Framebuffer support =================== Framebuffer splash screen ------------------------- barebox supports BMP and PNG graphics using the :ref:`command_splash` command. Since barebox has nothing useful to show on the framebuffer it doesn't enable it during startup. A framebuffer can be enabled with the ``enable`` parameter of the framebuffer device: .. code-block:: sh fb0.enable=1 Some framebuffer devices support different resolutions. These can be configured with the ``mode_name`` parameter. See a list of supported modes using ``devinfo fb0``. A mode can only be changed when the framebuffer is disabled. A typical script to enable the framebuffer could look like this: .. code-block:: sh #!/bin/sh SPLASH=/path/to/mysplash.png if [ ! -f $SPLASH ]; then exit 0 fi # first show splash splash /path/to/mysplash.png # enable framebuffer fb0.enable=1 # wait for signals to become stable msleep 100 # finally enable backlight manually if no driver exists gpio_direction_output 42 1 Framebuffer console ------------------- barebox has framebuffer console support which can be enabled with CONFIG_FRAMEBUFFER_CONSOLE. When registered each framebuffer device gets a corresponding fbconsole device. The console can be activated with ``fbconsolex.active=oe``. Depending on compile time options there are different fonts available. These can be selected with the fbconsolex.font variable. To get a list of fonts use ``devinfo fbconsolex``.