We did this for a reason. Our focus was expansion and due to the pin muxing, the extra 8 bits would wipe out a lot of functionality. Se we decided to make those easily accessible when connected to a monitor.
Gerald On Tue, Nov 12, 2013 at 10:27 AM, <[email protected]> wrote: > Thanks Gerald, > > I will have to confirm this by wiring up another LCD panel to the > expansion headers. It's unfortunate to learn that there is a 16-bit color > limitation via HDMI output. On the Raspberry Pi I can issue the "fbset > -depth 24" bash command and the HDMI output switches to 24-bit color depth. > When I try that command on the BBB it returns with the error "ioctl > FBIOPUT_VSCREENINFO: Invalid argument". Only 8 and 16 work as valid bit > depths with the BBB. > > > On Tuesday, November 12, 2013 9:41:30 AM UTC-5, Gerald wrote: > >> All 24 bits are available on the expansion headers. I cannot speak for 4D >> systems as to how their board is designed and if they support 24b mode or >> not. >> >> HDMI only has 16 bits connected, so you cannot get 24b color on it. >> >> Gerald >> >> >> >> On Tue, Nov 12, 2013 at 8:37 AM, <[email protected]> wrote: >> >>> I'd like to refine my question to you Gerald... >>> >>> How can I get 24-bit color with the BBB via either HDMI or LCD (assuming >>> the LCD I wire up is a 24/32-bit color panel)? I thought the TI spec >>> indicated the BBB could drive true-color but all I can manage to get out of >>> the BBB is 16-bit color regardless if I use HDMI or the LCD from 4D Systems. >>> >>> >>> On Monday, November 11, 2013 2:26:02 PM UTC-5, [email protected] wrote: >>>> >>>> Great, now how does one specify a particular resolution and audio >>>> option upon startup? >>>> >>>> On Saturday, November 2, 2013 4:32:32 PM UTC-4, Gerald wrote: >>>>> >>>>> 1920x1080@24HZ is the best it can do. >>>>> >>>>> Gerald >>>>> >>>>> >>>>> >>>>> On Sat, Nov 2, 2013 at 1:19 PM, <[email protected]> wrote: >>>>> >>>>>> Per above, it seemed that 1920x1080 was possible in the 50-60Hz range >>>>>> without audio. Has the community been able to figure out a way to get >>>>>> that >>>>>> to work? >>>>>> Thanks! >>>>>> >>>>>> >>>>>> On Friday, November 1, 2013 3:24:35 AM UTC-4, [email protected]: >>>>>>> >>>>>>> People, read your docs… According to the latest System Reference >>>>>>> Manual, BBB added support for 1920x1080@24Hz resolution: >>>>>>> https://github.com/CircuitCo/BeagleBone-Black/tr >>>>>>> ee/master/BBB_SRM.pdf<https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&ved=0CFwQFjAD&url=https%3A%2F%2Fgithub.com%2FCircuitCo%2FBeagleBone-Black%2Fblob%2Fmaster%2FBBB_SRM.pdf%3Fraw%3Dtrue&ei=NVVzUrLINaO62AWi9oCgBA&usg=AFQjCNGHgKSW6eN6wCnTOUguqfvWLjtP8Q&sig2=b12eANaFMCe-U0hiVGZLpw&bvm=bv.55819444,d.b2I> >>>>>>> >>>>>>> >>>>>>> 6.10 HDMI Interface >>>>>>> >>>>>>> The BeagleBone Black has an onboard HDMI framer that converts the >>>>>>> LCD signals and audio signals to drive a HDMI monitor. The design uses >>>>>>> an >>>>>>> NXP TDA19988 HDMI Framer. >>>>>>> >>>>>>> The following sections provide more detail into the design of this >>>>>>> interface. >>>>>>> >>>>>>> 6.10.1 Supported Resolutions >>>>>>> >>>>>>> The maximum resolution supported by the BeagleBone Black is >>>>>>> 1280x1024 @ 60Hz. Table 9 below shows the supported resolutions. >>>>>>> Not all resolutions may work on all monitors, but these have been tested >>>>>>> and shown to work on at least one monitor. EDID is supported on the >>>>>>> BeagleBone Black. Based on the EDID reading from the connected monitor, >>>>>>> the >>>>>>> highest compatible resolution is selected. >>>>>>> >>>>>>> Table 9. HDMI Supported Monitor Resolutions >>>>>>> [image: page71image9400] [image: page71image9824] [image: >>>>>>> page71image10248] [image: page71image11640] >>>>>>> >>>>>>> RESOLUTION >>>>>>> [image: page71image12800] [image: page71image13416] [image: >>>>>>> page71image13576] >>>>>>> >>>>>>> AUDIO >>>>>>> [image: page71image14600] [image: page71image14760] [image: >>>>>>> page71image15352] [image: page71image15920] [image: >>>>>>> page71image16344] >>>>>>> >>>>>>> 800 x 600 @60Hz >>>>>>> >>>>>>> 800 x 600 @56Hz >>>>>>> [image: page71image20208] >>>>>>> >>>>>>> 640 x 480 @75Hz >>>>>>> [image: page71image23392] [image: page71image24296] >>>>>>> >>>>>>> 640 x 480 @60Hz >>>>>>> >>>>>>> YES >>>>>>> >>>>>>> 720 x 400 @70Hz >>>>>>> [image: page71image29160] >>>>>>> >>>>>>> 1280 x 1024 @75Hz >>>>>>> [image: page71image32416] [image: page71image33184] >>>>>>> >>>>>>> 1024 x 768 @75Hz >>>>>>> [image: page71image35248] [image: page71image36016] >>>>>>> >>>>>>> 1024 x 768 @70Hz >>>>>>> [image: page71image38080] [image: page71image38848] >>>>>>> >>>>>>> 1024 x 768 @60Hz >>>>>>> [image: page71image41264] [image: page71image41744] [image: >>>>>>> page71image42632] >>>>>>> >>>>>>> 800 x 600 @75Hz >>>>>>> [image: page71image44912] >>>>>>> >>>>>>> 800 x 600 @72Hz >>>>>>> >>>>>>> 720 x 480 @60Hz >>>>>>> >>>>>>> YES >>>>>>> >>>>>>> 1280 x 720 @60Hz >>>>>>> >>>>>>> YES >>>>>>> [image: page71image53920] >>>>>>> >>>>>>> 1920x1080@24Hz >>>>>>> >>>>>>> YES >>>>>>> [image: page71image57840] [image: page71image58304] [image: >>>>>>> page71image58784] >>>>>>> >>>>>>> *NOTE: The updated software image used on the Rev A5B board added >>>>>>> support for 1920x1080@24HZ.* >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Wednesday, 8 May 2013 03:05:24 UTC-7, [email protected]: >>>>>>>> >>>>>>>> The Beagle Board Black system reference manual rev A5.2 says (in >>>>>>>> the HDMI section): >>>>>>>> >>>>>>>> Currently the following resolutions are supported via the software: >>>>>>>> 1280 x 1024 >>>>>>>> 1440 x 900 >>>>>>>> 1024 x 768 >>>>>>>> 1280 x 720 >>>>>>>> >>>>>>>> This is a bit disappointing because we don't have 1920 x 1080... >>>>>>>> arguable "full HD". I believe the current Raspberry Pie has more than >>>>>>>> 1920 >>>>>>>> x 1080. >>>>>>>> Is this limit imposed by the hardware of the software? Are we >>>>>>>> expecting higher resolutions in future software releases? >>>>>>>> >>>>>>>> Thnaks >>>>>>>> >>>>>>>> Richard. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>> 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. >>> 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. > 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. 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.
