Added the setCpuFreq() method to change the cpu clock at run time

src/app/PowerManager.cpp

@@ -45,3 +45,8 @@ PowerManager::PowerInfo PowerManager::getPowerInfo(const uint16_t nbOfMeasures)
   
   return p;
 }
+
+bool PowerManager::setCpuFreq(uint8_t frequency)
+{
+  return system_update_cpu_freq(frequency);
+}

src/app/PowerManager.h

@@ -3,6 +3,7 @@
 
 #include "Arduino.h"
 #include "definition.h"
+#include <user_interface.h>
 
 class PowerManager
 {
@@ -20,6 +21,7 @@ class PowerManager
     ~PowerManager();
     
    PowerManager::PowerInfo getPowerInfo(const uint16_t nbOfMeasures = 5) const;
+   bool setCpuFreq(uint8_t frequency);
   protected:
     PowerManager();
   private: