Interlock1

void SCM::ManagePCAEnable() {
  if (m_bPCAOutputEnabled) {
    GPIO1_HIGH;
    m_bPCAOutputEnabled = false;
    OCR1A = 155;
  }
  else {
    m_nPCAEnableWindowCountdown--;

    // Protection against loss of communication from COM module.
    if (m_nPCAEnableWindowCountdown > 0) {
      GPIO1_LOW;
      m_bPCAOutputEnabled = true;
    }
    OCR1A = 15;
  }
}