Framebuffer

From ArmadeusWiki
Revision as of 21:56, 28 February 2008 by JulienB (Talk | contribs) (Armadeus Framebuffer documentation page !)

Jump to: navigation, search

Here is the procedure to have a working framebuffer on the board

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

  • configure the Linux kernel for Framebuffer support:
make menuconfig
  • in "Char Devices" menu, activate "Virtual Terminal" and "Support for virtual terminal on console"
  • in "Graphic support" activate "Support for Framebuffer", "Motorola iMX

LCD support" "Console display driver support ->Frame buffer console support" (deactivate VGA stuff & add some fonts), then choose 224 colour boot logo

  • recompile the kernel, 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)!

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.