From: John P. <pa...@be...> - 2007-03-14 03:22:06
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I have two stacks: 1. NetCF + connex-bt + breakout-gs 2. NetCF + connex + breakout-gs Both running same image (buildroot 1321) built with support for i2c, ds1307 RTC and kernel options Chris Dollar mentioned (2/23/2007 "Re: [Gumstix-users] CF card errors and the latest buildroot") to get CF flash memory card to work. Thanks Chris! The non-bt stack is able to see the RTC, udev creates /dev/rtc0 and all is well. The bt stack, however, gets a series of "i2c_pxa: timeout waiting for bus free" messages when booting before it gives up and finishes booting without the RTC. Any ideas? Thanks, John |
From: Dave H. <dhy...@gm...> - 2007-03-14 05:23:46
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Hi John, > The non-bt stack is able to see the RTC, udev creates /dev/rtc0 and all is > well. The bt stack, however, gets a series of "i2c_pxa: timeout waiting for > bus free" messages when booting before it gives up and finishes booting > without the RTC. Any ideas? Sound like a problem with the bus.. Did you add pullup resistors? Try running the i2c-test program I wrote for the robostix (it may still be useful without the robostix). You need to NOT load the i2c-dev or i2c-pxa modules. Then run the i2c-test program (found in projects/robostix/gumstix/i2c-test) It needs the same mmap fix that the gpio stuff needs. With the test running, SDA and SCL should both be 1. If you then ground them with a wire they should change to 0. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: John P. <pa...@be...> - 2007-03-15 02:15:48
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10K pullups did the trick. Thanks Dave. I thought I tried this, but looking back, what I thought were 10K were not... John > -----Original Message----- > From: gum...@li... > [mailto:gum...@li...] On > Behalf Of Dave Hylands > Sent: Wednesday, March 14, 2007 1:24 AM > To: General mailing list for gumstix users. > Subject: Re: [Gumstix-users] RTC Issue > > Hi John, > > > The non-bt stack is able to see the RTC, udev creates > /dev/rtc0 and all is > > well. The bt stack, however, gets a series of "i2c_pxa: > timeout waiting for > > bus free" messages when booting before it gives up and > finishes booting > > without the RTC. Any ideas? > > Sound like a problem with the bus.. Did you add pullup resistors? > > Try running the i2c-test program I wrote for the robostix (it may > still be useful without the robostix). > > You need to NOT load the i2c-dev or i2c-pxa modules. > > Then run the i2c-test program (found in > projects/robostix/gumstix/i2c-test) > > It needs the same mmap fix that the gpio stuff needs. > > With the test running, SDA and SCL should both be 1. If you then > ground them with a wire they should change to 0. > > -- > Dave Hylands > Vancouver, BC, Canada > http://www.DaveHylands.com/ > > -------------------------------------------------------------- > ----------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the > chance to share your > opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge > &CID=DEVDEV > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users |