libusbmuxd | A client library to multiplex connections from and to iOS devices | iOS library
kandi X-RAY | libusbmuxd Summary
kandi X-RAY | libusbmuxd Summary
A client library to multiplex connections from and to iOS devices
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QUESTION
Writing some C code for USB mouse.
More specifically writing configuration and information to mouse like poll, sensitivity, button actions, colors (light), tactile alters, OLED etc.
Started out with this old article where libhid
is recommended over libusb
.
Looking at libhid it seems to since have died. Last commit on that project is from 2012, - and it is C++. But I found some links saying one should go over to hidapi
.
However, hidapi also seems to be fairly dead. Last commit from 2016. Or perhaps it is simply stable?
It could look like one is better off using libusb
after all. Starting out with a 15 year old article - it is not that much of a stretch.
Question is if I am missing something? Is libusb
the way to go?
Have done some quick tests with libusb-1.0.0-dev
ANSWER
Answered 2020-Apr-09 at 18:19libusb recommend using hidapi for USB HID devices. hidapi can use a different backend depending on the OS, e.g. hid.dll in Windows, either hidraw or libusb in Linux, so it's using native USB drivers.
Be aware though that hidapi doesn't give you the same level of control over the packets you send. It's higher level than libusb and some of the parameters that it uses for requests are fixed (e.g. bRequest value).
hidapi is also not currently maintained, if that is a concern to you.
Update: As of June 4th 2019, hidapi was moved to libusb/hidapi and is now being actively maintained again.
Personally I'd say use hidapi if it works fine for your project, but if the device's protocol doesn't follow the HID standard then you'll run into trouble and will probably need the control that libusb gives you.
QUESTION
Hello I am trying to use TensorFlow for C/C++. Currently I am trying to get the basic program they offer in their installation instructions to compile.
https://www.tensorflow.org/install/install_c
I am working on x86_64 machine running Ubuntu. I believe I installed the library properly. When I list the directories in the /usr/local/ folder, I see tensorflow in there.
$: ls /usr/local/include/
tensorflow
However, when I attempt the compile the basic program they offer, it fails with both gcc and g++
$: gcc -o test hello_tf.cpp
/tmp/cczK3WZs.o: In function `main':
hello_tf.cpp:(.text+0x5): undefined reference to `TF_Version'
collect2: error: ld returned 1 exit status
$: g++ -o test hello_tf.cpp
/tmp/ccl7FitR.o: In function `main':
hello_tf.cpp:(.text+0x5): undefined reference to `TF_Version'
collect2: error: ld returned 1 exit status
Everything went smoothly on install except when I ran ldconfig as suggested for installing into a system directory.
$ sudo ldconfig /sbin/ldconfig.real:
/usr/lib/libusbredirparser.so.1 is not a symbolic link
/sbin/ldconfig.real: /usr/lib/libid3tag.so.0 is not a symbolic link
/sbin/ldconfig.real: /usr/lib/libusbg.so.0 is not a symbolic link
/sbin/ldconfig.real: /usr/lib/libusbmuxd.so.2 is not a symbolic link
/sbin/ldconfig.real: /usr/lib/libmtp.so.9 is not a symbolic link
/sbin/ldconfig.real: /usr/lib/libmad.so.0 is not a symbolic link
/sbin/ldconfig.real: /usr/lib/libusb-1.0.so.0 is not a symbolic link
/sbin/ldconfig.real: /usr/lib/libusbredirhost.so.1 is not a symbolic link
Nevertheless, these files do not seem like they should affect the compilation of the program in question. When I run the troubleshooting compilation command, it seems to work. I am not sure why this is
...g++ -I/usr/local/include -L/usr/local/lib hello_tf.cpp -ltensorflow
ANSWER
Answered 2017-Nov-20 at 11:39Your hello_tf.cpp file is compiled to something called object. Because inside of your program you called functions names compiler could not find inside your code linker needs to look somewhere else to find them to allow object to call the code of those functions. Option L (-L/usr/local/lib) tells it in which directories it should look for and l (-l tensorflow) tells it which modules it should check. Remember that -l should appear AFTER translation unit (hello_tf.cpp).
You should do a little bit of research before posting question here. Page you linked substitutes "-L" with export LIBRARY_PATH ... but I don't think your program will ever compile without -l.
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