不韋 呂
/
UIT2_ExecutionTime
Measurment of execution time for sin() and sinf() functions for ST Nucleo F401RE.
main.cpp@1:33dad37b0caf, 2014-10-29 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Wed Oct 29 08:06:05 2014 +0000
- Revision:
- 1:33dad37b0caf
- Parent:
- 0:24dff9fbc559
2
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
MikamiUitOpen | 0:24dff9fbc559 | 1 | //-------------------------------------------------------------- |
MikamiUitOpen | 0:24dff9fbc559 | 2 | // Measurement execution time |
MikamiUitOpen | 0:24dff9fbc559 | 3 | // Use D7 |
MikamiUitOpen | 0:24dff9fbc559 | 4 | // 2014/10/29, Copyright (c) 2014 MIKAMI, Naoki |
MikamiUitOpen | 0:24dff9fbc559 | 5 | //-------------------------------------------------------------- |
MikamiUitOpen | 0:24dff9fbc559 | 6 | |
MikamiUitOpen | 0:24dff9fbc559 | 7 | #include "mbed.h" |
MikamiUitOpen | 0:24dff9fbc559 | 8 | |
MikamiUitOpen | 0:24dff9fbc559 | 9 | DigitalOut dOut_(D7); |
MikamiUitOpen | 0:24dff9fbc559 | 10 | DigitalIn sw1_(D2, PullDown); |
MikamiUitOpen | 0:24dff9fbc559 | 11 | |
MikamiUitOpen | 0:24dff9fbc559 | 12 | int main() |
MikamiUitOpen | 0:24dff9fbc559 | 13 | { |
MikamiUitOpen | 1:33dad37b0caf | 14 | const int COUNT = 10; |
MikamiUitOpen | 0:24dff9fbc559 | 15 | while (true) |
MikamiUitOpen | 0:24dff9fbc559 | 16 | { |
MikamiUitOpen | 0:24dff9fbc559 | 17 | if (sw1_ == 0) |
MikamiUitOpen | 0:24dff9fbc559 | 18 | { |
MikamiUitOpen | 0:24dff9fbc559 | 19 | dOut_.write(1); |
MikamiUitOpen | 1:33dad37b0caf | 20 | for (int n=0; n<COUNT; n++) |
MikamiUitOpen | 1:33dad37b0caf | 21 | volatile float x1 = sinf(0.1f); |
MikamiUitOpen | 0:24dff9fbc559 | 22 | dOut_.write(0); |
MikamiUitOpen | 0:24dff9fbc559 | 23 | } |
MikamiUitOpen | 0:24dff9fbc559 | 24 | else |
MikamiUitOpen | 0:24dff9fbc559 | 25 | { |
MikamiUitOpen | 0:24dff9fbc559 | 26 | dOut_.write(1); |
MikamiUitOpen | 1:33dad37b0caf | 27 | for (int n=0; n<COUNT; n++) |
MikamiUitOpen | 1:33dad37b0caf | 28 | volatile double x1 = sin(0.1); |
MikamiUitOpen | 0:24dff9fbc559 | 29 | dOut_.write(0); |
MikamiUitOpen | 0:24dff9fbc559 | 30 | } |
MikamiUitOpen | 0:24dff9fbc559 | 31 | |
MikamiUitOpen | 1:33dad37b0caf | 32 | wait_us(500); // 0.05 ms |
MikamiUitOpen | 0:24dff9fbc559 | 33 | } |
MikamiUitOpen | 0:24dff9fbc559 | 34 | } |