From: Fabio M. <fab...@gm...> - 2007-05-13 23:36:30
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Hey Chris, Yeah, I had heard about the PSP screen, I just thought it would be a while, and I am the kind of guy that needs to get started when the idea hits me... I have already thought about getting the verdex and console, I am just unsure of what to do with it. Is there a collection of gumstix projects with some details somewhere? Just can't really think about something to do with the board and without a screen to "see" Linux... Thanks, On 5/13/07, Chris Dollar <chr...@gm...> wrote: > > Hi Fabio, > > > I assume you are using the GPSStix? > Yep. > > > How happy with it are you? > Very happy... I've not been around a lot of gps units, but I'm really > impressed with the performance of the ublox on the gpsstix. > > >I read the > > research papers the Austrian company wrote on how well it works in > closed > > environments. My use is not in a closed environment, but that's still > nice > > to know. > I've not had mine in a car yet, but here at home with an active > antenna and 9' cable inside an east facing window its not unusual for > me to have a lock on 10 satellites. The first fix takes a while, but > once you have that I've found it hard to lose the fix in my house. > > > > > The GPS in my car seems to update very fast, around 3-4 times per > second. I > > don't know if they are just interpolating the last heading/speed, or if > it > > is actually updating position that quickly. Do you know how often the > > GPSStix updates its position? > No, although if you follow the links in the wiki and nab the ublox > datasheet I'm sure you can find that info there. > > > > > So a framebuffer driver needs to be added to the gumstix kernel? Sorry, > I > > don't quite understand that part. > If you get an ALPS display like mine its a simple matter of selecting > an option in the kernel config menu. For other lcds you would need to > know its timing info (found in the datasheet) so you can pass the > right options to the framebuffer driver as boot-time parameters. If > you search the archives you can find lots of examples of framebuffer > driver params for various lcds that have been connected to gumsitxes > in the past. > > > > > I am ready to buy, but I am holding back, affraid I will not be able to > > handle the hardware once it arrives, to be honest. Hard to admit that, > but > > it's true. > Gumstix is planning a GSMStix board that will include all the features > on the current GPSStix (with some upgrades) as well as GSM support, > all on a pcb designed to connect to a sony PSP lcd. If in doubt about > the hardware, I'd just get a verdex motherboard and console-vx board > so you can start getting familiar with linux and gumstix, and then get > the GSMStix and PSP combo once it becomes available - then you don't > have to worry about the hardware and by then the framebuffer stuff > will most likely just be a menu option for the kernel. > > > > Thanks again, nice to get help! > > No problem! > > Chris > > > > > > On 5/13/07, Chris Dollar <chr...@gm...> wrote: > > > > > > Hi Fabio, > > > > > > On 5/13/07, Fabio Miguez <fab...@gm... > wrote: > > > > Hey Chris, > > > > > > > > The only thing I found at HSC was this > > > > > > > http://www.halted.com/commerce/ccp21599-lcd-display-320x240-3224-h3130-80815.htm > > > > but there are no specs, even though it seems to be a 320x240 LCD. > > > > > > > I'd stay away from anything you can't get a datasheet for.. > > > > > > > I looked on ebay but did not find any of them. There were other > ALPS > > > > screens and inverters, but nothing similar to this. Is ALPS the > brand? > > > > > > > Yes, the brand is ALPS. > > > > I am a complete newbie on Linux, embedded computers, and electronics > in > > > > general, including LCDs, although I have lots of experience in > Windows, > > C++, > > > > and C#, but as of late I have been struggling to understand how to > use a > > > > screen with gumstix. > > > > > > > > From what I have understood, the PXA270 has an LCD controller with a > > frame > > > > buffer available, so I could even use OpenGL in software > acceleration > > mode, > > > > and I think I need an LCD screen and its inverter before I can > connect > > to an > > > > Audiostix or GPSStix, but that connection is a mystery to me, I > don't > > know > > > > if it is as simple as hooking up the wires, or whatever else. > > > > > > > Actually, it is almost as simple as hooking up the wires. You'll have > > > 8-16 lcd data lines to connect, and a few clock lines and others like > > > a gpio for turning the display on/off. The only other thing is > > > setting up the framebuffer driver with the right settings for your lcd > > > (which is why you really need a datasheet, or at least the settings > > > from someone else who has that particular lcd model working). > > > > What is your application for gumstix? > > > > > > > Basically its a graphical gps program. It hooks into gpsd and every > > > time an update comes from the gps a map is generated (from an open > > > source program called tmrs) and displayed with some other position > > > information. Thats why refresh rate isn't much of a concern. > > > > Thanks, > > > > > > > Sure thing, > > > > > > Chris > > > > > > > > On 5/13/07, Chris Dollar <chr...@gm... > wrote: > > > > > > > > > > Hi Fabio, > > > > > > > > > > I bought 2 of those displays from HSC Electronics ( halted.com) > about > > 2 > > > > > years ago. I don't think they carry them anymore, but I have seen > > > > > them recently on ebay going for ~$10US. I've had really good > success > > > > > with the display, but I don't really know how good the refresh > rate is > > > > > - with my project I'm only redrawing to the framebuffer 2-4 times > per > > > > > second, which it handles really well. > > > > > > > > > > All-in-all I think its a pretty nice display. > > > > > > > > > > Chris > > > > > > > > > > > > > > > On 5/13/07, Fabio Miguez < fab...@gm...> wrote: > > > > > > Hi Chris, > > > > > > > > > > > > I was wondering where you got this screen, I have been searching > for > > > > some > > > > > > time now (about 2 hours) via Google, Earth LCD, and have not > find > > > > anything. > > > > > > Am I just not looking in the right place, or they are really > hard to > > > > find? > > > > > > > > > > > > Also, how happy are you with that screen? Is the refresh rate > > decent? > > > > > > > > > > > > Thanks, > > > > > > > > > > > > > > > > > > On 5/12/07, Chris Dollar < chr...@gm...> wrote: > > > > > > > I'm using the ALPS LFH8P4032B which includes an integrated > 4wire > > > > > > > resistive touch screen (datasheet here > > > > > > > > > > > > > > > > > > > http://hubbard.engr.scu.edu/embedded/lcd/lfh8p4032b/lfh8p4032b.html > > > > > > ). > > > > > > > > > > > > > > Here are the connections: > > > > > > > ALPS --- Audiostix2 > > > > > > > Y-Up --- Y+ > > > > > > > X-Lft --- X+ > > > > > > > Y-Dn --- Y- > > > > > > > X-Rt --- X- > > > > > > > > > > > > > > You should check out the UCB1400 datasheet for more info on > its > > > > > > > touchscreen controller, but afaik it only works with 4wire > > resistive > > > > > > > type touchscreens. > > > > > > > > > > > > > > Chris > > > > > > > > > > > > > > On 5/11/07, Jayesh Salvi < jay...@gm...> wrote: > > > > > > > > That would be helpful too. Somewhere I read the advise to > use > > 4-wire > > > > > > > > resistive touch screens with UCB1400. Does it not support > other > > > > forms of > > > > > > > > touch screens (5-wire resistive or transmitive/capacitive > for > > that > > > > > > matter)? > > > > > > > > > > > > > > > > Jayesh > > > > > > > > > > > > > > > > > > > > > > > > On 5/11/07, Jeff Sadowski < jef...@gm...> wrote: > > > > > > > > > this is all the software side could you give the model of > > > > touchscreen > > > > > > > > > and wireing reference also? thanks :-) > > > > > > > > > > > > > > > > > > On 5/11/07, Jayesh Salvi < jay...@gm...> wrote: > > > > > > > > > > Thanks Chris! Useful info. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On 5/10/07, Chris Dollar < chr...@gm...> > wrote: > > > > > > > > > > > Just got the touchscreen working with my lcd on the > > regular > > > > > > > > > > > basix/connex buildroot. I put together this wiki page > > > > detailing > > > > > > how > > > > > > > > > > > to do it at > > > > > > http://docwiki.gumstix.org/Touchscreen > > > > > > > > > > > > > > > > > > > > > > There is a patch that has to be applied to the kernel > (and > > one > > > > > > that > > > > > > > > > > > has to be removed), but it only applies to the 2.6.20 > > kernel > > > > as it > > > > > > is > > > > > > > > > > > fixed in 21. Other than that the build is pretty > easy. > > The > > > > part > > > > > > that > > > > > > > > > > > got me was the ucb1400 interrupt back to the pxa - no > > matter > > > > what > > > > > > I > > > > > > > > > > > would do the pxa wouldn't get the interrupt and the > > > > touchscreen > > > > > > driver > > > > > > > > > > > would hang. As is turns out, the IRQOUT pin on the > > ucb1400 is > > > > > > > > > > > connected to PWM0, aka GPIO 16, on the gumstix, which > I > > was > > > > using > > > > > > to > > > > > > > > > > > set my lcd contrast. Moving the lcd contrast to PWM1 > to > > allow > > > > > > PWM0 to > > > > > > > > > > > function as the ucb1400 input pin got it all working. > > Moral > > > > of > > > > > > the > > > > > > > > > > > story is: if you are using PWM0 for something else, > the > > > > > > touchscreen > > > > > > > > > > > driver won't work. > > > > > > > > > > > > > > > > > > > > > > Chris > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > > > > > > > This SF.net email is sponsored by DB2 Express > > > > > > > > > > > Download DB2 Express C - the FREE version of DB2 > express > > and > > > > take > > > > > > > > > > > control of your XML. No limits. Just data. Click to > get it > > > > now. > > > > > > > > > > > http://sourceforge.net/powerbar/db2/ > > > > > > > > > > > > > > > _______________________________________________ > > > > > > > > > > > gumstix-users mailing list > > > > > > > > > > > gum...@li... > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > > > > > > This SF.net email is sponsored by DB2 Express > > > > > > > > > > Download DB2 Express C - the FREE version of DB2 express > and > > > > take > > > > > > > > > > control of your XML. No limits. Just data. Click to get > it > > now. > > > > > > > > > > http://sourceforge.net/powerbar/db2/ > > > > > > > > > > > > _______________________________________________ > > > > > > > > > > gumstix-users mailing list > > > > > > > > > > gum...@li... > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > > > > > This SF.net email is sponsored by DB2 Express > > > > > > > > > Download DB2 Express C - the FREE version of DB2 express > and > > take > > > > > > > > > control of your XML. No limits. Just data. Click to get it > > now. > > > > > > > > > http://sourceforge.net/powerbar/db2/ > > > > > > > > > > > _______________________________________________ > > > > > > > > > gumstix-users mailing list > > > > > > > > > gum...@li... > > > > > > > > > > > > > > > > > > > > > > > > > > > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > > > > This SF.net email is sponsored by DB2 Express > > > > > > > > Download DB2 Express C - the FREE version of DB2 express and > > take > > > > > > > > control of your XML. No limits. Just data. Click to get it > now. > > > > > > > > http://sourceforge.net/powerbar/db2/ > > > > > > > > _______________________________________________ > > > > > > > > gumstix-users mailing list > > > > > > > > gum...@li... > > > > > > > > > > > > > > > > > > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > > > This SF.net email is sponsored by DB2 Express > > > > > > > Download DB2 Express C - the FREE version of DB2 express and > take > > > > > > > control of your XML. No limits. Just data. Click to get it > now. > > > > > > > http://sourceforge.net/powerbar/db2/ > > > > > > > _______________________________________________ > > > > > > > gumstix-users mailing list > > > > > > > gum...@li... > > > > > > > > > > > > > > > > > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > Fabio Miguez > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > > This SF.net email is sponsored by DB2 Express > > > > > > Download DB2 Express C - the FREE version of DB2 express and > take > > > > > > control of your XML. No limits. Just data. Click to get it now. > > > > > > http://sourceforge.net/powerbar/db2/ > > > > > > _______________________________________________ > > > > > > gumstix-users mailing list > > > > > > gum...@li... > > > > > > > > > > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > This SF.net email is sponsored by DB2 Express > > > > > Download DB2 Express C - the FREE version of DB2 express and take > > > > > control of your XML. No limits. Just data. Click to get it now. > > > > > http://sourceforge.net/powerbar/db2/ > > > > > _______________________________________________ > > > > > gumstix-users mailing list > > > > > gum...@li... > > > > > > > > > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > > > > > > > > > > > > > > -- > > > > Fabio Miguez > > > > > > > ------------------------------------------------------------------------- > > > > This SF.net email is sponsored by DB2 Express > > > > Download DB2 Express C - the FREE version of DB2 express and take > > > > control of your XML. No limits. Just data. Click to get it now. > > > > http://sourceforge.net/powerbar/db2/ > > > > _______________________________________________ > > > > gumstix-users mailing list > > > > gum...@li... > > > > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > This SF.net email is sponsored by DB2 Express > > > Download DB2 Express C - the FREE version of DB2 express and take > > > control of your XML. No limits. Just data. Click to get it now. > > > http://sourceforge.net/powerbar/db2/ > > > _______________________________________________ > > > gumstix-users mailing list > > > gum...@li... > > > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > > > > -- > > Fabio Miguez > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by DB2 Express > > Download DB2 Express C - the FREE version of DB2 express and take > > control of your XML. No limits. Just data. Click to get it now. > > http://sourceforge.net/powerbar/db2/ > > _______________________________________________ > > gumstix-users mailing list > > gum...@li... > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > -- Fabio Miguez |