Oh well, I got it working. I disconnected the PWM pin in the backlight controller an just left it pulled up. I now have a display. But it is a console. I though angstrom has gui. What angstrom should I flash my bbb to have the GUI? so that I can start with the touch screen now.
On Tuesday, May 1, 2012 8:34:50 AM UTC+8, KermM wrote: > > I've been playing around with my BeagleBone for a few weeks now, and I > figured it was time to try to connect an LCD to it. After a fair bit of > digging, kernel-compile, and testing, I've decided that I might as well run > my questions by the experts to see if you guys can shed some light. First > of all, what I know and what I've tried: > > - I have a 320x240 RGB LCD (with SPI touchscreen) that has either an > HX8347-A or SSD1289 compatible display driver. > - The AM335x has an LCDC that supports Raster and LIDD modes. Based on the > pinout of the display (D0-D15, CS, RS [aka CD], WR, RD, RESET), I believe > it requires LIDD mode > - From the 5000-page AM335x manual, I found the proper pin mappings and > got my display all hooked up. > - I looked for and found a /drivers/video/ssd1289 module for another > platform that I could theoretically port > - I found via > http://processors.wiki.ti.com/index.php/AM335x_LCD_Controller_Driver%27s_Guidethat > I should look at the da8xx module for the am335x as a start > - I downloaded and built the Angstrom source kernel and root image via > Angstrom's git repository. I also tried the Angstrom Narcissus tool, but > had less success > - I managed to build Angstrom successfully, and I managed to perform a > menuconfig that confirmed that the da8xx driver was configured. I tried as > built-in and as a module > - In neither case, performing a console-image build, could I manage to > actually get anything related to the da8xx to appear in the kernel or as a > module. Perhaps I need a GUIfied image? > - Unfortunately, trying to build a full GUI image with gnome and friends > failed due to bad XML in one of the gdm components > - I searched through the many files in the Angstrom bitbake directories, > and found such interesting items as patches for the Beagleboard Toys' ULCD7 > (which appears to use the Raster mode, not the LIDD mode) > - I tried copying over the kernel source directory from my cross-compiling > Linux machine to my Beaglebone itself, but ran into myriad problems trying > to build the da8xx module manually on the 'bone. > > At this point, I believe that my plan of attack should be something like > this: > - Get the da8xx driver to somehow build, anywhere > - Insmod it and see if I can use it to get anything to appear on my LCD > - If not, merge the SSD1289 module I found for another platform as a patch > / extension to the da8xx driver > - If and when I get it working as a driver, figure out how to compile it > directly into the kernel. > > Thanks in advance for any feedback, experience, or comments you might > have; please don't hesitate to ask any additional questions you might have > about what steps and approaches I have or have not yet tried. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
