text: #ifndef CCT_H_
  #define CCT_H_
  
  #include "xtensa/core-macros.h"
  #include "sdkconfig.h"
  
  #define  CCT_TICKS_PER_US 	CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ 
  
  void 		cct_delayUs(uint32_t us);
  uint32_t cct_intervalUs(uint32_t before, uint32_t after);
  float  	cct_intervalSecs(uint32_t before, uint32_t after);
  uint32_t	cct_setMarker();
  uint32_t cct_elapsedUs(uint32_t clockPrev);
  
  #endif