app/abs.c


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#include "project.h"


static uint32_t high_tick;


uint64_t abs_extend (uint32_t now)
{
  static uint32_t then;


  uint64_t ret;


  if (now < then)
    high_tick++;

  then = now;


  ret = high_tick;
  ret <<= 32;
  ret |= now;

  return ret;
}


uint64_t abs_get (void)
{
  uint32_t now = SCS_DWT_CYCCNT;
  return abs_extend (now);
}


void abs_slow_tick()
{
  abs_get();
}