add short note about cleaning cable locks

[usb-driver] / README

diff --git a/README b/README
index 23265b8b8df554f0e805754a07042d8cacfde2ce..9091cc4ffadced6d6da4b858de5da33a1435465a 100644 (file)
--- a/README
+++ b/README
@@ -21,6 +21,7 @@ the following software:
  * 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
@@ -132,3 +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