blink.c 1.4 KB

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  1. /*
  2. * blink.c:
  3. * Standard "blink" program in wiringPi. Blinks an LED connected
  4. * to the first GPIO pin.
  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 <wiringPi.h>
  27. // LED Pin - wiringPi pin 0 is BCM_GPIO 17.
  28. #define LED 0
  29. int main (void)
  30. {
  31. printf ("Raspberry Pi blink\n") ;
  32. wiringPiSetup () ;
  33. pinMode (LED, OUTPUT) ;
  34. for (;;)
  35. {
  36. digitalWrite (LED, HIGH) ; // On
  37. delay (500) ; // mS
  38. digitalWrite (LED, LOW) ; // Off
  39. delay (500) ;
  40. }
  41. return 0 ;
  42. }