tty must be global

diff --git a/frprog.py b/frprog.py
index 41a5385427eb827f264a229bd20e3c562ef71478..0ca52c57de1fd788e5b06f4af00be107e0549c6d 100755 (executable)
--- a/frprog.py
+++ b/frprog.py
@@ -199,6 +199,7 @@ def main(argv=None):
                return 1
 
        print "Initializing serial port..."
+       global tty
        tty = SerialPort(DEVICE, 100, INIT_BAUDRATE)
 
        print "Please press RESET on your board..."