Ever here of Device tree? You have to disable the onboard HDMI framer to use the pins for your LCD.
http://circuitco.com/support/index.php?title=BeagleBone_Black_FAQ Gerald On Mon, Sep 30, 2013 at 11:35 AM, <[email protected]> wrote: > Beaglebone black. Right now, I am building the circuit to power and > connect my LCD, backlight and touch interface. My LCD has 24 pins for the > data. I think I'll just connect 16 for now and try to modify a dts of an > existing lcd cape. About the touch interface, how do I let the kernel load > my driver? > > > On Monday, September 30, 2013 11:30:08 PM UTC+8, Gerald wrote: > >> Which BeagleBone do you have? >> >> Gerald >> >> >> >> On Mon, Sep 30, 2013 at 9:56 AM, <[email protected]> wrote: >> >>> Thank you Gerald. I'm reading about device tree because I'm using the >>> 3.8 version of the linux kernel. I'm going to make my LCD as my main >>> display. It has capacitive touch panel. The touch has an I2C interface and >>> uses FT5x02 driver( I have the C source for this). I think I can understand >>> how to make a dts base on the existing dts in the kernel source. However, I >>> am still on the process of learning it. >>> >>> >>> On Saturday, September 14, 2013 12:00:37 AM UTC+8, Gerald wrote: >>> >>>> The 24 bit is standard on all 24 bit displays. There are also 8 bit >>>> displays as well. And 16 bit displays. The BBB is setup for 16 bit >>>> displays, but you can still use the 24b display. >>>> >>>> As to whether it will work, a lot of displays can work. You nee dto get >>>> help form some one that knows the AM3359 processor. >>>> >>>> There are several references for LCD that can be found by looking at >>>> the schematics for the LCDs that are already on the market, built, and >>>> ready to go. >>>> >>>> http://circuitco.com/support/**i**ndex.php?title=BeagleBone_**Cape**s<http://circuitco.com/support/index.php?title=BeagleBone_Capes>has >>>> a few isted and there others out there as well. >>>> >>>> Gerald >>>> >>>> >>>> >>>> On Fri, Sep 13, 2013 at 10:55 AM, <[email protected]> wrote: >>>> >>>>> Hi everyone! >>>>> >>>>> I want to connect an LCD for primary display to my beaglebone black. I >>>>> have not yet purchased an LCD because I am still on the process of >>>>> choosing >>>>> which LCD works. I don't have a background on writing drivers and >>>>> patching, >>>>> but I can program and have experienced compiling a linux kernel for an amd >>>>> geode singleboard computer in the past. >>>>> >>>>> After searching the net about LCDs and beaglebone, I learned about the >>>>> builtin LCD support of the AM335x processor. So now I looked for LCDs with >>>>> similar interface and I came across this: https://www.google.com/**u** >>>>> rl?sa=t&rct=j&q=&esrc=s&**source**=web&cd=1&ved=0CCwQFjAA&**url=** >>>>> http%3A%2F%2Fwww.fannal.**com%**2Fsupport%2Fdocument-**download%** >>>>> 2Fitem%2Fdownload%**2F13_**f59fd95**29e0ce870e8347832c9f482**2a.** >>>>> html&ei=**7DAzUvb0FYe4iAfF7IGQBw**&usg=**AFQjCNHINBIAaYblpZ1cBXIqX** >>>>> U0qyK**T6ZQ&sig2=**s5nJqjlkH14jVrCn-**oalqw&bvm=bv.**52164340,d.aGc&** >>>>> cad=rja<https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCwQFjAA&url=http%3A%2F%2Fwww.fannal.com%2Fsupport%2Fdocument-download%2Fitem%2Fdownload%2F13_f59fd9529e0ce870e8347832c9f4822a.html&ei=7DAzUvb0FYe4iAfF7IGQBw&usg=AFQjCNHINBIAaYblpZ1cBXIqXU0qyKT6ZQ&sig2=s5nJqjlkH14jVrCn-oalqw&bvm=bv.52164340,d.aGc&cad=rja> >>>>> >>>>> It has 24-bit TTL interface. So my questions are: >>>>> 1. Is the 24-bit TTL RGB interface stadard? That is, I can just >>>>> connect this to the beaglebone with at most editing the pinmux >>>>> 2. How do I know if an LCD is compatible with the AM335x processor? >>>>> 3. According to the supplier the touch controller is SSD2532. What >>>>> are the things do I need to do, to make the touch interface work? Do I >>>>> have >>>>> to make my own driver to interpret touch data from the I2C communication? >>>>> >>>>> I am looking forward for your responses. >>>>> >>>>> Thank you very much. >>>>> >>>>> Sincerely, >>>>> kit >>>>> >>>>> >>>>> 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_**Controlle****r_Driver%27s_Guide<http://processors.wiki.ti.com/index.php/AM335x_LCD_Controller_Driver%27s_Guide>that >>>>>> 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 beagleboard...@**googlegroups.**com. >>>>> >>>>> For more options, visit >>>>> https://groups.google.com/**grou**ps/opt_out<https://groups.google.com/groups/opt_out> >>>>> . >>>>> >>>> >>>> -- >>> 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 beagleboard...@**googlegroups.com. >>> For more options, visit >>> https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out> >>> . >>> >> >> -- > 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. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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