perf_counter.hpp

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#pragma once
#include <imxrt.h>
 
#ifdef CORR_SIMULATOR
  #include "./../software/pseudoSerial.hpp"
#else
  #include <Arduino.h>
#endif
 
class PerfCounter
{
public:
  
  uint32_t Stack = 0; 
  uint32_t Count = 0; 
  uint32_t Cycles = 0; 
  uint32_t StartTime = 0; 
 
  void static init() __attribute__((always_inline))
  {
    ARM_DEMCR |= ARM_DEMCR_TRCENA;   //Enable Trace
    ARM_DWT_CTRL |= ARM_DWT_CTRL_CYCCNTENA; //Enable Cycle counting
  }
 
  void start() __attribute__((always_inline))
  {
    StartTime = ARM_DWT_CYCCNT;
  }
 
  void end() __attribute__((always_inline))
  {
    volatile uint32_t now = ARM_DWT_CYCCNT;
    Cycles =  now - StartTime;
    Stack += Cycles;
    Count++;
  }
 
  float inline mean()
  {
    return float(Stack)/float(Count);
  }
 
  uint32_t inline last_duration()
  {
    return Cycles;
  }
 
  void reset() __attribute__((always_inline))
  {
    Count = 0;
    Stack = 0;
    Cycles = 0;
  }
 
  void output() __attribute__((always_inline))
  {
    float_t mean_ = mean(); //Mean
    Serial.write((char8cast_t*)&(mean_), sizeof(float_t));
 
    //Serial.write((char8cast_t*)(last_duration()), sizeof(uint32_t)); //Last Cycles
 
  }
};