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Dependencies: TS_DISCO_F746NG BSP_DISCO_F746NG Graphics
RadarDemo/RadarTimer.cpp@3:732f7144ec81, 2016-11-05 (annotated)
- Committer:
- karpent
- Date:
- Sat Nov 05 15:36:59 2016 +0000
- Revision:
- 3:732f7144ec81
- Child:
- 4:66f13188c26b
RadarTimer class added
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| karpent | 3:732f7144ec81 | 1 | #include "RadarTimer.h" |
| karpent | 3:732f7144ec81 | 2 | #include "Commons.h" |
| karpent | 3:732f7144ec81 | 3 | |
| karpent | 3:732f7144ec81 | 4 | RadarTimer::RadarTimer() |
| karpent | 3:732f7144ec81 | 5 | { |
| karpent | 3:732f7144ec81 | 6 | |
| karpent | 3:732f7144ec81 | 7 | } |
| karpent | 3:732f7144ec81 | 8 | |
| karpent | 3:732f7144ec81 | 9 | RadarTimer::RadarTimer(uint32_t scanPeriod) |
| karpent | 3:732f7144ec81 | 10 | { |
| karpent | 3:732f7144ec81 | 11 | SetScanPeriod(scanPeriod); |
| karpent | 3:732f7144ec81 | 12 | } |
| karpent | 3:732f7144ec81 | 13 | |
| karpent | 3:732f7144ec81 | 14 | |
| karpent | 3:732f7144ec81 | 15 | void RadarTimer::SetScanPeriod(uint32_t scanPeriod) |
| karpent | 3:732f7144ec81 | 16 | { |
| karpent | 3:732f7144ec81 | 17 | _scanPeriod = scanPeriod * 1000; |
| karpent | 3:732f7144ec81 | 18 | } |
| karpent | 3:732f7144ec81 | 19 | |
| karpent | 3:732f7144ec81 | 20 | void RadarTimer::Start() |
| karpent | 3:732f7144ec81 | 21 | { |
| karpent | 3:732f7144ec81 | 22 | #ifndef _SDL_timer_h |
| karpent | 3:732f7144ec81 | 23 | start(); |
| karpent | 3:732f7144ec81 | 24 | #endif |
| karpent | 3:732f7144ec81 | 25 | } |
| karpent | 3:732f7144ec81 | 26 | |
| karpent | 3:732f7144ec81 | 27 | uint32_t RadarTimer::GetRunningTime() |
| karpent | 3:732f7144ec81 | 28 | { |
| karpent | 3:732f7144ec81 | 29 | #ifdef _SDL_timer_h |
| karpent | 3:732f7144ec81 | 30 | return SDL_GetTicks(); |
| karpent | 3:732f7144ec81 | 31 | #else |
| karpent | 3:732f7144ec81 | 32 | return read_ms(); |
| karpent | 3:732f7144ec81 | 33 | #endif |
| karpent | 3:732f7144ec81 | 34 | } |
| karpent | 3:732f7144ec81 | 35 | |
| karpent | 3:732f7144ec81 | 36 | |
| karpent | 3:732f7144ec81 | 37 | void RadarTimer::RegisterScan() |
| karpent | 3:732f7144ec81 | 38 | { |
| karpent | 3:732f7144ec81 | 39 | // Lock scan time |
| karpent | 3:732f7144ec81 | 40 | _runningTime = GetRunningTime(); |
| karpent | 3:732f7144ec81 | 41 | |
| karpent | 3:732f7144ec81 | 42 | // Reset scan time after one full turn |
| karpent | 3:732f7144ec81 | 43 | if (_runningTime >= (_lastScanTime + _scanPeriod)) { |
| karpent | 3:732f7144ec81 | 44 | _lastScanTime = _runningTime; |
| karpent | 3:732f7144ec81 | 45 | } |
| karpent | 3:732f7144ec81 | 46 | } |
| karpent | 3:732f7144ec81 | 47 | |
| karpent | 3:732f7144ec81 | 48 | |
| karpent | 3:732f7144ec81 | 49 | float RadarTimer::GetBeamAngle() |
| karpent | 3:732f7144ec81 | 50 | { |
| karpent | 3:732f7144ec81 | 51 | float angle = 2 * M_PI * (GetRunningTime() - _lastScanTime) / (float)_scanPeriod; |
| karpent | 3:732f7144ec81 | 52 | if(angle >= (2 * M_PI)) { |
| karpent | 3:732f7144ec81 | 53 | angle -= 2 * M_PI; |
| karpent | 3:732f7144ec81 | 54 | } |
| karpent | 3:732f7144ec81 | 55 | |
| karpent | 3:732f7144ec81 | 56 | return angle; |
| karpent | 3:732f7144ec81 | 57 | } |