Thanks for the tip.
I tried correcting that line first to: gpios = <&gpio1 13 0>; and then to gpios = <&gpio2 13 0>; I'm not sure which of these is correct, though I would have thought it was gpios = <&gpio1 13 0>; But still no go. Sounds like I need to change to 4.1. I see that RCN's link leads to a bash script that allows more time for detection? Could this problem be related to not enough time being allowed for detection. Would the script work under 3.8, and might it solve the problem? Thanks Matt On Tuesday, April 5, 2016 at 10:30:33 AM UTC+10, William Hermans wrote: > > gpios = <&gpio1 2 0> > > &gpio1 I'm pretty sure is reference to the gpio bank. There is 4 I think > for all gpio's on the processor. The two numbers that follow . . . I > honestly have no idea either. > > I can hoever tell you that: > pinctrl-single,pins = <0x34 0x37 /* gpmc_ad13.gpio1_13, > OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE7 - w1-gpio */ >; > > 0x34 is the pin number, and 0x37 is the pin mode. Which peripheral, or > GPIO mode, whether it's input, or output, and whether pull up, or pull down > is enabled. Pretty much my understanding here is a 32bit field with each > bit indicating *something*. > > On Mon, Apr 4, 2016 at 5:25 PM, REDDING Matthew <[email protected] > <javascript:>> wrote: > >> Eagle eyes! >> >> >> >> I’ll try changing that back and see what happens. >> >> I must confess, I don’t even know what gpios = <&gpio1 2 0>; does. >> >> So I’m not sure where any changes came from. >> >> >> >> I think I know what the other line you indicated does. >> >> >> >> >> >> Kind regards >> >> >> >> >> >> Matt Redding, Ph.D. >> >> Soil Chemist/Geochemist >> >> AgriScience Queensland >> >> Queensland DAFF >> >> >> >> 0408 787100 >> >> 07 46 88 1372 >> >> >> >> >> >> >> >> *From:* [email protected] <javascript:> [mailto: >> [email protected] <javascript:>] *On Behalf Of *William Hermans >> *Sent:* Tuesday, 5 April 2016 10:22 AM >> *To:* [email protected] <javascript:> >> *Subject:* Re: [beagleboard] Re: Troubleshooting one-wire DS18B20 >> detection on BBB, debian, kernel: 3.8.13-bone70 >> >> >> >> *Using the modprobe w1-gpio produces no output.* >> >> >> >> *Is this where the problem is?* >> >> >> >> *Thanks* >> >> >> >> *Matt* >> >> So, I'm not 100% sure what the problem is. I've never used One wire in >> linux - ever - And I'm not 100% sure what driver needs to be loaded, if any >> for this specific device. I'm just trying my best to help you troubleshoot >> the problem, because obviously there is something wrong, if the device does >> not show up on several boards, using several devices. >> >> So Matt, I noticed you've changed the GPIO pin here: >> >> gpios = <&gpio1 2 0>; >> >> But not here: >> >> pinctrl-single,pins = <0x34 0x37 /* gpmc_ad13.gpio1_13, >> OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE7 - w1-gpio */ >; >> >> So do keep in mind that I'm no device tree file expert. So I'm not sure >> if that is bad, or not. But it *seems* wrong to me. Maybe I'm wrong ? >> >> >> >> On Mon, Apr 4, 2016 at 5:14 PM, <[email protected] <javascript:>> >> wrote: >> >> Hi William and Peter... >> >> >> >> root@beaglebone:~# lsmod >> Module Size Used by >> arc4 1691 2 >> zd1211rw 43946 0 >> >> mac80211 424813 1 zd1211rw >> cfg80211 354018 2 mac80211,zd1211rw >> rfkill 16672 2 cfg80211 >> g_multi 50407 2 >> libcomposite 15028 1 g_multi >> omap_rng 4062 0 >> mt7601Usta 639170 0 >> >> >> >> >> >> Using the modprobe w1-gpio produces no output. >> >> >> >> Is this where the problem is? >> >> >> >> Thanks >> >> >> >> Matt >> >> >> >> >> On Tuesday, April 5, 2016 at 10:08:36 AM UTC+10, William Hermans wrote: >> >> william@beaglebone:~$ sudo modprobe w1-gpio >> william@beaglebone:~$ lsmod >> Module Size Used by >> w1_gpio 3069 0 >> wire 27112 1 w1_gpio >> . . . >> >> *My understanding was that 3.8 and above kernels needed no module, simply >> the DTO. It was pre 3.8 kernels that required the kernel module. Or am I >> missing something there? Certainly, every page I'm reading referring to 3.8 >> kernel 1Wire has absolutely no reference to kernel modules.* >> >> So, perhaps, but if there is something wrong with the device tree blob >> file, the driver wont auto load. Which would give us an indication as to >> what's wrong. >> >> >> >> >> >> On Mon, Apr 4, 2016 at 5:01 PM, Peter Lawler <[email protected]> wrote: >> >> >> >> On 2016/04/05 9:49 AM, William Hermans wrote: >> >> Ok, so the device tree seems to load but where is >> the output of lsmod ? It should look something like( more or less ) with >> hopefully the generic one-wire module also loaded. >> >> >> My understanding was that 3.8 and above kernels needed no module, simply >> the DTO. It was pre 3.8 kernels that required the kernel module. Or am I >> missing something there? Certainly, every page I'm reading referring to 3.8 >> kernel 1Wire has absolutely no reference to kernel modules. >> >> P. >> >> >> >> -- >> 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/d/optout. >> >> >> >> -- >> 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] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to a topic in the >> Google Groups "BeagleBoard" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/beagleboard/nT93pfbvCzQ/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> >> ------------------------------ >> >> The information in this email together with any attachments is intended >> only for the person or entity to which it is addressed and may contain >> confidential and/or privileged material. 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