X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=README.Windows;h=6c616f38accf41688276baa60095ae2239ef87e6;hp=61a712aba7f119f9635bf6f90b8fb62c8e8111df;hb=8b9560349fb78887d8e353e20b303966d9ac2d1b;hpb=005d85d56cfed72326f73e93eae105840b21645d

diff --git a/README.Windows b/README.Windows
index 61a712aba7..6c616f38ac 100644
--- a/README.Windows
+++ b/README.Windows
@@ -7,6 +7,9 @@ recommended as it doesn't provide enough C99 compatibility).
 Alternatively, one can cross-compile it using MinGW-w64 on a *nix
 host. See README for the generic instructions.
 
+Also, the MSYS2 project provides both ready-made binaries and an easy
+way to self-compile from their software repository out of the box.
+
 Native MinGW-w64/MSYS compilation
 -----------------------------
 
@@ -22,13 +25,36 @@ installation.
 USB adapters
 ------------
 
-You usually need to have WinUSB.sys (or libusbK.sys) driver installed
-for a USB-based adapter. Some vendor software (e.g. for ST-LINKv2)
-does it on its own. For the other cases the easiest way to assign
-WinUSB to a device is to use the latest Zadig installer:
+For the adapters that use a HID-based protocol, e.g. CMSIS-DAP, you do
+not need to perform any additional configuration.
+
+For all the others you usually need to have WinUSB.sys (or
+libusbK.sys) driver installed. Some vendor software (e.g. for
+ST-LINKv2) does it on its own. For the other cases the easiest way to
+assign WinUSB to a device is to use the latest Zadig installer:
 
   http://zadig.akeo.ie
 
+When using a composite USB device, it's often necessary to assign
+WinUSB.sys to the composite parent instead of the specific
+interface. To do that one needs to activate an advanced option in the
+Zadig installer.
+
 For the old drivers that use libusb-0.1 API you might need to link
 against libusb-win32 headers and install the corresponding driver with
 Zadig.
+
+If you need to use the same adapter with other applications that may
+require another driver, a solution for Windows Vista and above is to
+activate the IgnoreHWSerNum registry setting for the USB device.
+
+That setting forces Windows to associate the driver per port instead of
+per serial number, the same behaviour as when the device does not contain
+a serial number. So different drivers can be installed for the adapter on
+different ports and you just need to plug the adapter into the correct
+port depending on which application to use.
+
+For more information, see:
+
+  http://msdn.microsoft.com/en-us/library/windows/hardware/jj649944(v=vs.85).aspx
+  http://www.ftdichip.com/Support/Knowledgebase/index.html?ignorehardwareserialnumber.htm