[beagleboard] Re: Universal Overlay, enabling a single pin
Hi Ray, This one worked for me, there are a couple of errors in the DTS code which are mentioned in the posts below the main instructions but other than that it works fine. I have 10 sensors working on the same pin returning temperature. http://www.bonebrews.com/temperature-monitoring-with-the-ds18b20-on-a-beaglebone-black/ Cheers Dave On Tuesday, 17 March 2015 22:59:37 UTC, Ray Madigan wrote: I have been trying to figure out how to get a single gpio pin to work with my ds18b20 onewire device. I have installed dtb-rebuilder and looked at the device tree definitions in am335x-boneblack.dts and I get the idea that I can comment different sections to get the specific sets of pins to work. I have an old dts file, from 9 months ago or so, but I don't see how it fits in with universal-io. It seems like I need a file xxx.dtsi, and they don't look like the dts files. How do I figure this out? -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: GPIO Digital input voltage more than 3.3V
The Texas Instruments TBX0101 IC should do the trick. The BBB connects to port A and the speed sensor to Port B. Use the BBBs 3.3V supply to connect to VccA. Depending on the speed sensor supply I'd regulate that down to +5V to connect to the VccB pin (can only take up to 5.5V max). Farnell do the IC part number 2335605. There's a good data sheet to accompany it as well. Cheers Dave -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Onewire DTS file
Hi all, Does anyone out there actually understand what the gpios = lt;amp;gpio2 13 0gt;; line does in the onewire DTS file. Somebody somewhere must have designed this function but I can find no reference to it anywhere. It seems that the general consensus is to take a similar dts file and modify it for what you want it to do. I really want to have 4 x onewire lines active for a mass of temperature sensors but I've been unable to get it to work. Any help would be really appreciated. Cheers Dave -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: Onewire DTS file
Okay so that should read gpios = gpio2 13 0; was expecting html reactions -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: How to use 2 simultanous pins for ds18b20 sensors
Hi Azar, Did you ever get this working, am trying to do the same but with no success. Cheers Dave On Wednesday, 12 November 2014 13:36:04 UTC, gem...@gmail.com wrote: Hi, I am trying to interface 17 sensors with my bbb, 10 works great for any pin... more 10 sensors are not supported so far as per my poor understanding using single pin. I there any possible way to use more than one pin for Dallas 1wire. if yes, what mods I would need to do to dts file. I have played with my dts file in many possible ways to no success. It just doesn't take second pin. Regards. Azar -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
