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  • [00:00:55] * Topic is 'http://bbb.io/chat has a guide on how to ask questions and links to the logs | never ask to ask, just ask | be patient | pastebin a boot log | http://bbb.io/boot | http://bbb.io/start | http://bbb.io/latest | http://bbb.io/bone101 | books: http://bbb.io/books'
  • [00:00:55] * Set by jkridner!~jkridner@pdpc/supporter/active/jkridner on Wed May 24 15:57:17 UTC 2017
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  • [02:00:43] <Guest34529> Hi I came here from the google summer of code webpage after reading the description of this opensource project, and was wondering if anyone has mentored a student for this project before or could provide information about the experience.
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  • [05:51:56] <gabe> hi
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  • [05:55:59] <gabe> hi
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  • [09:38:06] * keesj just backed https://www.crowdsupply.com/qwerty-embedded-design/beaglewire
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  • [09:47:53] <zmatt> gpmc used to interface with it... i.e. incompatible with eMMC, that sucks
  • [09:49:37] <zmatt> or maybe it's just an option to use it, I should first read more I guess
  • [09:54:31] <zmatt> yeah I guess it is, the only thing that's required is spi (to program it)
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  • [10:01:25] <zmatt> I wonder what was the motivation for connecting an sdram to the fpga is... sacrificing a *ton* of i/o to attach a large amount of fairly slow memory to an fpga seems like an odd thing to do unless you have a very specific purpose for it
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  • [10:23:47] <zmatt> and they're using their own 3.3v LDO powered from sys_5v instead of using the 3.3v from the beaglebone /o\
  • [10:24:37] <blathijs> zmatt: They might need more current than the BB can supply on 3.3V?
  • [10:27:43] <zmatt> blathijs: an fpga doesn't have high-current i/o, and you can't draw that much more from sys_5v either.
  • [10:28:16] <zmatt> also, this makes using the fpga's self-configuration feature using the spi flash unsafe, since it may start driving beaglebone i/o before its i/o supply is up, damaging the beaglebone
  • [10:29:25] <zmatt> at the very least they should have grouped the beaglebone-facing i/o on one of the fpga's i/o banks and power that one from the beaglebone
  • [10:29:41] <keesj> zmatt: I have not looked very deeply into the design. I hope to be able to combine BB and the FPGA board in a similar way it was done with the fruity pi device
  • [10:30:45] <keesj> https://www.youtube.com/watch?v=UMDcnwZA2YE (long video but nice pointers/explanation on generating socs and the communication between the FPGA and a more general purpose device
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  • [10:31:16] <keesj> my BB's have mostly been collecting dust (and they are not the $LATESET release with lager mmc)
  • [10:32:07] <keesj> the shear idea of the well documented beaglebone soc and the reverse engineerd FPGA and open source tools to run code on them is really appealing
  • [10:33:56] <zmatt> I think it would have been nicer if they removed the sdram, and had two i/o banks connected to the beaglebone (powered by its 3.3v) and two i/o banks for external i/o with an option to provide the voltage for those two banks externally
  • [10:34:48] <zmatt> and probably have the beaglebone-facing i/o on pins that can be used by pru rather than gpmc pins
  • [10:35:36] <zmatt> but *shrug*
  • [10:37:13] <zmatt> (right now the i/o allocation is: 40 external, 24 beaglebone, 30 sdram, 8 user interface, 4 spi, 1 osc)
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  • [10:48:35] <keesj> Well... I can not do better at this stage :P
  • [10:48:45] <keesj> open source consumer
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  • [11:10:26] <keesj> isn't ddr usefull for running a soft core?
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  • [11:27:07] <zmatt> ... why would you want to run a soft core on an fpga that's already connected to a SoC ?
  • [11:27:38] <zmatt> and it's not ddr, it's sdram
  • [11:28:20] <zmatt> oh it is ddr, nm
  • [11:28:37] <zmatt> is it? wait
  • [11:28:42] <zmatt> no it's not
  • [11:29:29] <zmatt> micron's page was confusing me for a bit
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  • [15:32:41] <myself> Presumably for learning FPGA concepts rather than implementing a serious device, having a soft core in the FPGA might be sensible. Also, custom instructions.
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  • [15:35:15] <zmatt> also, would that even fit in a small fpga like this? (4K LUTs)
  • [15:35:47] <zmatt> sorry, way fewer than that
  • [15:36:07] <zmatt> somewhat fewer I mean
  • [15:36:21] <zmatt> 3520 "logic cells"
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  • [15:36:54] <zmatt> plus you'd need to spend logic on the memory controller as well
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  • [15:48:28] <myself> I have no idea; fpga's aren't really my thing. Maybe the ram is just there as a buffer?
  • [15:48:58] <zmatt> yes but what for?
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  • [15:51:18] <zmatt> I didn't say there aren't applications for it, and I can think of applications myself, but I was just wondering why they'd put it on a general-purpose fpga cape... being able to almost double the amount of external i/o seems way better to me
  • [15:51:48] <zmatt> the fpga has some amount of on-chip SRAM for fast buffering anyway
  • [15:56:39] <zmatt> lol what... the fpga has 8 "low-skew global lines, designed primarily for clock distribution"
  • [15:56:52] <zmatt> the oscillator on the beagle-wire is connected to none of them
  • [15:56:58] <zmatt> it just uses a random i/o
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  • [19:52:37] <Cicero> Greetings, greetings, greetings.... can anyone point me to X15 expansion boards? I need to expand the number of 1GigE port from the 2 the X15 comes with to at least 4, better 5.
  • [20:10:54] <zmatt> uhh
  • [20:11:17] <zmatt> connect a switch to it?
  • [20:11:32] <zmatt> the SoC only has two ethernet ports
  • [20:11:51] <Cicero> Need individual controllers, physically separate ports.
  • [20:12:11] <Cicero> I know it only has two, I mentioned that in my initial post
  • [20:12:39] <zmatt> why not use a VLAN switch with a trunk port to the x15 to keep the ports logically separated?
  • [20:13:26] <zmatt> yes but what I was saying is that you can't have an expansion board bring out interfaces that don't exist on the expansion headers
  • [20:13:30] <zmatt> or, well,
  • [20:13:36] <Cicero> I repeat, I need physcially distinct GigE controllers. Why asking me to modify my requirements. If you don't know it's okay.
  • [20:13:38] <zmatt> I guess since there's PCIe there you might
  • [20:13:51] <zmatt> I'm trying to help you find alternatives that actually exist
  • [20:14:32] <Cicero> If X15 expansion boards don't exists, just say so, not interested in alternatives. If I go that route I'll make my own
  • [20:15:48] <zmatt> have fun
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  • [20:22:23] <myself> Aw.
  • [20:22:25] <myself> http://www.jetwaycomputer.com/JBC130F53306.html
  • [20:22:29] <myself> I just went and found him this.
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  • [21:23:38] <zmatt> nono, he wanted an expansion board *for the x15* that provides additional gigabit ethernet ports, not any alternative solution :P
  • [21:29:47] <tbr> :D
  • [21:32:51] <myself> He can tape an x15 to the chassis.
  • [21:33:07] <myself> That probably counts as "make my own"
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  • [21:41:24] <zmatt> he'll just have to make an expansion board with a 2/3 port pcie gigabit ethernet controller, or 2/3 gigabit ethernet controllers on a pcie switch
  • [21:41:31] <zmatt> probably a piece of cake ;)
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  • [21:50:21] <myself> yeah, I mean I made a board like that before breakfast this morning. Why isn't the market flooded with those?
  • [21:50:58] <myself> Maybe if I stomp my feet a little..
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  • [22:18:16] <bien_salad> Hello...
  • [22:25:01] <bien_salad> Pray for rain...I am setting up the Motor Bridge Cape. Pears and the BBB!
  • [22:39:47] <bien_salad> no-go
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  • [22:51:34] <bien_salad> damn...
  • [22:51:57] <bien_salad> zmatt: I tried that software change. I left a message.
  • [23:02:41] <zmatt> please note I prefer irc. it's also a bit annoying that you've turned my bugfix report issue into your own support thread
  • [23:03:08] <zmatt> that error just means you don't have Adafruit_GPIO installed, again
  • [23:05:59] <bien_salad> I have it installed.
  • [23:06:01] <bien_salad> Oh.
  • [23:06:05] <bien_salad> I gave you credit.
  • [23:06:34] <bien_salad> Your credit is #6 on Seeed-Studio's issue report.
  • [23:06:57] <bien_salad> I think I put that on the software change.
  • [23:07:13] <bien_salad> I did not want to tell on you by giving out your personal info. w/out your permission.
  • [23:07:32] <bien_salad> e.g. name on irc or github.com.
  • [23:08:33] <bien_salad> <<<< on a smoke break but first, my Adafruit_GPIO must be installed elsewhere or out of the PATH I need. I will test it before the smoke break.
  • [23:11:35] <bien_salad> ...
  • [23:12:24] <bien_salad> I installed Adafruit_Python_GPIO w/ their instruction on that page/GitHub.com/adafruit/adafruit-python-gpio.
  • [23:13:14] <bien_salad> I ran the software w/ your changes on the Github.com, Seeed-Studio page. import as instead of from import and etc...
  • [23:13:16] <bien_salad> ...
  • [23:13:16] <zmatt> you had it working earlier though
  • [23:13:23] <zmatt> so you must have mucked something up again
  • [23:13:24] <bien_salad> Nope. Not on this board.
  • [23:13:47] <zmatt> also, weren't you going to test a working setup you already had to check on the pin configuration?
  • [23:13:51] <bien_salad> Well...yea. I set up a new image today. I used bbb.io/latest-images to set up a new one.
  • [23:13:56] <bien_salad> ...
  • [23:14:02] <bien_salad> Yea. I need to do that still. Sorry.
  • [23:14:33] <zmatt> well anyway, you clearly managed to successfully install it before, I'm sure you can manage to do it again
  • [23:14:42] <bien_salad> ...
  • [23:14:52] <bien_salad> Okay. I am just harassing you at this point. I will back off.
  • [23:15:13] <bien_salad> <<<< off to smoke and check other boards w/ the other images and setups.
  • [23:15:29] <zmatt> kinda yes. next time just read the error message, it literally said it couldn't find the module
  • [23:16:00] <zmatt> also, it's an error you've had before and I then also pointed out it just means you didn't have it installed
  • [23:16:22] <bien_salad> Yea. I have new errors. IOError: [Errno 121] Remote I/O Error
  • [23:16:35] <zmatt> *that* is the only real error so far
  • [23:16:40] <bien_salad> Okay.
  • [23:16:49] <zmatt> but that's not what you spent two github comments on just now
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  • [23:17:16] <zmatt> for figuring out the i2c error I suggested dumping the pin configuration in a working setup for comparison
  • [23:17:17] <bien_salad> zmatt: Look man, you are right as usual. I messed up. Please forgive me. I will resuit the gitHub.com posts.
  • [23:17:24] <bien_salad> I remember.
  • [23:17:41] <bien_salad> I will do that today.
  • [23:18:07] <bien_salad> ...just a heads up. I might use pastebin later.
  • [23:19:43] <mehdi> Does anyone here use gsl1680 controller for touch support? I have some problem ...
  • [23:21:15] <mehdi> http://linux-sunxi.org/GSL1680
  • [23:24:14] <mehdi> i think i have i2c problem!
  • [23:25:35] <mehdi> i2cdetect commands output : https://paste.ubuntu.com/p/JVDWF4gFvT/
  • [23:26:31] <mehdi> in the linux-sunxi article "The GSL1680 always answers at the address 0x40"
  • [23:26:47] <mehdi> but there is nothing in 0x40
  • [23:28:27] <zmatt> check hardware connection and pull-ups ?
  • [23:28:56] <zmatt> btw it is in general not recommended to use i2cdetect (see the big warning it prints)
  • [23:29:49] <zmatt> also make sure this "iocntl" pin mentioned on that wiki page is high
  • [23:31:50] <mehdi> hardware connection is OK.because i test with another ubuntu image and works correct
  • [23:32:01] <mehdi> i use debian
  • [23:32:41] <mehdi> zmatt, PINs set in am335x-boneblack.dts file? or in other files
  • [23:33:38] <zmatt> I'm assuming you're using i2c-2 on P9.19-P9.20, which is setup by default
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  • [23:34:21] <zmatt> you can double-check the current pin configuration e.g. by using
  • [23:34:41] <zmatt> ... by using my show-pins script: https://github.com/mvduin/bbb-pin-utils/blob/master/show-pins
  • [23:35:45] <zmatt> i2cdetect did detect something connected to i2c-2 though, at address 0x50 ?
  • [23:36:48] <mehdi> yes 50
  • [23:38:49] <zmatt> bien_salad: jesus seth, what on earth do you keep rambling about on github?
  • [23:40:32] <mehdi> zmatt, https://paste.ubuntu.com/p/NJzJs46GF2/
  • [23:40:42] <mehdi> your script output for the PINs
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  • [23:41:46] <mehdi> there is no IOCNTL and INT
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  • [23:43:26] <mehdi> complete output : https://paste.ubuntu.com/p/ygWMjFHF5n/
  • [23:44:25] <zmatt> which cape is this?
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  • [23:45:38] <zmatt> also, which debian image are you using?
  • [23:46:12] <zmatt> I just noticed that bogus configuration of P9.42, which might be indicative of a really old bootloader being used?
  • [23:47:33] <mehdi> i am using a custom cape
  • [23:47:44] <mehdi> and my debian is stretch
  • [23:48:36] <zmatt> which image date? and are you booting from emmc or sd card?
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  • [23:50:02] <zmatt> (even when booting from sd card it will still prefer to load u-boot from emmc instead of sd, which means that an old u-boot there can cause weird issues)
  • [23:50:31] <mehdi> i don't know exactly the image date! but i use the "Linux beaglebone 4.4.113-ti-r145" kernel
  • [23:50:37] <mehdi> and booting from SD Card
  • [23:51:02] <zmatt> kernel version doesn't say much (although it isn't a particularly recent one). you can find the image date in /etc/dogtag
  • [23:51:27] <zmatt> if you don't care about the contents of eMMC, consider wiping it using sudo blkdiscard /dev/mmcblk1
  • [23:51:32] <mehdi> "BeagleBoard.org Debian Image 2017-10-10"
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  • [23:51:52] <zmatt> okay, not very recent but also not very old
  • [23:52:19] <JGriff> Hey sorry guys, don't want to interrupt. I'm trying to use the PRUs on a BBB that I bought a while back. I loaded the most recent Debian image onto the board. I'm finding a ton of tutorials but they all seem to be out of date. Does the most recent build use device trees anymore? Can someone point me to a good tutorial on how to use and develop code for the PRUs?
  • [23:52:27] <zmatt> your custom cape have an identification eeprom to allow automatic loading of the appropriate overlay?
  • [23:52:38] <zmatt> and you're currently trying to make that overlay, or ?
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  • [23:53:07] <zmatt> JGriff: uptodate documentation is indeed an issue
  • [23:54:17] <zmatt> JGriff: device trees are most definitely still used, it's how information about the hardware is communicated to the kernel. in the current debian releases you usually don't have to meddle directly with it anymore though (i.e. via overlays), although you still can
  • [23:54:51] <zmatt> there are two ways of working with the PRUs, either uio-pruss or remoteproc-pru
  • [23:55:09] <zmatt> you can select which one you want to enable by uncommenting the appropriate line in /boot/uEnv.txt
  • [23:55:43] <zmatt> uio-pruss is probably the better choice and will match better with most documentation you'll find
  • [23:57:14] <zmatt> to use pru's direct i/o you should configure the pins you want to use using the 'config-pin' utility
  • [23:58:21] <zmatt> e.g. config-pin P9.30 pruout
  • [23:59:04] <mehdi> zmatt, I have three part : 1 - beaglebone 2 - An evaluation board 3 - touch screen controller
  • [23:59:13] <mehdi> image of board : https://pasteboard.co/Hag5eCZ.jpg
  • [23:59:33] <mehdi> and now i want to get touch working.