Function any_serial_data_available

Marlin/src/gcode/queue.cpp:292–297

Multiserial already handles dispatch to/from multiple ports

#if NO_TIMEOUTS > 0
  // Multiserial already handles dispatch to/from multiple ports
  static bool any_serial_data_available() {
    for (uint8_t p = 0; p < NUM_SERIAL; ++p)
      if (serial_data_available(p))
        return true;
    return false;
  }
#endif

inline int read_serial(const serial_index_t index) { return SERIAL_IMPL.read(index); }