Create Readme for Host

host/README.md

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+This repository contains hardware designs and software for HackRF, a project to
+produce a low cost, open source software radio platform.
+
+![Jawbreaker](https://raw.github.com/mossmann/hackrf/master/doc/jawbreaker.jpeg)
+
+##How to build host software on Windows:
+
+###Prerequisites for cygwin or mingw:
+
+* cmake-2.8.12.1 or more see http://www.cmake.org/cmake/resources/software.html
+* libusbx-1.0.18 or more see http://sourceforge.net/projects/libusbx/files/latest/download?source=files
+* Install Windows driver for AirSpy hardware or use Zadig see http://sourceforge.net/projects/libwdi/files/zadig
+  - If you want to use Zadig  select AirSpy USB device and just install/replace it with WinUSB driver.
+
+>**Note for Windows build:**
+ You shall always execute airspy_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 airspy_rx the Ctrl C(abort) will not stop correctly and will corrupt the file.
+
+###For Cygwin:
+
+`cd host`
+
+`mkdir build`
+
+`cd build`
+
+`cmake ../ -G "Unix Makefiles" -DCMAKE_LEGACY_CYGWIN_WIN32=1 -DLIBUSB_INCLUDE_DIR=/usr/local/include/libusb-1.0/`
+
+`make`
+
+`make install`
+
+
+###For MinGW:
+
+`cd host`
+
+`mkdir build`
+
+`cd build`
+
+Normal version:
+
+* 
+`cmake ../ -G "MSYS Makefiles" -DLIBUSB_INCLUDE_DIR=/usr/local/include/libusb-1.0/`
+
+Debug version:
+
+* 
+`cmake ../ -G "MSYS Makefiles" -DCMAKE_BUILD_TYPE=Debug -DLIBUSB_INCLUDE_DIR=/usr/local/include/libusb-1.0/`
+
+`make`
+
+`make install`
+
+
+##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`
+
+
+###Build host software on Linux:
+
+`cd host`
+
+`mkdir build`
+
+`cd build`
+
+`cmake ../ -DINSTALL_UDEV_RULES=ON`
+
+`make`
+
+`sudo make install`
+
+`sudo ldconfig`
+
+##Clean CMake temporary files/dirs:
+
+`cd host/build`
+
+`rm -rf *`
+
+
+principal author: Michael Ossmann <mike@ossmann.com>
+
+http://greatscottgadgets.com/hackrf/