Thread: Fusion Brain program for Linux

Using malcom2073's lib, I created a simple daemon that exposes a DBus interface to the fusion brain.

This should (IMHO), be used in place of direct access to the library for most applications. DBus's IPC allows you to code in any language that has DBus bindings: Python, C++, C, C#, Java, Ruby, etc, etc, etc rather than just pure C++ which is what the library is written in.

This is developed for the OpenICE platform under the GPL license.

To install, run qmake, make. Copy FusionBrain.conf to /etc/dbus-1/system.d/. Run as root.

See fbddbus.xml for information on the DBus methods and signals available.

Have fun!
fbd.tar.gz

I do not have Fusion Brain, but still... SWEEEEEEEEETES!

Fantastic work guys!

As soon as I learned about the Fusion Brain I ordered one and it arrived today. I couldn't resist giving it a whirl so I downloaded/built Malcom's FB package and giggled like a little schoolgirl as I toggled LEDs

I then downloaded/built Kev's fbd and ran it per the instructions above. I know next to nothing about dbus so figured a quick commandline test was a good start, but I ran into problems. It's past my bedtime (I'm getting old) so I figured I'd ask in case there was a quick answer. Using dbus-send, I'm not sure how to toggle one of the digital outputs. I have #1 turned on right now so I tried to turn it off with

cgalpin@jaunty:~/fbd$ dbus-send --session --print-reply --dest="org.openice.fbd" /org/openice/fbd org.openice.fbd.fusionbrain.SetSingleOutput int16:1 boolean:false
Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.openice.fbd was not provided by any .service files
cgalpin@jaunty:~/fbd$ dbus-send --session --print-reply --dest="org.openice.fbd.fusionbrain" /org/openice/fbd org.openice.fbd.fusionbrain.SetSingleOutput int16:1 boolean:false
Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.openice.fbd.fusionbrain was not provided by any .service files

As you can see, it doesn't seem to understand the destinations. Any ideas? I tried a few other things and perhaps made progress with

cgalpin@jaunty:~/fbd$ dbus-send --system --print-reply --dest="org.openice.fbd" /org/openice/fbd org.openice.fbd.fusionbrain.SetSingleOutput int16:1 boolean:false
Error org.freedesktop.DBus.Error.UnknownMethod: No such method 'SetSingleOutput' in interface 'org.openice.fbd.fusionbrain' at object path '/org/openice/fbd' (signature 'nb')

Also, I first build FB using libusb-1.0-0 since it was newer, and other than a #include and a makefile tweak it built and ran fine. When I went to build fbd, there were a boatload of differences to both FB, but also the version of usb. I started making the changes from usb to libusb but then started finding functions that didn't seem to have libusb analogs and gave up and just installed libusb-0.1-4 and libusb-dev and it built fine unmodified. In a nutshell, what is the difference between these versions?

Anyway, just wanted to say thanks and I look forward to being able to get this working, and take some time to contribute myself.

charles

Originally Posted by cgalpin

Fantastic work guys!

As soon as I learned about the Fusion Brain I ordered one and it arrived today. I couldn't resist giving it a whirl so I downloaded/built Malcom's FB package and giggled like a little schoolgirl as I toggled LEDs

I then downloaded/built Kev's fbd and ran it per the instructions above. I know next to nothing about dbus so figured a quick commandline test was a good start, but I ran into problems. It's past my bedtime (I'm getting old) so I figured I'd ask in case there was a quick answer. Using dbus-send, I'm not sure how to toggle one of the digital outputs. I have #1 turned on right now so I tried to turn it off with

cgalpin@jaunty:~/fbd$ dbus-send --session --print-reply --dest="org.openice.fbd" /org/openice/fbd org.openice.fbd.fusionbrain.SetSingleOutput int16:1 boolean:false
Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.openice.fbd was not provided by any .service files
cgalpin@jaunty:~/fbd$ dbus-send --session --print-reply --dest="org.openice.fbd.fusionbrain" /org/openice/fbd org.openice.fbd.fusionbrain.SetSingleOutput int16:1 boolean:false
Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.openice.fbd.fusionbrain was not provided by any .service files

As you can see, it doesn't seem to understand the destinations. Any ideas? I tried a few other things and perhaps made progress with

cgalpin@jaunty:~/fbd$ dbus-send --system --print-reply --dest="org.openice.fbd" /org/openice/fbd org.openice.fbd.fusionbrain.SetSingleOutput int16:1 boolean:false
Error org.freedesktop.DBus.Error.UnknownMethod: No such method 'SetSingleOutput' in interface 'org.openice.fbd.fusionbrain' at object path '/org/openice/fbd' (signature 'nb')

Also, I first build FB using libusb-1.0-0 since it was newer, and other than a #include and a makefile tweak it built and ran fine. When I went to build fbd, there were a boatload of differences to both FB, but also the version of usb. I started making the changes from usb to libusb but then started finding functions that didn't seem to have libusb analogs and gave up and just installed libusb-0.1-4 and libusb-dev and it built fine unmodified. In a nutshell, what is the difference between these versions?

Anyway, just wanted to say thanks and I look forward to being able to get this working, and take some time to contribute myself.

charles

I would use (and do use) a utility like qdbusviewer to test fbd. You can use it to browse the system bus to find the org.openice.fbd service and even test out the different functions. If it isn't running there, be sure to copy the fusionbrain.conf to the right dbus directory and restart dbus (or the entire machine). By default, dbus will not allow services to register on the system bus.

hope that helps.

Originally Posted by cgalpin

Also, I first build FB using libusb-1.0-0 since it was newer, and other than a #include and a makefile tweak it built and ran fine. When I went to build fbd, there were a boatload of differences to both FB, but also the version of usb. I started making the changes from usb to libusb but then started finding functions that didn't seem to have libusb analogs and gave up and just installed libusb-0.1-4 and libusb-dev and it built fine unmodified. In a nutshell, what is the difference between these versions?

Apparently 0.1 was developed by one person and stabilized, then a second person took over and re-did it and it became 1.0. I used 0.1 because most distros have binaries for 0.1, but not as many have them for 1.0.

Ok 0.1 sounds good. What about the differences between the FB versions used in the FB package and the fbd one? I'd be happy to help get these checked in somewhere and versioned to help keep track of things.

Kev, thanks for the pointer to qdbusviewer. It at least let me verify everything was working (other than my dbus-send attempt). It turns out I was using int16 instead of int32 which made the method signature not match (and the error message is slightly misleading so it took me a while to figure it out )

Anyway, this is a working test from the commandline

dbus-send --system --print-reply --dest="org.openice.fbd" /org/openice/fbd org.openice.fbd.fusionbrain.SetSingleOutput int32:1 boolean:true

I also got the same hello world style test working from apache/php which is something bugbyte wants to do. I'll document it in his linux newbie thread, but I feel like we need to wiki this kind of thing to make it easier for others to start using this stuff. I assume openice.org is the preferred place?

Originally Posted by cgalpin

Ok 0.1 sounds good. What about the differences between the FB versions used in the FB package and the fbd one? I'd be happy to help get these checked in somewhere and versioned to help keep track of things.

Kev, thanks for the pointer to qdbusviewer. It at least let me verify everything was working (other than my dbus-send attempt). It turns out I was using int16 instead of int32 which made the method signature not match (and the error message is slightly misleading so it took me a while to figure it out )

Anyway, this is a working test from the commandline

dbus-send --system --print-reply --dest="org.openice.fbd" /org/openice/fbd org.openice.fbd.fusionbrain.SetSingleOutput int32:1 boolean:true

I also got the same hello world style test working from apache/php which is something bugbyte wants to do. I'll document it in his linux newbie thread, but I feel like we need to wiki this kind of thing to make it easier for others to start using this stuff. I assume openice.org is the preferred place?

yep, openice.org would be the place. I've also checked this into the linuxice svn repository: https://linuxice.svn.sourceforge.net...uxice/packages

Hopefully we can get some packages made so it can be included in the LinuxICE2 testing.

much happiness

Malcom, do you have this checked in somewhere or are you working out of the fbd kev checked in (https://linuxice.svn.sourceforge.net...e/packages/fbd )? I'm interested in getting the latest version to see if there are any changes related to getting analog values.

Thanks,
charles