void handler_channel_1(void) {
    measured_time = TIMER2_BASE->CCR1 - measured_time_start;
    if (measured_time < 0)measured_time += 0xFFFF;
    measured_time_start = TIMER2_BASE->CCR1;
    if (measured_time > 3000)channel_select_counter = 0;
    else channel_select_counter++;

    if (channel_select_counter == 1)channel_1 = measured_time;
    if (channel_select_counter == 2)channel_2 = measured_time;
    if (channel_select_counter == 3)channel_3 = measured_time;
    if (channel_select_counter == 4)channel_4 = measured_time;
    if (channel_select_counter == 5)channel_5 = measured_time;
    if (channel_select_counter == 6)channel_6 = measured_time;
  }