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mstimer/mstimer.c@51:fb18aa3ec115, 2019-05-27 (annotated)
- Committer:
- andrewboyson
- Date:
- Mon May 27 10:11:37 2019 +0000
- Revision:
- 51:fb18aa3ec115
- Child:
- 63:b8443aef8d0d
Brought in the timer, random and scan modules as they fit better here.
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| andrewboyson | 51:fb18aa3ec115 | 1 | #include <stdint.h> |
| andrewboyson | 51:fb18aa3ec115 | 2 | #include <stdbool.h> |
| andrewboyson | 51:fb18aa3ec115 | 3 | |
| andrewboyson | 51:fb18aa3ec115 | 4 | #include "mstimer.h" |
| andrewboyson | 51:fb18aa3ec115 | 5 | #include "hrtimer.h" |
| andrewboyson | 51:fb18aa3ec115 | 6 | |
| andrewboyson | 51:fb18aa3ec115 | 7 | uint32_t MsTimerCount = 0; |
| andrewboyson | 51:fb18aa3ec115 | 8 | |
| andrewboyson | 51:fb18aa3ec115 | 9 | bool MsTimerAbsolute(uint32_t untilMs) //This uses signed comparison so it is limited to 24 days |
| andrewboyson | 51:fb18aa3ec115 | 10 | { |
| andrewboyson | 51:fb18aa3ec115 | 11 | return (int)(MsTimerCount - untilMs) > 0; |
| andrewboyson | 51:fb18aa3ec115 | 12 | } |
| andrewboyson | 51:fb18aa3ec115 | 13 | |
| andrewboyson | 51:fb18aa3ec115 | 14 | bool MsTimerRelative(uint32_t baseMsCount, uint32_t intervalMs) //This uses unsigned comparison so it is limited to 49 days |
| andrewboyson | 51:fb18aa3ec115 | 15 | { |
| andrewboyson | 51:fb18aa3ec115 | 16 | return MsTimerCount - baseMsCount >= intervalMs; |
| andrewboyson | 51:fb18aa3ec115 | 17 | } |
| andrewboyson | 51:fb18aa3ec115 | 18 | |
| andrewboyson | 51:fb18aa3ec115 | 19 | bool MsTimerRepetitive(uint32_t* pBaseMsCount, uint32_t intervalMs) |
| andrewboyson | 51:fb18aa3ec115 | 20 | { |
| andrewboyson | 51:fb18aa3ec115 | 21 | if (MsTimerCount - *pBaseMsCount >= intervalMs) //All unsigned wrap around arithmetic |
| andrewboyson | 51:fb18aa3ec115 | 22 | { |
| andrewboyson | 51:fb18aa3ec115 | 23 | *pBaseMsCount += intervalMs; |
| andrewboyson | 51:fb18aa3ec115 | 24 | return true; |
| andrewboyson | 51:fb18aa3ec115 | 25 | } |
| andrewboyson | 51:fb18aa3ec115 | 26 | return false; |
| andrewboyson | 51:fb18aa3ec115 | 27 | } |
| andrewboyson | 51:fb18aa3ec115 | 28 | |
| andrewboyson | 51:fb18aa3ec115 | 29 | void MsTimerMain() |
| andrewboyson | 51:fb18aa3ec115 | 30 | { |
| andrewboyson | 51:fb18aa3ec115 | 31 | static uint32_t baseCount = 0; |
| andrewboyson | 51:fb18aa3ec115 | 32 | |
| andrewboyson | 51:fb18aa3ec115 | 33 | if (HrTimerRepetitiveTick(&baseCount, HR_TIMER_COUNT_PER_SECOND / 1000)) MsTimerCount++; |
| andrewboyson | 51:fb18aa3ec115 | 34 | } |