不韋 呂
Measurment of execution time for sin() and sinf() functions for ST Nucleo F401RE.
Diff: main.cpp
- Revision:
- 0:24dff9fbc559
- Child:
- 1:33dad37b0caf
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Oct 29 07:58:27 2014 +0000
@@ -0,0 +1,31 @@
+//--------------------------------------------------------------
+// Measurement execution time
+// Use D7
+// 2014/10/29, Copyright (c) 2014 MIKAMI, Naoki
+//--------------------------------------------------------------
+
+#include "mbed.h"
+
+DigitalOut dOut_(D7);
+DigitalIn sw1_(D2, PullDown);
+
+int main()
+{
+ while (true)
+ {
+ if (sw1_ == 0)
+ {
+ dOut_.write(1);
+ float x1 = sinf(0.1f);
+ dOut_.write(0);
+ }
+ else
+ {
+ dOut_.write(1);
+ double x1 = sin(0.1);
+ dOut_.write(0);
+ }
+
+ wait_us(50); // 0.05 ms
+ }
+}