In order to use the hcsr-04 ultrasonic sensor using BBB's PRU, I have tried this git :
https://github.com/HudsonWerks/Range-Sensor-PRU
I get the error "the PRU failed to open", when I try to start "rangepru".
Doing some research, I feel like that is because my PRU is not initialized and that I should do : "echo BB-BONE-PRU-01 > /sys/devices/bone_capemgr.8/slots" to correct it.
But with the recent debian versions (4.x), the cape manager changed and I found the file "slots" at:
/sys/devices/platform/bone_capemgr/slots ; BUT, there is no way to open, modify it :
- using "nano" I get "slots.swp Permission denied"
- and by typing the correct echo command (modified from the one above) : I get : "write error: No such file or directory"
Best regards,
Elrise
You are probably missing a suitable device tree driver.
Try to follow the instructions on:
https://github.com/luigif/hcsr04
related to the compilation and installation of the driver.
If you have a proper development environment, executing make install should do everything for you.
Related
I'm trying to update my application using SWUpdate tool for my embedded board.
I already created my .swu pack, anche with ssh command line, it works fine.
I need to launch the update from my Qt application.
How can I do?
Maybe I can launch QProcess::execute("swupdate -i /run/media/AppUpdate.swu"), but it still not working.
How can I link with Qt the SWUpdate API installed?
Thanks.
You did not state which Qt version you are using. The more recent ones deprecated the QProcess::execute call as you are using it (program name and arguments in one string).
Try this:
QProcess* proc = new QProcess;
proc->setProgram("swupdate");
proc->setArguments(QStringList({"-i", "path/to/your/update.swu"});
proc->start();
if (!proc->waitForStarted())
qCritical() << "failed to start swupdate: " << proc->errorString();
/*optional: block/wait for swupdate to finish*/
proc->waitForFinished(-1);
I recommend to also implement and connect the readyRead signal and save/log swupdate's output in case something goes wrong during the update.
I'm trying to create a process where, on detecting my smart watch connecting to it, my Raspberry Pi (4b 2GB) would automatically download new podcast episodes then transfer them to my watch. I have managed to create a udev rule to execute a shell script on detection, but it seems to skip the most vital commands (upodder and mtp-sendfile)? Code below:
#!/usr/bin/env sh
PATH=$PATH:/home/pi/.local/bin:/home/pi/.vscode-server/bin/485c41f9460bdb830c4da12c102daff275415b53/bin:/home/pi/.local/bin:/home/pi/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/games:/usr/games
echo "Watch connected at $(date)" >>/tmp/scripts.log
# Download new podcasts
/home/pi/.local/bin/upodder
# Transfer podcasts
/usr/bin/mtp-sendfile ~/Downloads/podcasts/WFH_Beckham_Sweden_and_Bango.mp3 /Podcasts
echo "Upodder should've run by now">>/tmp/scripts.log
I know that the file runs because /tmp/scripts.log is created and updated, but the podcasts aren't downloaded or transferred. upodder is a linux podcast downloader and mtp-tools is a way to transfer files through MTP. It's pretty clear that the issue is with these two commands but I can't seem to find the solution anywhere. Thanks in advance.
edit: Iruvar suggestion has helped but now I get the error:
Unable to determine user's home directory, MTPZ disabled.
Device 0 (VID=091e and PID=4c05) is UNKNOWN in libmtp v1.1.16.
Please report this VID/PID and the device model to the libmtp development team
~/Downloads/podcasts/WFH_Beckham_Sweden_and_Bango.mp3: stat: No such file or directory
Seems the issue is with the home directory.
I've been at it for days but could not solve my problem.
I am running:
mpiexec -hostfile ~/machines -nolocal -pernode mkdir -p $dstpath where $dstpath points to current directory and "machines" is a file containing:
node01
node02
node03
node04
This is the error output:
Failed to parse XML input with the minimalistic parser. If it was not
generated by hwloc, try enabling full XML support with libxml2.
[node01:06177] [[6421,0],0] ORTE_ERROR_LOG: Error in file base/plm_base_launch_support.c at line 891
--------------------------------------------------------------------------
ORTE was unable to reliably start one or more daemons.
This usually is caused by:
* not finding the required libraries and/or binaries on
one or more nodes. Please check your PATH and LD_LIBRARY_PATH
settings, or configure OMPI with --enable-orterun-prefix-by-default
* lack of authority to execute on one or more specified nodes.
Please verify your allocation and authorities.
* the inability to write startup files into /tmp (--tmpdir/orte_tmpdir_base).
Please check with your sys admin to determine the correct location to use.
* compilation of the orted with dynamic libraries when static are required
(e.g., on Cray). Please check your configure cmd line and consider using
one of the contrib/platform definitions for your system type.
* an inability to create a connection back to mpirun due to a
lack of common network interfaces and/or no route found between
them. Please check network connectivity (including firewalls
and network routing requirements).
--------------------------------------------------------------------------
[node01:06177] 1 more process has sent help message help-errmgr-base.txt / failed-daemon-launch
[node01:06177] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages
Failed to parse XML input with the minimalistic parser. If it was not
generated by hwloc, try enabling full XML support with libxml2.
[node01:06181] [[6417,0],0] ORTE_ERROR_LOG: Error in file base/plm_base_launch_support.c at line 891
I have 4 machines, node01 to node04. In order to log into these 4 nodes, I have to first log in to node00. I am trying to run some distributed graph functions. The graph software is installed in node01 and is supposed to be synchronised to the other nodes using mpiexec.
What I've done:
Made sure all passwordless login are setup, every machine can ssh to any other machine with no issues.
Have a hostfile in the home directory.
echo $PATH gives /home/myhome/bin:/home/myhome/.local/bin:/usr/include/openmpi:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
echo $LD_LIBRARY_PATH gives
/usr/lib/openmpi/lib
This has previously worked before, but it just suddenly started giving these errors. I got my administrator to install fresh machines but it still gave such errors. I've tried doing it one node at a time but it gave the same errors. I'm not entirely familiar with command line at all so please give me some suggestions. I've tried reinstalling OpenMPI from source and from sudo apt-get install openmpi-bin. I'm on Ubuntu 16.04 LTS.
You should focus on fixing:
Failed to parse XML input with the minimalistic parser. If it was not
generated by hwloc, try enabling full XML support with libxml2.
[node01:06177] [[6421,0],0] ORTE_ERROR_LOG: Error in file base/plm_base_launch_support.c at line 891
Following this question, how do I launch instruments with iPhone simulator as a device.
I tried this:
$ instruments -t /Developer/Platforms/iPhoneOS.platform/Developer/Library/Instruments/PlugIns/AutomationInstrument.bundle/Contents/Resources/Automation.tracetemplate -w iphonesimulator5.0 MyApp.app
But I get this error:
Instruments Usage Error : Device failed to become ready for use.
-w <deviceID> is used only when you wish to specify a hardware device as the destination (the 'deviceID' here is the Identifier of the device, found in the Organizer of Xcode).
Instead of using -w, you can specify a flag during the build to force instruments to use iPhone. Details can be found here.
I was doing it as follows:
1.I created a template in which I was calling my UI Automation Main file that Triggers running all the scripts.
EX:
//Main.js file will run auto.js scripts
//auto.js is my main file in which I am running all the scripts
//Main.js file
#import "auto.js"
auto.run();
//Now open terminal and run the following command.
1. Go to the directory where you saved your template
2.Copy the location where you simulator (full path) is
Than run the command below:
instruments -t ./NameOfYourTemplate.tracetemplate /Users/swathyvalluri/Debug-iphonesimulator/MyApp.app
Note : Create a new file in the template and copy the contents into it what ever you want to put, otherwise it will look for Main.js file in your locally and will fail when running it on another server.
Please let me know if you need more help :)
Device id means here UDID of the device.
Also see the link below, it is very useful :
http://lemonjar.com/blog/?p=69
I'm about to deploy my first Play app, (very excited). I read on playframework.org about the framework id and I want to rejigger my config to take advantage of it. I'm currently on dev but I want to deploy to stage. I want to edit my config to differentiate between dev and stage settings.
My problem, when I type play id I get the following error, "[Errno 13] Permission denied: '/opt/play-1.2.3/id'"
I'm new to Linux BTW.
So I thought, hmmm, maybe I need to sudo? So I use "sudo su -" and try again, but now I get the error, "command not found".
The issue was that play-1.2.3 was not in my path for my sudo account. Once sudo(ed) in, I ran export PATH=$PATH:/opt/play-1.2.3 and then I was able to run the play id command. I AM SO SMART SMRT, learning Linux all on my own baby!