blink.c 1.7 KB

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  1. /*
  2. * blink.c:
  3. * Simple "blink" test for the PiFace interface board.
  4. *
  5. * Copyright (c) 2012-2013 Gordon Henderson. <projects@drogon.net>
  6. ***********************************************************************
  7. * This file is part of wiringPi:
  8. * https://projects.drogon.net/raspberry-pi/wiringpi/
  9. *
  10. * wiringPi is free software: you can redistribute it and/or modify
  11. * it under the terms of the GNU Lesser General Public License as published by
  12. * the Free Software Foundation, either version 3 of the License, or
  13. * (at your option) any later version.
  14. *
  15. * wiringPi is distributed in the hope that it will be useful,
  16. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18. * GNU Lesser General Public License for more details.
  19. *
  20. * You should have received a copy of the GNU Lesser General Public License
  21. * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
  22. ***********************************************************************
  23. */
  24. #include <stdio.h>
  25. #include <wiringPi.h>
  26. #include <piFace.h>
  27. // Use 200 as the pin-base for the PiFace board, and pick a pin
  28. // for the LED that's not connected to a relay
  29. #define PIFACE 200
  30. #define LED (PIFACE+2)
  31. int main (int argc, char *argv [])
  32. {
  33. printf ("Raspberry Pi PiFace Blink\n") ;
  34. printf ("=========================\n") ;
  35. // Always initialise wiringPi. Use wiringPiSys() if you don't need
  36. // (or want) to run as root
  37. wiringPiSetupSys () ;
  38. // Setup the PiFace board
  39. piFaceSetup (PIFACE) ;
  40. for (;;)
  41. {
  42. digitalWrite (LED, HIGH) ; // On
  43. delay (500) ; // mS
  44. digitalWrite (LED, LOW) ; // Off
  45. delay (500) ;
  46. }
  47. return 0 ;
  48. }