. int i ;
  35. if (wiringPiSetup () == -1)
  36. {
  37. fprintf (stdout, "oops: %s\n", strerror (errno)) ;
  38. return 1 ;
  39. }
  40. softToneCreate (PIN) ;
  41. for (;;)
  42. {
  43. for (i = 0 ; i < 8 ; ++i)
  44. {
  45. printf ("%3d\n", i) ;
  46. softToneWrite (PIN, scale [i]) ;
  47. delay (500) ;
  48. }
  49. }
  50. }