No Description

a110x-intr.cxx 2.1KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576
  1. /*
  2. * Author: Jon Trulson <jtrulson@ics.com>
  3. * Copyright (c) 2015 Intel Corporation.
  4. *
  5. * Permission is hereby granted, free of charge, to any person obtaining
  6. * a copy of this software and associated documentation files (the
  7. * "Software"), to deal in the Software without restriction, including
  8. * without limitation the rights to use, copy, modify, merge, publish,
  9. * distribute, sublicense, and/or sell copies of the Software, and to
  10. * permit persons to whom the Software is furnished to do so, subject to
  11. * the following conditions:
  12. *
  13. * The above copyright notice and this permission notice shall be
  14. * included in all copies or substantial portions of the Software.
  15. *
  16. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17. * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18. * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19. * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20. * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21. * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22. * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23. */
  24. #include <unistd.h>
  25. #include <iostream>
  26. #include <signal.h>
  27. #include "a110x.h"
  28. using namespace std;
  29. int shouldRun = true;
  30. void sig_handler(int signo)
  31. {
  32. if (signo == SIGINT)
  33. shouldRun = false;
  34. }
  35. // Our pulse counter
  36. volatile unsigned int counter = 0;
  37. // Our interrupt handler
  38. void hallISR(void *arg)
  39. {
  40. counter++;
  41. }
  42. int main ()
  43. {
  44. signal(SIGINT, sig_handler);
  45. //! [Interesting]
  46. // Instantiate an A110X sensor on digital pin D2
  47. upm::A110X* hall = new upm::A110X(2);
  48. // This example uses a user-supplied interrupt handler to count
  49. // pulses that occur when a magnetic field of the correct polarity
  50. // is detected. This could be used to measure the rotations per
  51. // minute (RPM) of a rotor for example.
  52. hall->installISR(hallISR, NULL);
  53. while (shouldRun)
  54. {
  55. cout << "Pulses detected: " << counter << endl;
  56. sleep(1);
  57. }
  58. //! [Interesting]
  59. cout << "Exiting..." << endl;
  60. delete hall;
  61. return 0;
  62. }