Checking The Connected Devices; Displaying Cec Send/Receive Information On The Lcd; Figure 19. Physical And Logical Addresses Display; Figure 20. Cec Menu - ST STM32F100 Series Application Note

Value line evaluation board CEC demonstration

Figure 19. Physical and logical addresses display

4.5

Checking the connected devices

Before displaying the available follower addresses, the CEC device checks the connected
devices by sending a <Polling Message> to all logical addresses. If the <Polling Message>
is acknowledged, then the device retains that address. After that step, only the addresses of
the connected devices are displayed.
If no device is connected, only the broadcast address is available.
If a new device is connected after the connected device check step, its address is
automatically added to the list of available addresses.
4.6

Displaying CEC send/receive information on the LCD

The LCD screen is divided into two parts as shown in
●
a subscreen that shows the CEC receive information: receive status, sender address
●
a subscreen used to select the follower address and the command to send

Figure 20. CEC menu

30/36 Doc ID 16896 Rev 2
Figure 20: CEC menu:
AN3127