Using ACR122u on Windows

First you need to install Libnfc:
  1. Installing TDM-GCC MinGW CompilerGoto and download the TDM-GCC MinGW Compiler.
    For example: tdm64-gcc-4.7.1-3.exe
    More information about this compiler:
    Note: MinGW = Minimalist GNU for Windows
  2. Double click the executable and press the Create button.TDM-GCC setup
  3. Select “MinGW-w64/TDM64 Experimental (32-bit and 64-bit)” and press Next button.Note:
    You need to install this version instead of “MinGW/TDM (32 bit)”.
    The “MinGW-w64/TDM64 Experimental” version will run on 32-bit and 64-bit operating systems.Select MinGW-w64/TDM64 Experimental( 32-bit and 64-bit) edition
  4. Select TDM-GCC installation directory, for example C:\tools\MinGW64 and press Next button.Select TDM-GCC installation directory
  5. Select your nearest TDM-GCC download server and press Next button.Select TDM-GCC download server
  6. Choose “TDM-GCC Recommended, All Packages” and press Install button.Choose TDM-GCC components to be installed
  7. Wait until TDM-GCC is installed and press Next button.Installing TDM-GCC components
  8. Presh Finish button to complete the TDM-GCC setup.Finish the TDM-GCC setupMore information needed about TDM-GCC, read the README-gcc-tdm64.txt file.
  9. Installing libusb-win32Goto and download libusb-win32.
    For example:
    More information about this library:
  10. Download and unzip the file, for example: C:\tools\libusb-win32-bin-
    No further action is required.
  11. Installing PCRE for WindowsGoto and download the PCRE setup wizard (Perl-compatible regular-expression).
    For example: pcre-7.0.exe
    More information about PCRE:
  12. Double click the executable and press the “Next” button.PCRE setup wizard
  13. Accept the agreement and press the “Next” button.PCRE accept agreement
  14. Select PCRE installation directory, for example C:\tools\GnuWin32 and press Next button.PCRE installation location
  15. Select “Full installation” and press Next button.PCRE components
  16. Enter PCRE shortcut in Start menu and press Next button.PCRE shortcut
  17. Select additional tasks to be performed and press Next button.PCRE additional tasks
  18. Press Install button.PCRE install
  19. Press Finish button.PCRE finish
  20. Installing CMakeGoto and download CMake binary distribution for Windows platform (Win32 Installer). CMake is a cross-platform, open-source build system.
    For example: cmake-
  21. Double click the executable and press the “I Agree” button.CMake setup
  22. Select “Add CMake to the system PATH for current user” and press “Next” button.CMake install options
  23. Select CMake installation directory, for example C:\tools\CMake 2.8 and press Next button.Select CMake installation directory
  24. Choose start menu folder and press Install button.Choose start menu folder
  25. Wait until CMake is installed and press Next button.Installing CMake
  26. Presh Finish button to complete the CMake setup.Finish the CMake setup
  27. Installing DoxygenGoto and download doxygen.
    For example: doxygen-1.8.4-setup.exeNote:
    It is not required to install Doxygen.
    If not installed, Doxygen warning messages will be displayed when you configure libnfc using CMake.
    You can ignore these warning messages.
  28. Double click the executable and press the “Next” button.Doxygen setup
  29. Accept the agreement and press the “Next” button.Doxygen accept agreement
  30. Select Doxygen installation directory, for example C:\tools\doxygen and press Next button.Doxygen installation location
  31. Select “Full installation” and press Next button.Doxygen components
  32. Enter Doxygen shortcut in Start menu and press Next button.Doxygen shortcut
  33. Press Install button.Doxygen install
  34. Doxygen is installing.Doxygen is installing
  35. Read Doxygen information and press Next button.Doxygen information
  36. Press Finish button.Doxygen finish
  37. Installing libnfcGoto and download the free Near Field Communication library (libnfc).
    For example: ibnfc-1.7.0-rc7.tar.gzAnd unpack the file.
    For example: C:\tools\libnfc-1.7.0-rc7More information about this library:

  38. Configure libnfcLibnfc currently only supports communication over UART, using any inexpensive USB to UART adapter like the FTDI Tool. Before compiling you will need to configure libnfc to include support for UART and the PN532 chipset.Make the following changes:
    • Due to a bug you will get the error message below when you later use the command “mingw32-make”.C:\libnfc-build\windows\libnfc.rc:25:37: warning: missing terminating ” character [enabled by default] Edit file: C:\tools\libnfc-1.7.0-rc7\CMakeLists.txt Change:MACRO (GET_CURRENT_YEAR RESULT)
      STRING(REGEX REPLACE “.*(..)/(..)/(….).*” “\\3” ${RESULT} ${${RESULT}})


         STRING(REGEX REPLACE “\n” “” ${RESULT} ${${RESULT}})
         STRING(REGEX REPLACE “.*(..)/(..)/(….).*” “\\3” ${RESULT} ${${RESULT}})

    • The default timeouts in the pn532 driver are not long enough and unless you patch the driver, the NFC reader will not show up.
      It is important to wait a time long enough to pass the pn532 wake up sequence, so do send a 0x55, 0x55 followed by some 30 0x00.Edit file: C:\tools\libnfc-1.7.0-rc7\libnfc\drivers\pn532_uart.c Change:const uint8_t pn532_wakeup_preamble[] = { 0x55, 0x55, 0x00, 0x00, 0x00 }; into

      const uint8_t pn532_wakeup_preamble[] = { 0x55, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 

    • If you copy c:\tools\libnfc-1.7.0-rc7\libnfc.conf.sample into c:\toolslibnfc-1.7.0-rc7\libnfc.conf, this file will not be read. Do not copy libnfc.conf.sample. Here is an alternative way.Edit file: C:\tools\libnfc-1.7.0-rc7\libnfc\nfc-internal.c Change:res->allow_intrusive_scan = false; into

      res->allow_intrusive_scan = true; 

  39. Set Windows System PathOpen the Windows “System Properties” window:
    • Press the windows “Start” button
    • Right click Computer
    • Select Properties
    • Click “Advanced system settings” which opens the “System Properties” window and press “Environment Variables…”Windows system properties
    • In the “System variables” subwindow select variable “Path” and press “Edit…” buton.Windows environment variables
    • Edit your System variable “Path”. Add the following paths (if they were not already created) at the end:
      • C:\tools\doxygen\bin;      (Only if you installed Doxygen)
      • C:\tools\MinGW64\bin;
      • C:\tools\MinGW64\x86_64-w64-mingw32\lib32;
      • C:\tools\MinGW64\x86_64-w64-mingw32\include;
      • C:\tools\CMake 2.8\bin;
      • C:\tools\GnuWin32\bin;

      Windows edit system variable PATH

  40. To test if all required software/libraries are installed and the System PATH is set correctly, open a Dos window and type: cmakeYou should see:cmake version
    cmake [options] <path-to-source>
    cmake [options] <path-to-existing-build>
    :See the complete cmake output.
  41. Configure CMake libnfc project
    • Create a folder libnfc-build.
      For example: c:\libnfc-build
    • Open a dos window and goto folder “libnfc-build”.
      Type: cmake-gui .CMake is used to configure and generate build files for software projects.
      The basic steps for configuring a project are as follows:

      • Select the source directory for the project.
        This should contain the CMakeLists.txt files for the project.
        In this tutorial the libnfc source directory is: C:\tools\libnfc-1.7.0-rc7
      • Select the build directory for the project.
        This is the directory where the project will be built.
        It can be the same or a different directory than the source directory.
        For easy clean up, a separate build directory is recommended.
        CMake will create the directory if it does not exists.
        In this tutorial the build directory is: c:\libnfc-buildConfigure CMake libnfc project
      • Once the source and binary directories are selected, it is time to press the Configure button.
        A window will open:

        • Select the “MinGW Makefiles” generator.
        • Select option: Use default native compilers.
        • Press Finish button.

        Select MinGW Makefiles generator

        This will cause CMake to read all of the input files and discover all the variables used by the project. The first time a variable is displayed, it will be in Red. Users should inspect red variables making sure the values are correct.
        For some projects the Configure process can be iterative, so continue to press the Configure button until there are no red entries.

        Errors shown when pressing configure button

        To fix the errors mentioned above:

        • Click on the PCRE_INCLUDE_DIRS value and goto:
        • Click on the PCRE_LIBRARIES value and select file:
        • And press the Configure button again.

        Errors shown when pressing configure button again

        To fix the errors mentioned above:

        • Click on the LIBUSB_INCLUDE_DIRS value and goto:
        • Click on the LIBUSB_LIBRARIES value and select file:
          C:\tools\libusb-win32-bin-\lib\gcc\libusb.a By doing the above, you are building a 32bit application.
          For 64bit system, either 32bit application or 64bit application will work.
          64bit application can not work on 32bit Windows OS.For a 64bit system, you need to use a 64bit driver.
          A 32bit driver will not work under 64 bit system, and vice versa,
          64bit driver will not work under 32bit system.

          • 32bit MinGW GCC
          • 64bit MinGW GCC
            directly link to libusb0.dll or create your own import lib
          • 32bit MSVC (=Microsoft Visual C++)
          • 64bit MSVC
          • 64bit MSVC for IA64
          • Borland C (32bit only)
          • Other compiler, use dynamic
        • And press the Configure button again.

        No errors shown when pressing configure button again

      • Once there are no longer red entries, configure libnfc according to your need.
        In my situation I will later connect an Adafruit PN532 RFID/NFC Shield to an FTDI board to a laptop running Windows Vista.
        Because libnfc currently only supports communication over UART I make the final changes:

        • Set CMAKE_BUILD_TYPE=Debug
        • Set CMAKE_INSTALL_PREFIX=C:/tools/libnfc-1.7.0-rc7
        • Set all LIBNFC_DRIVER_NNN=OFF
        • Set LIBNFC_SYSCONFDIR=C:/tools/libnfc-1.7.0-rc7/config

        Press Generate button

        Click the Configure button and then the Generate button.
        This will create files to the build directory: c:\libnfc-build

    • Build windows executable files and libnfc.dll with mingw32-make
      • Goto folder C:\libnfc-build and type: mingw32-makemingw32-make creates executablesSee the complete mingw32-make outputExecutables (.exe) are created and can be found in the folders:C:\libnfc-build\utils
        • nfc-emulate-forum-tag4.exe
        • nfc-list.exe
        • nfc-mfclassic.exe
        • nfc-mfultralight.exe
        • nfc-read-forum-tag3.exe
        • nfc-relay-picc.exe
        • nfc-scan-device.exe


        • nfc-anticol.exe
        • nfc-dep-initiator.exe
        • nfc-dep-target.exe
        • nfc-emulate-forum-tag2.exe
        • nfc-emulate-tag.exe
        • nfc-emulate-uid.exe
        • nfc-mfsetuid.exe
        • nfc-poll.exe
        • nfc-relay.exe

        File C:\libnfc-build\libnfc\libnfc.dll is also created.

    • Copy libnfc.dll to C:\Windows\System32If you run the above mentioned executables, for example:C:\libnfc-build\utils\nfc-list.exethe following error message is shown:This application has failed to start because libnfc.dll was not found. Re-installing the application may fix this problem. 

      libnfc.dll not found

      To fix this error copy the generated C:\libnfc-build\libnfc\libnfc.dll to
      Do this each time if you use the command “mingw32-make”.

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