timer.c 1.3 KB

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  1. /* Copyright 2017 Fred Sundvik
  2. *
  3. * This program is free software: you can redistribute it and/or modify
  4. * it under the terms of the GNU General Public License as published by
  5. * the Free Software Foundation, either version 2 of the License, or
  6. * (at your option) any later version.
  7. *
  8. * This program is distributed in the hope that it will be useful,
  9. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11. * GNU General Public License for more details.
  12. *
  13. * You should have received a copy of the GNU General Public License
  14. * along with this program. If not, see <http://www.gnu.org/licenses/>.
  15. */
  16. #include "timer.h"
  17. static uint32_t current_time = 0;
  18. void timer_init(void) {
  19. current_time = 0;
  20. }
  21. void timer_clear(void) {
  22. current_time = 0;
  23. }
  24. uint16_t timer_read(void) {
  25. return current_time & 0xFFFF;
  26. }
  27. uint32_t timer_read32(void) {
  28. return current_time;
  29. }
  30. uint16_t timer_elapsed(uint16_t last) {
  31. return TIMER_DIFF_16(timer_read(), last);
  32. }
  33. uint32_t timer_elapsed32(uint32_t last) {
  34. return TIMER_DIFF_32(timer_read32(), last);
  35. }
  36. void set_time(uint32_t t) {
  37. current_time = t;
  38. }
  39. void advance_time(uint32_t ms) {
  40. current_time += ms;
  41. }
  42. void wait_ms(uint32_t ms) {
  43. advance_time(ms);
  44. }