From: Philip B. <ph...@ba...> - 2011-09-08 19:59:16
|
On 09/08/2011 03:47 PM, Steve Sakoman wrote: > On Thu, Sep 8, 2011 at 12:01 PM, bkpdeveloper<bkp...@gm...> wrote: >> Thanks Steve for the link. >> >> Software wise my code is almost identical to what you have going on. (I'm >> reading instead of writing). >> >> I want to verify that out of the box those additional serial ports are >> enabled. Could I possibly missing something there? If the answer is yes, >> I'll probably need to take a closer look at the hardware sending the data. I think you need to use ttyOX and not ttySX to access the ports coming from the Overo. Philip > > Well, I can only speak with certainty for the software images on my > site. In those all 3 serial ports are enabled. Of course 2 of the 3 > are already utilized (as described in my article) so the first serial > port is really the only option. > > I'm pretty sure that upstream u-boot and linux also enable all 3 > ports, so it is pretty likely that you should look at your hardware > first! Are you sure you haven't swapped TX and RX connections? I'd > guess that 99% of serial issues are due to reversed connections :-) > I'd also check your level conversion to make sure voltage levels are > correct too. > > Steve > >> Thanks for any info. >> >> On Wed, Aug 31, 2011 at 2:03 PM, Steve Sakoman<sa...@gm...> wrote: >>> >>> On Tue, Aug 30, 2011 at 8:51 AM, Bianca Prince<bkp...@gm...> >>> wrote: >>>> I'm attempting to communicate with a piece of hardware via the ttyS0 >>>> serial >>>> port - using the Tobi Board 9/10 pins. I'm attempting to interface with >>>> the >>>> hardware as a simple serial port connection. So far I've had no luck >>>> being >>>> able read across this connection. >>>> >>>> Right now I'm keeping the software portion very simple just to see if I >>>> can >>>> get something working it's simply using the termios api to open the >>>> connection set the attributes and attempting to read from it. >>>> >>>> Are there additional things that need to be done to enable this port? >>>> Am I >>>> missing something in the hardware portion that's required for this to >>>> function properly. Driver? >>>> >>>> Any information is appreciated? >>> >>> Take a look at this example of using one of the serial ports to talk >>> to a 7 segment display: >>> >>> >>> http://www.sakoman.com/OMAP/how-to-add-a-serial-7-segment-display-to-overo.html >>> >>> It is output only, but will give you a general overview of how to approach >>> this. >>> >>> Steve >>> >>> >>> ------------------------------------------------------------------------------ >>> Special Offer -- Download ArcSight Logger for FREE! >>> Finally, a world-class log management solution at an even better >>> price-free! And you'll get a free "Love Thy Logs" t-shirt when you >>> download Logger. Secure your free ArcSight Logger TODAY! >>> http://p.sf.net/sfu/arcsisghtdev2dev >>> _______________________________________________ >>> gumstix-users mailing list >>> gum...@li... >>> https://lists.sourceforge.net/lists/listinfo/gumstix-users >> >> >> ------------------------------------------------------------------------------ >> Doing More with Less: The Next Generation Virtual Desktop >> What are the key obstacles that have prevented many mid-market businesses >> from deploying virtual desktops? How do next-generation virtual desktops >> provide companies an easier-to-deploy, easier-to-manage and more affordable >> virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/ >> _______________________________________________ >> gumstix-users mailing list >> gum...@li... >> https://lists.sourceforge.net/lists/listinfo/gumstix-users >> >> > > ------------------------------------------------------------------------------ > Doing More with Less: The Next Generation Virtual Desktop > What are the key obstacles that have prevented many mid-market businesses > from deploying virtual desktops? How do next-generation virtual desktops > provide companies an easier-to-deploy, easier-to-manage and more affordable > virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |