HDMI-CEC Applications

The relation between Application, Connection and CEC-Bus is described in the figure.

CEC Daemon

This daemon receives Raw Bytes from the SoC Driver and dispatches them into IARM Bus via CecIARMMgr, it also receives Raw Bytes from IARM Bus and send to the SoC Driver. It controls the only access point to the physical HDMI CEC Bus.

Receiver

This application receives Raw Bytes from IARM Bus and dispatch to Service Manager (which in turn may dispatch the bytes to Guide Application). It also receives Raw bytes from Service Manager and send to the IARM-Bus.

CECDevMgr

This application is a "sniffer" on the CEC Bus. It monitors all messages on the bus and construct a Device Map, which depicts the topology of all connected devices on the CEC Bus. Other applications can be developed similar to Receiver or CECDevMgr where the CEC Raw bytes (in form of CECFrame) are send/receive to/from IARM Bus. This pseudo CEC Driver implemented on IARM Bus is called CEC IARM Adapter in the diagram.

Note

CECDevMgr binary is not currently being copied to the box as it is not being used in box.