HDMI-CEC device and address allocation method of HDMI-CEC device network

摘要

A method allocates physical addresses HDMI-CEC devices within an HDMI-CEC device network. The HDMI-CEC device network includes a plurality of HDMI-CEC devices consisting of at least two root devices, a plurality of parent devices, and a plurality of slave devices. Each of the root devices has a root ID. When a slave device is plug into an HDMI interface of a parent device, the parent device allocates a root ID and a physical address for the slave device. The slave device creates a route table according to the allocated root ID and physical address, to establish a serial communication with the parent device.

主权项

1. An address allocation method for high definite multimedia interface consumer electrics control (HDMI-CEC) devices of an HDMI-CEC device network, the HDMI-CEC devices comprising a plurality of HDMI-CEC devices consisting of at least two root devices, a plurality of parent devices, and a plurality of slave devices, each root device having a root identification (ID), the method comprising:
confirming, by one slave device of the plurality of slave devices, whether or not a root ID and a physical address has been allocated for the slave device when the slave device is plugged into a HDMI interface of one parent device of the plurality of parent devices; sending, by the one slave device, a first address request to the one parent device if the slave device has not been allocated the root ID and the physical address; allocating, by the one parent device, the root ID and the physical address for the one slave device in response to receiving the first address request; and creating, by the one slave device, a routing table using the allocated root ID and the physical address to establish a serial communication with the one parent device.