Technical Product Specification

Intel® Local Control Panel for EPSD Platforms TPS Firmware Functional Specification

Revision 1.0 Intel order number G83726-001

3. Firmware Functional Specification

3.1 Overview

LCD (Local Control Display) is a one line character display that resides on the front panel of a

chassis. It can display maximum of 16 characters at a time. However, a few special characters

such as {, }, `, ~, and ^ are not available in the current LCD controller supported set of

characters. So these characters are mapped to their nearest lookalike characters of LCD. This

device also contains three buttons (Left, Right, and Enter). The user can select the contents that

need to be displayed on the LCD screen by operating these buttons. The BMC firmware drives

the display of this LCD panel based on the user’s selection. These three buttons are connected

to the GPIO pins of the BMC and the LCD controller is connected to the BMC using I

C bus.

3.2 LCD Functionality

The LCD device provides the following features:

 Displays a banner when the system is healthy. The default banner is the Server Name.

One exception is when a user sets a custom string using the command, “Write LCD

Custom String (0xB3)”, the set custom string will become the banner automatically, until

the user changes the banner option in the banner configuration menu.

 Displays active error messages when the system is not healthy.

 Provides the ability to quickly see asset information on system without having to open

the chassis.

 Provides basic server management configuration.

The LCD display is menu driven. Based on the user’s selection, respective menu items are

displayed. As soon as the system gets power, the LCD panel shall try to display the fault

detected in the system. If more than one fault exists, it displays the latest high severity fault

(event). If there are no faults, a banner is displayed. Default banner is Server Name. Server

Name is the value specified as the product name in the product FRU information in the main

board BMC FRU. User can set any of the parameters given under the banner configuration

menu as a banner string, which will be discussed later in this section. When the system’s status

is degraded, the corresponding active event will be displayed in place of the banner. During an

error, background color will be light amber in color. The LCD panel returns to a light green or

blue background when there are no longer any degraded, non-fatal, or fatal events active. The

LCD panel shall operate in lock-step with the system status LED. For example, if the system is

operating normally and an event occurs that results in the system status LED to blink green,

then the LCD shall display the degraded event that triggered the systems status LED to blink.

Figure 8: Background color during normal scenario

Figure 9: Background color during error

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