From: Frank A. <ft...@ya...> - 2010-04-27 22:59:59
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I'm trying to enable the HDQ/1-wire functionality on an overo/summit combo. According to the gumstix docs, the HDQ_1WIRE is available on pin 19 of the summit 40 pin header. I've compiled the driver, omap_hdq.ko, for linux kernel 2.6.33 and have loaded the module. But a scope probe on pin 19 never shows any activity (the pin is always high). The file /proc/interrupts shows 0 interrupts for ompa_hdq. I found a thread in the owfs forum (http://www.mail-archive.com/owf...@li.../msg05609.html) that mirrors my problem exactly, but there was no resolution. Does there need to be any code added to the linux kernel file board-overo.c to enable the HDQ/1-wire functionality? frank |
From: Gerhard H. <Ger...@pe...> - 2010-06-25 07:30:04
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Frank, I also plan to start using the 1-wire interface on overo/tobi, just to connect a bunch of DS2431 EEPROM chips and read/write them within a java application. Frank, have you made any progress in the meantime? Has anybody else got to run the owfs on overo? thanks for any response in advance cheers Gerhard -- View this message in context: http://old.nabble.com/hdq-1wire-module-tp28383127p28989667.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: Søren S. C. <li...@ss...> - 2010-06-27 08:30:53
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Have you remembered to pinmux the ball in U-boot to HDQ/1 functionality? Søren --- SSC Solutions ApS - Denmark - www.ssc-solutions.dk |
From: Frank A. <ft...@ya...> - 2010-06-29 13:20:26
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On 6/27/2010 4:30 AM, Søren Steen Christensen wrote: > Have you remembered to pinmux the ball in U-boot to HDQ/1 functionality? > Søren Yes, the pin is set to mode 0, which is hdq_sio. > > --- > SSC Solutions ApS - Denmark - www.ssc-solutions.dk > > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first |
From: Frank A. <ft...@ya...> - 2010-06-28 14:44:46
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On 6/25/2010 3:29 AM, Gerhard H. wrote: > > Frank, > > I also plan to start using the 1-wire interface on overo/tobi, just to > connect a bunch of DS2431 EEPROM chips and read/write them within a java > application. > > Frank, have you made any progress in the meantime? Gerhard, No, I have not made any progress. I did not pursue using the 1-wire interface since I could not get the driver to function. frank |
From: Gerhard H. <Ger...@pe...> - 2010-06-29 14:19:35
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Frank Agius wrote: > > >> Frank, have you made any progress in the meantime? > > No, I have not made any progress. I did not pursue using the 1-wire > interface since I could not get the driver to function. > Frank, thanks for your answer. As my kernel knowledge is not good enough I will try to access the 1-wire bus over serial interface using the DS2480. I will keep you informed about my progress. It also has the advantage, that I do not need an additional level converter from 1,8 to 5V of may default bus voltage level cheers Gerhard -- View this message in context: http://old.nabble.com/hdq-1wire-module-tp28383127p29024160.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: Ors T. <lis...@gm...> - 2010-09-15 21:47:32
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Hi, Oops, that must have completely skipped my attention. Where does it say I have to do that? What is the default muxing for this pin? Sorry, I know I should look it up myself, and I surely will, but reading this (and the prospect of being able to move forward with this) got me excited. br, Ors On Sun, Jun 27, 2010 at 10:30 AM, Søren Steen Christensen < li...@ss...> wrote: > Have you remembered to pinmux the ball in U-boot to HDQ/1 functionality? > Søren > > --- > SSC Solutions ApS - Denmark - www.ssc-solutions.dk > > > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Søren S. C. <li...@ss...> - 2010-10-03 13:17:48
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Hi Ors, Hereby a delayed answer. > Where does it say I have to do that? Don't know - General OMAP knowledge :-) > What is the default muxing for this pin? GPIO_170 is default starting in safe-mode, but U-boot pr. default muxes it to GPIO-mode (M4): MUX_VAL(CP(HDQ_SIO), (IDIS | PTU | EN | M4)) /*HDQ_SIO*/\ More info about pin-muxing to be found at http://elinux.org/BeagleBoardPinMux and in the OMAP3 TRM (spruf98) and datasheet (omap3530.pdf) Best regards Good luck Søren --- SSC Solutions ApS - Denmark - www.ssc-solutions.dk |
From: Ors T. <lis...@gm...> - 2010-09-15 21:40:43
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Hi, Yes, that was me trying to get some life out of 1wire. I haven't given up completely on using the OMAP 1wire bus master, but for now I'm using a USB 1wire master (DS2490). Actually, one reason for suspending my efforts was that looking into the code of the bus master seemed to suggest that only HDQ mode, but not 1wire mode was implemented. This was quite some months ago and I forgot most of the details I had in my head at that time, but I seem to remember that parts of the driver that would be used for 1wide more ware not implemented, moreover, the driver was initializing the 1wire HW for HDQ mode with no option/configuration for 1wire. <disclaimer> All of the above could of course be wrong, me not being a programmer. </disclaimer> br, Ors On Wed, Apr 28, 2010 at 12:59 AM, Frank Agius <ft...@ya...> wrote: > I'm trying to enable the HDQ/1-wire functionality on an overo/summit > combo. According to the gumstix docs, the HDQ_1WIRE is available on > pin 19 of the summit 40 pin header. I've compiled the driver, > omap_hdq.ko, for linux kernel 2.6.33 and have loaded the module. But a > scope probe on pin 19 never shows any activity (the pin is always high). > The file /proc/interrupts shows 0 interrupts for ompa_hdq. I found a > thread in the owfs forum > ( > http://www.mail-archive.com/owf...@li.../msg05609.html > ) > that mirrors my problem exactly, but there was no resolution. Does > there need to be any code added to the linux kernel file board-overo.c > to enable the HDQ/1-wire functionality? > > frank > > > > ------------------------------------------------------------------------------ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Andrew K. (m. l. account) <ak...@mi...> - 2010-09-15 22:08:45
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On Wednesday, September 15, 2010 05:40:35 pm Ors Tiszay wrote: > Actually, one reason for suspending my efforts was that looking into the > code of the bus master seemed to suggest that only HDQ mode, but not 1wire > mode was implemented. This was quite some months ago and I forgot most of > the details I had in my head at that time, but I seem to remember that > parts of the driver that would be used for 1wide more ware not > implemented, moreover, the driver was initializing the 1wire HW for HDQ > mode with no option/configuration for 1wire. > > <disclaimer> All of the above could of course be wrong, me not being a > programmer. </disclaimer> Nope, you're not wrong, that is the current state of the HDQ/1wire driver as far as I am able to tell. I too need 1wire in order to read out some DS2411 chips I've scattered around, and it looks like this will be a chunk of development I'll have to schedule in. -A. |
From: KimBP <ki...@fa...> - 2014-02-05 09:19:51
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Hi Andrew Did you ever manage to setup OMAP 1-wire for reading DS2411? I now have to do the same, but there seems not to have come any public updates to the kernel? Except from the PAD muxing did you configure anything in the kernel related to this? I can't detect any activity on the HDQ_SIO pin, which I would expect even in HDQ mode. KimBP -- View this message in context: http://gumstix.8.x6.nabble.com/hdq-1wire-module-tp659300p4968674.html Sent from the Gumstix mailing list archive at Nabble.com. |