ARM, RISC-V контроллеры

int tim_low, tim_high, tim_high2;

tim_high = TIM_HIGH->CNT;
tim_low = TIM_LOW->CNT;
tim_high2 = TIM_HIGH->CNT;

while (tim_high != tim_high2)
{
    tim_high = tim_high2;
    tim_low = TIM_LOW->CNT;
    tim_high2 = TIM_HIGH->CNT;
}