| 摘要 |
<p>A human-machine interface system includes a master unit and a device bridge. The master unit includes a first processor and the device bridge includes a second processor, where the second processor is connected to the master unit through a bus and a device end through a device communication port. The device bridge has communication ability with the device end and processing ability. Therefore, the device bridge can report device status to the master unit. In design stage of the human-machine interface system, screen elements and device address transfer table are designed in parallel, and then the screen elements are merged with the device address transfer table. In operation stage of the human-machine interface system, the status of the device end can be written in internal memory of the device bridge. The master unit knows the status of the device end by reading the internal memory of the device bridge.</p> |
