add short note about cleaning cable locks

[usb-driver] / README

diff --git a/README b/README
index 330c3a3223b895f3bf1b8e63670c9f1e627ddf05..9091cc4ffadced6d6da4b858de5da33a1435465a 100644 (file)
--- a/README
+++ b/README
@@ -17,15 +17,18 @@ the following software:
  * ChipScope 9.1.03i
  * ChipScope 9.1.02i
  * ChipScope 8.2.04i
+ * EDK 9.1.02i
  * EDK 9.1.01i
  * EDK 8.2.02i
  * EDK 8.1.02i
+ * Synplicity Identify
 
 In addition to the XILINX USB and parallel cables, devices based on the FTDI
 2232 serial converter chip are also experimentally supported. This includes
 devices like the Amontec JTAGkey(-Tiny).
 
-Build the library by calling `make'.
+Build the library by calling `make'. If you are on a 64 bit system but want
+to build a 32 bit library, run `make lib32' instead.
 
 To use this library you have to preload the library before starting impact:
 
@@ -130,3 +133,12 @@ To set-up the device:
 
 The support for FTDI 2232 based devices is experimental and they are currently
 significantly slower than the other supported cables.
+
+
+Locked cables
+=============
+
+If you get the message 'The cable is being used by another application.' from
+impact, try running the following command:
+
+echo -e 'cleancablelock\nexit' | impact -batch