Revision as of 17:21, 2 May 2008

On this page you will find usefull informations to have a working Linux Framebuffer on your board.

Kernel configuration

Framebuffer is already configured (for Microtips LCD) in standard/default Armadeus kernel image

• launch Linux kernel configuration:

 [armadeus]$ make linux-menuconfig

• in "Char Devices" menu, activate "Virtual Terminal" and "Support for virtual terminal on console"
• activate Device drivers -> Graphic support -> Support for Framebuffer -> Motorola iMX LCD support and choose your LCD in LCD Panel
• "Console display driver support ->Frame buffer console

support" (deactivate VGA stuff & add some fonts), then choose 224 colour boot logo

• recompile the kernel:

[armadeus]$ make linux

• , now to have console on serial port, you will have to add "console=ttySMX0,115200n8" to your boot parameters
• reflash kernel image on your board and enjoy (you should see Linux logo on screen at startup)!

Userland

If you have devfs activated, framebuffer device can be accessed with /dev/fb/0. Otherwise, you will need to create the device node with

 # mknod c 29 0

You can activate some test tools from the armadeus build process:

 $ make menuconfig -> packages -> fbset

You have several test tools on yahoo groups to play a little with the framebuffer.

Links

• http://linux-fbdev.sourceforge.net/
• http://directfb.org/