不韋 呂 / Mbed 2 deprecated UIT2_ExecutionTime

Measurment of execution time for sin() and sinf() functions for ST Nucleo F401RE.

Dependencies:   mbed

Diff: main.cpp

Revision:
1:33dad37b0caf
Parent:
0:24dff9fbc559
--- a/main.cpp	Wed Oct 29 07:58:27 2014 +0000
+++ b/main.cpp	Wed Oct 29 08:06:05 2014 +0000
@@ -11,21 +11,24 @@
 
 int main()
 {
+    const int COUNT = 10;
     while (true)
     {
         if (sw1_ == 0)
         {
             dOut_.write(1);
-            float x1 = sinf(0.1f);
+            for (int n=0; n<COUNT; n++)
+                volatile float x1 = sinf(0.1f);
             dOut_.write(0);            
         }
         else
         {
             dOut_.write(1);
-            double x1 = sin(0.1);
+            for (int n=0; n<COUNT; n++)
+                volatile double x1 = sin(0.1);
             dOut_.write(0);            
         }
         
-        wait_us(50);   // 0.05 ms
+        wait_us(500);   // 0.05 ms
     }
 }