[beagleboard] Alternate Hardware Drivers and Device Tree
I would like to be able to make use of some internal hardware on the AM335x (like PWM, SPI, and CAN) for hard real-time operations. In order to get these pieces of hardware powered on with clocks and out of reset, it's necessary to include them in the device tree bindings. But this loads the kernel-mode device driver which will typically conflict with my code (executing in a real-time thread on the ARM or in the PRU). There's an old LWN article about using bind/unbind to disable a driver and allow the underlying hardware to be controlled by something else: https://lwn.net/Articles/143397/ Is this still how I should handle replacing the kernel driver for a chunk of hardware, or is there an alternate means to do this with a recent 3.x kernel? The article references kernel 2.6.13, which is pretty long in the tooth these days! :) -- Charles Steinkuehler char...@steinkuehler.net -- 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] Best node performance for an expressjs app
The log I'm getting from this example app shows a minimum response time of
4 - 17 ms. The route itself is doing nothing. Is this the quickest
response node can do on the bbb? The board is only running the example
server.
GET / 200 16.876 ms - 0
GET / 200 4.474 ms - 0
GET / 200 4.592 ms - 0
GET / 200 4.375 ms - 0
GET / 200 4.858 ms - 0
GET / 200 4.613 ms - 0
GET / 200 4.588 ms - 0
GET / 200 4.397 ms - 0
GET / 200 4.667 ms - 0
GET / 200 4.406 ms - 0
Current experiment code
var express = require('express');
var app = express();
app.configure(function() {
app.use(express.logger('dev'));
});
app.get('/', function (req, res) {
res.send('')
})
var server = app.listen(3000, '0.0.0.0', function () {
var host = server.address().address
var port = server.address().port
console.log('Example app listening at http://%s:%s', host, port)
})
--
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[beagleboard] I need to reverse the changes made by installing PAE.
Unfortunately, I performed an install of PAE but actually didn't need it as to my computer is 64-bit Ubuntu 14.04. Now it only runs from the livecd. I need a step-by-step guide to reverse the install settings. -- 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: Load and execute PRU code from bare-metal application
Am Donnerstag, 26. März 2015 08:38:50 UTC+1 schrieb BryanB: Did you ever make any progress with your questions? I'd suggest to have a look into this thread: https://groups.google.com/forum/#!category-topic/beagleboard/pru/rCO-2nKynVE -- 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] BBB not accessible
Hello, I am looking for some help. Appreciate any input. I have a BBB running Ubuntu 14.04. I also have TP-Link TL-725N wifi dongle. I did follow instructions from this site to http://coremega.tumblr.com/post/78194792401/install-tp-link-wireless-n-adapter-tl-wn725n-on to build the required drivers for the wifi dongle to work. After compiling the wifi dongle works. I am using the BBB along with OpenSprinkler h/w to irrigate my landscape. The BBB is powered by the OpenSprinkler h/w. The issue I have is that approximately 36 hrs to 48 hrs after a boot up, the BBB becomes inaccessible. I have to go and unplug the power and put it back in to restart it. I keep pinging it all the time from my computer at home so that I am convinced I can access it. But when the board is not accessible, ping comes back saying Request timeout for icmp_seq 44990 ping: sendto: Host is down. I cannot ssh as ssh times out. I can see that the heartbeat led is not on. Only the power led is lit and stays on as it does always. Since the h/w is mounted on a case out side my home right by my irrigation valves, I cannot run a network cable directly to it. I am dependent on the wifi dongle to get access to the BBB. I have been struggling the past couple of weeks when I purchased the BBB. I did look at the syslog file in /var/log and at the time of failure, the syslog has a bunch of ^@ symbols for a couple of lines. I am not sure what else I could do to make this board stay up. FWIW, the board is pretty much inactive on times when there is nothing to do. The irrigation program is used on demand once every 3 days or so. Much depends on how hot it gets and how the soil gets dry etc... Any suggestions as to what might be happening here and if I should try some thing? Ram -- 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.
Re: [beagleboard] BBB not accessible
On Mon, Mar 30, 2015 at 12:34 PM, ifmx4e...@gmail.com wrote: Hello, I am looking for some help. Appreciate any input. I have a BBB running Ubuntu 14.04. I also have TP-Link TL-725N wifi dongle. I did follow instructions from this site to http://coremega.tumblr.com/post/78194792401/install-tp-link-wireless-n-adapter-tl-wn725n-on to build the required drivers for the wifi dongle to work. After compiling the wifi dongle works. I am using the BBB along with OpenSprinkler h/w to irrigate my landscape. The BBB is powered by the OpenSprinkler h/w. The issue I have is that approximately 36 hrs to 48 hrs after a boot up, the BBB becomes inaccessible. I have to go and unplug the power and put it back in to restart it. I keep pinging it all the time from my computer at home so that I am convinced I can access it. But when the board is not accessible, ping comes back saying Request timeout for icmp_seq 44990 ping: sendto: Host is down. I cannot ssh as ssh times out. I can see that the heartbeat led is not on. Only the power led is lit and stays on as it does always. Since the h/w is mounted on a case out side my home right by my irrigation valves, I cannot run a network cable directly to it. I am dependent on the wifi dongle to get access to the BBB. I have been struggling the past couple of weeks when I purchased the BBB. I did look at the syslog file in /var/log and at the time of failure, the syslog has a bunch of ^@ symbols for a couple of lines. I am not sure what else I could do to make this board stay up. FWIW, the board is pretty much inactive on times when there is nothing to do. The irrigation program is used on demand once every 3 days or so. Much depends on how hot it gets and how the soil gets dry etc... Any suggestions as to what might be happening here and if I should try some thing? What kernel are you actually running? uname -r other thoughts.. and did you disable hdmi? have you disable wifi pm? Regards, -- Robert Nelson https://rcn-ee.com/ -- 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] PRUSPEAK now supports uS delays
Hey all, You can now send uS delays to PRU using WAIT instructions. https://github.com/shubhi1407/pruspeak ( pull request pending ) https://github.com/deepakkarki/pruspeak/pull/7 ( pull request. Explains additions which have been done ) Thanks Shubhangi -- 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] 8 port 1-wire cape
I have a project that will use more than 8 1-wire sensors. Since the 1-wire networks is sensor addressable, I was wondering if it is possible to use one of the 8 port cape RJ11 jacks for more than one 1-wire sensor? -- 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: Android running on BBB with Linux 3.8
I've downloaded the image and using DD I have applied in my microSD. After DD finished, my microSD mounted 3 partitions. I've put it my BeagleBone Black but the android did not start (even with the boot button pressed). I don't know what was wrong. Em segunda-feira, 17 de junho de 2013 21:00:07 UTC-3, Andrew Henderson escreveu: Hello all. I posted this information over at the Google+ group for BeagleBoard.org, but I wanted to post it here as well. I have Android running on the BBB using the Jellybean (4.2.2) source from arowboat.org and the Linux 3.8.13 kernel from my BeagleSNES project (www.beaglesnes.org). I just added the Android drivers (Drivers - Staging Drivers - Android) into the same kernel configuration that I use for BeagleSNES. This kernel is really just a stripped down configuration (a 1.9 meg zImage) using Robert Nelson's 3.8.x kernel source tree. Instead of using the GCC cross-compiler that comes in Rowboat's current prebuilt tools, I use the 3.7 GCC that comes with Robert's kernel tree to build the entire system. I also updated the u-boot to v2013.04. Here is a video of it running: https://www.youtube.com/watch?v=yeSt1Y7FhEs Here is the download of a working Android image that can be written onto a 4GB microSD card using dd: http://icculus.org/~hendersa/BBB_JB_Android_3_8_13.img.bz2 There is no hardware accelerated video in this version, since SGX support isn't ready for the 3.8 kernel. To shut off hardware accelerated video, I pass qemu=1 as a kernel command line argument in uEnv.txt and I add debug.egl.hw=0 to the /system/build.prop file in the root file system. To get rid of that blinking cursor on the framebuffer (which I accidentally left on in the image that I made), add this to the uEnv.txt kernel command line arguments: vt.global_cursor_default=0 This build will be of interest to Android experimenters who want to use HDMI for audio and video output (rather than using an LCD cape) and who want to experiment with using the device tree. My kernel is pretty stripped down, so feel free to fetch Robert's latest kernel source for the 3.8.x branch and rebuild your own kernel to drop into the image that I have supplied. That way, you can include whatever drivers you would like in your kernel. Use a USB mouse (and a keyboard, too, if you want) to interact with the system. Thanks, and enjoy! Andrew -- 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] Beagleboard XM and Leopard Imaging LM-5M03
I have an XM board and LI-5M03 camera board from Leopard Imaging that I am selling on ebay, should anyone be interested in purchasing this hardware. You are bidding on an unopened Beagleboard XM and an opened but never used LI-5M03 camera board that can be plugged into the camera port on the XM board. The Beagleboard is $149 at Newark and the Camera is $75 at Leopard Imaging but both are available only by special order, whereas you can have both as soon as I can ship them to you. -- 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.
Re: [beagleboard] 8 port 1-wire cape
not tested but http://lxr.free-electrons.com/source/drivers/w1/masters/w1-gpio.c?v=3.14 http://www.raspberrypi.org/forums/viewtopic.php?f=44t=65137 might be its possible 2015-03-31 4:20 GMT+08:00 fcampai...@gmail.com: I have a project that will use more than 8 1-wire sensors. Since the 1-wire networks is sensor addressable, I was wondering if it is possible to use one of the 8 port cape RJ11 jacks for more than one 1-wire sensor? -- 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. -- 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.
Re: [beagleboard] Re: Having to manually start Wifi
Brian: Thanks for the pointers. I will go read up on it. Thanks, --- Graham == On Fri, Mar 27, 2015 at 7:06 PM, Brian Anderson b...@nwlink.com wrote: Since you are using Jessie images, have you tried using ConnMan to manage the WiFi connection rather than resorting to all of this systemd and ifup/ifdown stuff? You can configure ConnMan using the connmanctl command line utility, or via the cmst GUI utility. to setup your link (ssid, credentials). Or, you can create a config file and put it in /var/lib/connman/my_config.config. There is documentation in the ConnMan source tree on this format. I've also attached a template for reference. You might also consider adding '/etc/connman/main.conf' and specify PreferredTechnologies in the order that you want. Again, there is documentation in the ConnMan source tree on this file, and also the Google will help. Note that if you use this method, you should NOT do any wifi configuration in /etc/network/interfaces as ConnMan will override these. If you would rather use /etc/network/interfaces, then be careful that you don't also have conflicting configuration setup with ConnMan, as ConnMan will override configuration in /etc/network/interfaces. I use the ConnMan method all the time for my work and have no problem getting a WiFi connection after boot using my TP-Link TL-WN-722N (uses an Atheros chipset), Jessie snapshot images, and 3.19.x kernels. ba -- 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/rRHUR8mltmg/unsubscribe. To unsubscribe from this group and all its topics, send an email to beagleboard+unsubscr...@googlegroups.com. 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Issue with CAN cape
On Mon, Mar 30, 2015 at 10:44 AM, frudak.chors...@gmail.com wrote: Hi there! I don't know how to get BBB's DCAN1 working, though I've been striving for quite a long time. I installed the OS from a Debian image available at http://beagleboard.org/ and followed the guide http://dev.ardupilot.com/wiki/building-the-code/building-for-beaglebone-black-on-linux/ to make the kernel RT-Preempt: root@beaglebone:~# uname -a Linux beaglebone 3.8.13-rt9-00899-g3d8f2b1 #1 SMP PREEMPT Sat Jan 31 12:22:12 CET 2015 armv7l GNU/Linux To work with DCAN1, I also followed the guide http://www.embedded-things.com/bbb/enable-canbus-on-the-beaglebone-black/ using the suggested device tree overlay: root@beaglebone:~# modprobe can root@beaglebone:~# modprobe can-dev root@beaglebone:~# modprobe can-raw root@beaglebone:~# echo BB-DCAN1 $SLOTS root@beaglebone:~# cat $SLOTS 0: 54:PF--- 1: 55:PF--- 2: 56:PF--- 3: 57:PF--- 4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G 5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI 6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN 7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-DCAN1 root@beaglebone:~# /sbin/ip link set can0 up type can bitrate 50 root@beaglebone:~# ifconfig can0 up root@beaglebone:~# ifconfig can0 can0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 UP NOARP MTU:16 Metric:1 RX packets:3 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:10 RX bytes:24 (24.0 B) TX bytes:0 (0.0 B) Interrupt:71 Pins seem to be muxed correctly: root@beaglebone:~# cat $PINS | grep 984 pin 97 (44e10984) 0032 pinctrl-single root@beaglebone:~# cat $PINS | grep 980 pin 96 (44e10980) 0012 pinctrl-single Now, as I run a simple cansend-candump test on can0, candump doesn't get anything. Is there anyone who can help me out? Thank you Well that 3.8.13 RT kernel isn't maintained anymore. Other then Can0 what else do you need? As you could just grab the latest image: http://beagleboard.org/latest-images then install the 3.14.x RT kernel: sudo apt-get update ; sudo apt-get install linux-image-3.14.35-ti-rt-r56 ; sudo reboot (right now i only have can1 built by default: dtb=am335x-boneblack-can1.dtb You can use dtb-rebuilder to enable can0.. Regards, -- Robert Nelson https://rcn-ee.com/ -- 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.
