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Adrian Chadd 0961a76f26 Fix libusb usage for at least freebsd around the worker thread and transfer cancellation 
On at least freebsd-13 trying to cancel a transfer whilst the libusb thread
is not running results in the transfers not completing cancellation.
The next time they're attempted to be re-added the libusb code thinks
they're still active, and returns BUSY on the buffers.

This causes gqrx to error out when one makes DSP changes or stops/starts it.
You have to restart gqrx to fix it.

After digging into it a bit, the libusb code expects that you're actively
running the main loop in order to have some deferred actions run in the
context of said main loop thread.  This includes processing cancelled
transfers - the callbacks have to be run (if they exist) before the
buffers are properly cancelled and have their tracking metadata (a couple of
private pointers and state) removed from inside of libusb.

This patch does the following:

* separate out adding and cancelling transfers from the libusb worker thread
  create/destroy path
* create the libusb worker thread when opening the device
* destroy the libusb worker thread when closing the device
* only add and cancel transfers when starting and stopping tx/rx
* handle cancelled transfers gracefully in the USB callback

Whilst here, also make the libusb device memory zeroed by using
calloc instead of malloc.

This fixes all of the weird libusb related buffer management problems
on FreeBSD.
2020-11-08 21:38:39 -08:00
..
cmake
hackrf_sweep on Windows
2017-02-14 01:43:14 -05:00
hackrf-tools
Merge pull request #716 from Jakub6/master
2020-07-26 07:39:17 -06:00
libhackrf
Fix libusb usage for at least freebsd around the worker thread and transfer cancellation
2020-11-08 21:38:39 -08:00
CMakeLists.txt
Don't require a C++ compiler
2018-03-31 22:50:37 +02:00
README.md
Fix a few typos in README for host tools
2017-09-01 22:45:24 +02:00

README.md

This repository contains host software (Linux/Windows) for HackRF, a project to produce a low cost, open source software radio platform.

How to build the host software on Linux:

Prerequisites for Linux (Debian/Ubuntu):

sudo apt-get install build-essential cmake libusb-1.0-0-dev pkg-config libfftw3-dev

Build host software on Linux:

mkdir host/build
cd host/build
cmake ..
make
sudo make install
sudo ldconfig

By default this will attempt to install an udev rule to /etc/udev/rules.d to provide the usb or plugdev group access to HackRF. If your setup requires the udev rule to be installed elsewhere you can modify the path with -DUDEV_RULES_PATH=/path/to/udev.

Note: The udev rule is not installed by default for PyBOMBS installs as they do not ususally get installed with root privileges.

Clean CMake temporary files/dirs:

cd host/build
rm -rf *

How to build host software on Windows:

Prerequisites for Cygwin, MinGW, or Visual Studio:

Note for Windows build: You shall always execute hackrf-tools from Windows command shell and not from Cygwin or MinGW shell because on Cygwin/MinGW Ctrl C is not managed correctly and especially for hackrf_transfer the Ctrl C(abort) will not stop correctly and will corrupt the file.

For Cygwin:

mkdir host/build
cd host/build
cmake ../ -G "Unix Makefiles" -DCMAKE_LEGACY_CYGWIN_WIN32=1 -DLIBUSB_INCLUDE_DIR=/usr/local/include/libusb-1.0/
make
make install

For MinGW:

mkdir host/build
cd host/build
cmake ../ -G "MSYS Makefiles" -DLIBUSB_INCLUDE_DIR=/usr/local/include/libusb-1.0/
make
make install

For Visual Studio 2015 x64

Create library definition for MSVC to link to C:\fftw-3.3.5-dll64> lib /machine:x64 /def:libfftw3f-3.def

c:\hackrf\host\build> cmake ../ -G "Visual Studio 14 2015 Win64" \
-DLIBUSB_INCLUDE_DIR=c:\libusb-1.0.21\libusb \
-DLIBUSB_LIBRARIES=c:\libusb-1.0.21\MS64\dll\lib\libusb-1.0.lib \
-DTHREADS_PTHREADS_INCLUDE_DIR=c:\pthreads-w32-2-9-1-release\Pre-built.2\include \
-DTHREADS_PTHREADS_WIN32_LIBRARY=c:\pthreads-w32-2-9-1-release\Pre-built.2\lib\x64\pthreadVC2.lib \
-DFFTW_INCLUDES=C:\fftw-3.3.5-dll64 \
-DFFTW_LIBRARIES=C:\fftw-3.3.5-dll64\libfftw3f-3.lib

CMake will produce a solution file named HackRF.sln and a series of project files which can be built with msbuild as follows: c:\hackrf\host\build> msbuild HackRF.sln

How to build host the software on FreeBSD

You can use the binary package: # pkg install hackrf

You can build and install from ports:

# cd /usr/ports/comms/hackrf
# make install

principal author: Michael Ossmann mike@ossmann.com

http://greatscottgadgets.com/hackrf/