add short note about cleaning cable locks

[usb-driver] / README

diff --git a/README b/README
index a86a46ac536adc098c8c9cebff6e3693d9b0fb68..9091cc4ffadced6d6da4b858de5da33a1435465a 100644 (file)
--- a/README
+++ b/README
@@ -133,3 +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