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/**index.php?title=BeagleBone_**Capes<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/** >>> 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_**f59fd9529e0ce870e8347832c9f482** >>> 2a.html&ei=**7DAzUvb0FYe4iAfF7IGQBw&usg=**AFQjCNHINBIAaYblpZ1cBXIqXU0qyK >>> **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/**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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