Sonic Alert 2.8 user manual Configuration Notes, Display configuration, HP Svga

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7Configuration Notes

7.1Display configuration

The Neon￿R supports a variety of LCD panels. The following section de- scribes the process of configuring the board for a known, currently supported display panel as well as a Das U-Boot utility command for testing settings on a new panel.

If you know the type of panel at compile time, you can place a selection from the list below in the Das U-Boot configuration file include/configs/neon.h. The CONFIG EXTRA ENV SETTINGS macro is used to define a compile-time choice. If you are using EEPROM to store environment settings, these can

be saved in the environment as well as described below.

Name				Resolution	Description
qvga	portrait			240 x 320	Hitachi Quarter VGA 3.5” panel
hitachi			qvga	320 x 240	Hitachi High-Brightness Quarter VGA
sharp		qvga		320 x 240	Sharp Quarter VGA
hitachi			hvga	640 x 240	Hitachi Half VGA
sharp		vga		640 x 480	Sharp 10.4 inch VGA
hitachi			wvga	800 x 480	Hitachi Half VGA
crt1024x768				1024 x 768	HP SVGA

For example:

#define CONFIG_EXTRA_ENV_SETTINGS "panel=hitachi_hvga" "\0"

Note that this is automatically done as a part of the make neon config step.

The boot loader settings for the LCD panel will carry through to the Linux and Windows CE drivers.

If you’re using the Neon￿R with a new panel, you’ll need to determine and define the following fields for the panel.

December 28, 2005 Revision 2.8