Merge branch 'python3_work'

5 files changed, 170 insertions, 162 deletions

diff --git a/host/utils/usrp2_card_burner.py b/host/utils/usrp2_card_burner.py
index 1db5e59ce..741c7e3e1 100755
--- a/host/utils/usrp2_card_burner.py
+++ b/host/utils/usrp2_card_burner.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright 2010 Ettus Research LLC
+# Copyright 2010-2011 Ettus Research LLC
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -19,7 +19,11 @@
 import platform
 import tempfile
 import subprocess
-import urllib
+try:
+    import urllib.request
+except ImportError:
+    import urllib
+    urllib.request = urllib
 import optparse
 import math
 import os
@@ -46,16 +50,16 @@ def command(*args):
         stderr=subprocess.STDOUT,
     )
     ret = p.wait()
-    verbose = p.stdout.read()
-    if ret != 0: raise Exception, verbose
+    verbose = p.stdout.read().decode('ascii')
+    if ret != 0: raise Exception(verbose)
     return verbose
 
 def get_dd_path():
     if platform.system() == 'Windows':
         dd_path = os.path.join(tempfile.gettempdir(), 'dd.exe')
         if not os.path.exists(dd_path):
-            print 'Downloading dd.exe to %s'%dd_path
-            dd_bin = urllib.urlopen('http://www.ettus.com/downloads/dd.exe').read()
+            print('Downloading dd.exe to %s'%dd_path)
+            dd_bin = urllib.request.urlopen('http://www.ettus.com/downloads/dd.exe').read()
             open(dd_path, 'wb').write(dd_bin)
         return dd_path
     return 'dd'
@@ -97,14 +101,14 @@ def get_raw_device_hints():
                 if key in info: return extract_info_value(info, key)
             return info.splitlines()[0].strip()
 
-        return sorted(set(map(extract_info_name, filter(is_info_valid, get_info_list(command(get_dd_path(), '--list'))))))
+        return sorted(set(map(extract_info_name, list(filter(is_info_valid, get_info_list(command(get_dd_path(), '--list')))))))
 
     ####################################################################
     # Platform Linux: parse procfs /proc/partitions
     ####################################################################
     if platform.system() == 'Linux':
         devs = list()
-        try: output = open('/proc/partitions', 'r').read()
+        try: output = open('/proc/partitions', 'r').read().decode('ascii')
         except: return devs
         for line in output.splitlines():
             try:
@@ -120,15 +124,15 @@ def get_raw_device_hints():
     # Platform Mac OS X: parse diskutil list and info commands
     ####################################################################
     if platform.system() == 'Darwin':
-        devs = map(lambda d: d.split()[0], filter(lambda l: l.startswith('/dev'), command('diskutil', 'list').splitlines()))
+        devs = [d.split()[0] for d in [l for l in command('diskutil', 'list').splitlines() if l.startswith('/dev')]]
         def output_to_info(output):
-            return dict([map(str.strip, pair.lower().split(':')) for pair in filter(lambda l: ':' in l, output.splitlines())])
+            return dict([list(map(str.strip, pair.lower().split(':'))) for pair in [l for l in output.splitlines() if ':' in l]])
         def is_dev_valid(dev):
             info = output_to_info(command('diskutil', 'info', dev))
             try:
-                if info.has_key('internal'): assert info['internal'] == 'no'
-                if info.has_key('ejectable'): assert info['ejectable'] == 'yes'
-                if info.has_key('total size'):
+                if 'internal' in info: assert info['internal'] == 'no'
+                if 'ejectable' in info: assert info['ejectable'] == 'yes'
+                if 'total size' in info:
                     size_match = re.match('^.*\((\d+)\s*bytes\).*$', info['total size'])
                     if size_match: assert int(size_match.groups()[0]) <= MAX_SD_CARD_SIZE
                 return True
@@ -175,8 +179,8 @@ def write_image(image_file, device_file, offset):
     img_data = open(image_file, 'rb').read()
     count = int_ceil_div(len(img_data), SECTOR_SIZE)
     pad_len = SECTOR_SIZE*count - len(img_data)
-    pad_str = ''.join([chr(0)]*pad_len) #zero-padding
-    open(tmp_file, 'wb').write(img_data + pad_str)
+    padding = bytes(b'\x00')*pad_len #zero-padding
+    open(tmp_file, 'wb').write(img_data + padding)
 
     #execute a dd subprocess
     verbose = command(
@@ -196,7 +200,7 @@ def write_image(image_file, device_file, offset):
 
 def write_and_verify(image_file, device_file, offset):
     if os.path.getsize(image_file) > MAX_FILE_SIZE:
-        raise Exception, 'Image file larger than %d bytes!'%MAX_FILE_SIZE
+        raise Exception('Image file larger than %d bytes!'%MAX_FILE_SIZE)
     return '%s\n%s'%(
         write_image(
             image_file=image_file,
@@ -231,8 +235,8 @@ def get_options():
     (options, args) = parser.parse_args()
 
     if options.list:
-        print 'Possible raw devices:'
-        print '  ' + '\n  '.join(get_raw_device_hints())
+        print('Possible raw devices:')
+        print('  ' + '\n  '.join(get_raw_device_hints()))
         exit()
 
     return options
@@ -242,5 +246,5 @@ def get_options():
 ########################################################################
 if __name__=='__main__':
     options = get_options()
-    if not options.dev: raise Exception, 'no raw device path specified'
-    print burn_sd_card(dev=options.dev, fw=options.fw, fpga=options.fpga)
+    if not options.dev: raise Exception('no raw device path specified')
+    print(burn_sd_card(dev=options.dev, fw=options.fw, fpga=options.fpga))
diff --git a/host/utils/usrp2_card_burner_gui.py b/host/utils/usrp2_card_burner_gui.py
index 58b7a514a..2941629b9 100755
--- a/host/utils/usrp2_card_burner_gui.py
+++ b/host/utils/usrp2_card_burner_gui.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright 2010 Ettus Research LLC
+# Copyright 2010-2011 Ettus Research LLC
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -17,10 +17,17 @@
 #
 
 import usrp2_card_burner #import implementation
-import Tkinter, tkFileDialog, tkFont, tkMessageBox
+try:
+    import tkinter, tkinter.filedialog, tkinter.font, tkinter.messagebox
+except ImportError:
+    import tkFileDialog, tkFont, tkMessageBox
+    import Tkinter as tkinter
+    tkinter.filedialog = tkFileDialog
+    tkinter.font = tkFont
+    tkinter.messagebox = tkMessageBox
 import os
 
-class BinFileEntry(Tkinter.Frame):
+class BinFileEntry(tkinter.Frame):
     """
     Simple file entry widget for getting the file path of bin files.
     Combines a label, entry, and button with file dialog callback.
@@ -28,15 +35,15 @@ class BinFileEntry(Tkinter.Frame):
 
     def __init__(self, root, what, def_path=''):
         self._what = what
-        Tkinter.Frame.__init__(self, root)
-        Tkinter.Label(self, text=what+":").pack(side=Tkinter.LEFT)
-        self._entry = Tkinter.Entry(self, width=50)
-        self._entry.insert(Tkinter.END, def_path)
-        self._entry.pack(side=Tkinter.LEFT)
-        Tkinter.Button(self, text="...", command=self._button_cb).pack(side=Tkinter.LEFT)
+        tkinter.Frame.__init__(self, root)
+        tkinter.Label(self, text=what+":").pack(side=tkinter.LEFT)
+        self._entry = tkinter.Entry(self, width=50)
+        self._entry.insert(tkinter.END, def_path)
+        self._entry.pack(side=tkinter.LEFT)
+        tkinter.Button(self, text="...", command=self._button_cb).pack(side=tkinter.LEFT)
 
     def _button_cb(self):
-        filename = tkFileDialog.askopenfilename(
+        filename = tkinter.filedialog.askopenfilename(
             parent=self,
             filetypes=[('bin files', '*.bin'), ('all files', '*.*')],
             title="Select bin file for %s"%self._what,
@@ -45,65 +52,65 @@ class BinFileEntry(Tkinter.Frame):
 
         # open file on your own
         if filename:
-            self._entry.delete(0, Tkinter.END)
+            self._entry.delete(0, tkinter.END)
             self._entry.insert(0, filename)
 
     def get_filename(self):
         return self._entry.get()
 
-class DeviceEntryWidget(Tkinter.Frame):
+class DeviceEntryWidget(tkinter.Frame):
     """
     Simple entry widget for getting the raw device name.
     Combines a label, entry, and helpful text box with hints.
     """
 
     def __init__(self, root, text=''):
-        Tkinter.Frame.__init__(self, root)
+        tkinter.Frame.__init__(self, root)
 
-        Tkinter.Button(self, text="Rescan for Devices", command=self._reload_cb).pack()
+        tkinter.Button(self, text="Rescan for Devices", command=self._reload_cb).pack()
 
-        self._hints = Tkinter.Listbox(self)
+        self._hints = tkinter.Listbox(self)
         self._hints.bind("<<ListboxSelect>>", self._listbox_cb)
         self._reload_cb()
-        self._hints.pack(expand=Tkinter.YES, fill=Tkinter.X)
+        self._hints.pack(expand=tkinter.YES, fill=tkinter.X)
 
-        frame = Tkinter.Frame(self)
+        frame = tkinter.Frame(self)
         frame.pack()
 
-        Tkinter.Label(frame, text="Raw Device:").pack(side=Tkinter.LEFT)
-        self._entry = Tkinter.Entry(frame, width=50)
-        self._entry.insert(Tkinter.END, text)
-        self._entry.pack(side=Tkinter.LEFT)
+        tkinter.Label(frame, text="Raw Device:").pack(side=tkinter.LEFT)
+        self._entry = tkinter.Entry(frame, width=50)
+        self._entry.insert(tkinter.END, text)
+        self._entry.pack(side=tkinter.LEFT)
 
     def _reload_cb(self):
-        self._hints.delete(0, Tkinter.END)
+        self._hints.delete(0, tkinter.END)
         for hint in usrp2_card_burner.get_raw_device_hints():
-            self._hints.insert(Tkinter.END, hint)
+            self._hints.insert(tkinter.END, hint)
 
     def _listbox_cb(self, event):
         try:
             sel = self._hints.get(self._hints.curselection()[0])
-            self._entry.delete(0, Tkinter.END)
+            self._entry.delete(0, tkinter.END)
             self._entry.insert(0, sel)
-        except Exception, e: print e
+        except Exception as e: print(e)
 
     def get_devname(self):
         return self._entry.get()
 
-class SectionLabel(Tkinter.Label):
+class SectionLabel(tkinter.Label):
     """
     Make a text label with bold font.
     """
 
     def __init__(self, root, text):
-        Tkinter.Label.__init__(self, root, text=text)
+        tkinter.Label.__init__(self, root, text=text)
 
         #set the font bold
-        f = tkFont.Font(font=self['font'])
+        f = tkinter.font.Font(font=self['font'])
         f['weight'] = 'bold'
         self['font'] = f.name
 
-class USRP2CardBurnerApp(Tkinter.Frame):
+class USRP2CardBurnerApp(tkinter.Frame):
     """
     The top level gui application for the usrp2 sd card burner.
     Creates entry widgets and button with callback to write images.
@@ -111,7 +118,7 @@ class USRP2CardBurnerApp(Tkinter.Frame):
 
     def __init__(self, root, dev, fw, fpga):
 
-        Tkinter.Frame.__init__(self, root)
+        tkinter.Frame.__init__(self, root)
 
         #pack the file entry widgets
         SectionLabel(self, text="Select Images").pack(pady=5)
@@ -127,8 +134,8 @@ class USRP2CardBurnerApp(Tkinter.Frame):
 
         #the do it button
         SectionLabel(self, text="").pack(pady=5)
-        Tkinter.Label(self, text="Warning! This tool can overwrite your hard drive. Use with caution.").pack()
-        Tkinter.Button(self, text="Burn SD Card", command=self._burn).pack()
+        tkinter.Label(self, text="Warning! This tool can overwrite your hard drive. Use with caution.").pack()
+        tkinter.Button(self, text="Burn SD Card", command=self._burn).pack()
 
     def _burn(self):
         #grab strings from the gui
@@ -138,31 +145,31 @@ class USRP2CardBurnerApp(Tkinter.Frame):
 
         #check input
         if not dev:
-            tkMessageBox.showerror('Error:', 'No device specified!')
+            tkinter.messagebox.showerror('Error:', 'No device specified!')
             return
         if not fw and not fpga:
-            tkMessageBox.showerror('Error:', 'No images specified!')
+            tkinter.messagebox.showerror('Error:', 'No images specified!')
             return
         if fw and not os.path.exists(fw):
-            tkMessageBox.showerror('Error:', 'Firmware image not found!')
+            tkinter.messagebox.showerror('Error:', 'Firmware image not found!')
             return
         if fpga and not os.path.exists(fpga):
-            tkMessageBox.showerror('Error:', 'FPGA image not found!')
+            tkinter.messagebox.showerror('Error:', 'FPGA image not found!')
             return
 
         #burn the sd card
         try:
             verbose = usrp2_card_burner.burn_sd_card(dev=dev, fw=fw, fpga=fpga)
-            tkMessageBox.showinfo('Verbose:', verbose)
-        except Exception, e:
-            tkMessageBox.showerror('Verbose:', 'Error: %s'%str(e))
+            tkinter.messagebox.showinfo('Verbose:', verbose)
+        except Exception as e:
+            tkinter.messagebox.showerror('Verbose:', 'Error: %s'%str(e))
 
 ########################################################################
 # main
 ########################################################################
 if __name__=='__main__':
     options = usrp2_card_burner.get_options()
-    root = Tkinter.Tk()
+    root = tkinter.Tk()
     root.title('USRP2 SD Card Burner')
     USRP2CardBurnerApp(root, dev=options.dev, fw=options.fw, fpga=options.fpga).pack()
     root.mainloop()
diff --git a/host/utils/usrp2_recovery.py b/host/utils/usrp2_recovery.py
index 5654e93d3..c7578d3a0 100755
--- a/host/utils/usrp2_recovery.py
+++ b/host/utils/usrp2_recovery.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright 2010 Ettus Research LLC
+# Copyright 2010-2011 Ettus Research LLC
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -39,7 +39,7 @@ RECOVERY_ETHERTYPE = 0xbeee
 IP_RECOVERY_CODE = 'addr'
 
 def mac_addr_repr_to_binary_string(mac_addr):
-    return ''.join(map(lambda x: chr(int(x, 16)), mac_addr.split(':')))
+    return ''.join([chr(int(x, 16)) for x in mac_addr.split(':')])
 
 if __name__ == '__main__':
     parser = optparse.OptionParser(usage='usage: %prog [options]\n'+__doc__)
@@ -48,12 +48,12 @@ if __name__ == '__main__':
     (options, args) = parser.parse_args()
 
     #create the raw socket
-    print "Opening raw socket on interface:", options.ifc
+    print("Opening raw socket on interface:", options.ifc)
     soc = socket.socket(socket.PF_PACKET, socket.SOCK_RAW)
     soc.bind((options.ifc, RECOVERY_ETHERTYPE))
 
     #create the recovery packet
-    print "Loading packet with ip address:", options.new_ip
+    print("Loading packet with ip address:", options.new_ip)
     packet = struct.pack(
         '!6s6sH4s4s',
         mac_addr_repr_to_binary_string(BCAST_MAC_ADDR),
@@ -63,6 +63,6 @@ if __name__ == '__main__':
         socket.inet_aton(options.new_ip),
     )
 
-    print "Sending packet (%d bytes)"%len(packet)
+    print("Sending packet (%d bytes)"%len(packet))
     soc.send(packet)
-    print "Done"
+    print("Done")
diff --git a/host/utils/usrp_n2xx_net_burner.py b/host/utils/usrp_n2xx_net_burner.py
index c715f3364..0b64f2008 100755
--- a/host/utils/usrp_n2xx_net_burner.py
+++ b/host/utils/usrp_n2xx_net_burner.py
@@ -92,7 +92,7 @@ def unpack_flash_info_fmt(s):
 def unpack_flash_ip_fmt(s):
     return struct.unpack(FLASH_IP_FMT, s) #(proto_ver, pktid, seq, ip_addr)
 
-def pack_flash_args_fmt(proto_ver, pktid, seq, flash_addr, length, data):
+def pack_flash_args_fmt(proto_ver, pktid, seq, flash_addr, length, data=bytes()):
     return struct.pack(FLASH_ARGS_FMT, proto_ver, pktid, seq, flash_addr, length, data)
 
 def pack_flash_info_fmt(proto_ver, pktid, seq, sector_size_bytes, memory_size_bytes):
@@ -100,19 +100,12 @@ def pack_flash_info_fmt(proto_ver, pktid, seq, sector_size_bytes, memory_size_by
 
 def is_valid_fpga_image(fpga_image):
     for i in range(0,63):
-      if ord(fpga_image[i]) == 0xFF:
-        continue
-      if ord(fpga_image[i]) == 0xAA and ord(fpga_image[i+1]) == 0x99:
-        return 1
-
-    return 0
+        if fpga_image[i:i+1] == bytes(b'\xFF'): continue
+        if fpga_image[i:i+2] == bytes(b'\xAA\x99'): return True
+    return False
 
 def is_valid_fw_image(fw_image):
-    for i in range(0,4):
-      if ord(fw_image[i]) != 0x0B:
-          return 0;
-
-    return 1
+    return fw_image[:4] == bytes(b'\x0B\x0B\x0B\x0B')
 
 ########################################################################
 # Burner class, holds a socket and send/recv routines
@@ -135,32 +128,32 @@ class burner_socket(object):
 
     #just here to validate comms
     def init_update(self):
-        out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_OHAI_LOL, seq(), 0, 0, "")
+        out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_OHAI_LOL, seq(), 0, 0)
         try: in_pkt = self.send_and_recv(out_pkt)
-        except socket.timeout: raise Exception, "No response from device"
+        except socket.timeout: raise Exception("No response from device")
         (proto_ver, pktid, rxseq, ip_addr) = unpack_flash_ip_fmt(in_pkt)
         if pktid == update_id_t.USRP2_FW_UPDATE_ID_OHAI_OMG:
-            print "USRP-N2XX found."
+            print("USRP-N2XX found.")
         else:
-            raise Exception, "Invalid reply received from device."
+            raise Exception("Invalid reply received from device.")
 
         #  print "Incoming:\n\tVer: %i\n\tID: %c\n\tSeq: %i\n\tIP: %i\n" % (proto_ver, chr(pktid), rxseq, ip_addr)
 
     def get_flash_info(self):
-        out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_WATS_TEH_FLASH_INFO_LOL, seq(), 0, 0, "")
+        out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_WATS_TEH_FLASH_INFO_LOL, seq(), 0, 0)
         in_pkt = self.send_and_recv(out_pkt)
 
         (proto_ver, pktid, rxseq, sector_size_bytes, memory_size_bytes) = unpack_flash_info_fmt(in_pkt)
 
         if pktid != update_id_t.USRP2_FW_UPDATE_ID_HERES_TEH_FLASH_INFO_OMG:
-            raise Exception, "Invalid reply %c from device." % (chr(pktid))
+            raise Exception("Invalid reply %c from device." % (chr(pktid)))
 
         return (memory_size_bytes, sector_size_bytes)
 
     def burn_fw(self, fw, fpga, reset, safe):
         (flash_size, sector_size) = self.get_flash_info()
 
-        print "Flash size: %i\nSector size: %i\n\n" % (flash_size, sector_size)
+        print("Flash size: %i\nSector size: %i\n\n" % (flash_size, sector_size))
 
         if fpga:
             if safe: image_location = SAFE_FPGA_IMAGE_LOCATION_ADDR
@@ -170,20 +163,18 @@ class burner_socket(object):
             fpga_image = fpga_file.read()
 
             if len(fpga_image) > FPGA_IMAGE_SIZE_BYTES:
-                print "Error: FPGA image file too large."
-                return 0
+                raise Exception("Error: FPGA image file too large.")
 
             if not is_valid_fpga_image(fpga_image):
-                print "Error: Invalid FPGA image file."
-                return 0
+                raise Exception("Error: Invalid FPGA image file.")
 
-            print "Begin FPGA write: this should take about 1 minute..."
+            print("Begin FPGA write: this should take about 1 minute...")
             start_time = time.time()
             self.erase_image(image_location, FPGA_IMAGE_SIZE_BYTES)
             self.write_image(fpga_image, image_location)
             self.verify_image(fpga_image, image_location)
-            print "Time elapsed: %f seconds"%(time.time() - start_time)
-            print "\n\n"
+            print("Time elapsed: %f seconds"%(time.time() - start_time))
+            print("\n\n")
 
         if fw:
             if safe: image_location = SAFE_FW_IMAGE_LOCATION_ADDR
@@ -193,25 +184,23 @@ class burner_socket(object):
             fw_image = fw_file.read()
 
             if len(fw_image) > FW_IMAGE_SIZE_BYTES:
-                print "Error: Firmware image file too large."
-                return 0
+                raise Exception("Error: Firmware image file too large.")
 
             if not is_valid_fw_image(fw_image):
-                print "Error: Invalid firmware image file."
-                return 0
+                raise Exception("Error: Invalid firmware image file.")
 
-            print "Begin firmware write: this should take about 1 second..."
+            print("Begin firmware write: this should take about 1 second...")
             start_time = time.time()
             self.erase_image(image_location, FW_IMAGE_SIZE_BYTES)
             self.write_image(fw_image, image_location)
             self.verify_image(fw_image, image_location)
-            print "Time elapsed: %f seconds"%(time.time() - start_time)
-            print "\n\n"
+            print("Time elapsed: %f seconds"%(time.time() - start_time))
+            print("\n\n")
 
         if reset: self.reset_usrp()
 
     def write_image(self, image, addr):
-        print "Writing image"
+        print("Writing image")
         self._status_cb("Writing")
         writedata = image
         #we split the image into smaller (256B) bits and send them down the wire
@@ -222,64 +211,64 @@ class burner_socket(object):
             (proto_ver, pktid, rxseq, flash_addr, rxlength, data) = unpack_flash_args_fmt(in_pkt)
 
             if pktid != update_id_t.USRP2_FW_UPDATE_ID_WROTE_TEH_FLASHES_OMG:
-              raise Exception, "Invalid reply %c from device." % (chr(pktid))
+              raise Exception("Invalid reply %c from device." % (chr(pktid)))
 
             writedata = writedata[FLASH_DATA_PACKET_SIZE:]
             addr += FLASH_DATA_PACKET_SIZE
             self._progress_cb(float(len(image)-len(writedata))/len(image))
 
     def verify_image(self, image, addr):
-        print "Verifying data"
+        print("Verifying data")
         self._status_cb("Verifying")
         readsize = len(image)
-        readdata = str()
+        readdata = bytes()
         while readsize > 0:
             if readsize < FLASH_DATA_PACKET_SIZE: thisreadsize = readsize
             else: thisreadsize = FLASH_DATA_PACKET_SIZE
-            out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_READ_TEH_FLASHES_LOL, seq(), addr, thisreadsize, "")
+            out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_READ_TEH_FLASHES_LOL, seq(), addr, thisreadsize)
             in_pkt = self.send_and_recv(out_pkt)
 
             (proto_ver, pktid, rxseq, flash_addr, rxlength, data) = unpack_flash_args_fmt(in_pkt)
 
             if pktid != update_id_t.USRP2_FW_UPDATE_ID_KK_READ_TEH_FLASHES_OMG:
-              raise Exception, "Invalid reply %c from device." % (chr(pktid))
+              raise Exception("Invalid reply %c from device." % (chr(pktid)))
 
             readdata += data[:thisreadsize]
             readsize -= FLASH_DATA_PACKET_SIZE
             addr += FLASH_DATA_PACKET_SIZE
             self._progress_cb(float(len(readdata))/len(image))
 
-        print "Read back %i bytes" % len(readdata)
+        print("Read back %i bytes" % len(readdata))
         #  print readdata
 
         #  for i in range(256, 512):
         #    print "out: %i in: %i" % (ord(image[i]), ord(readdata[i]))
 
         if readdata != image:
-            raise Exception, "Verify failed. Image did not write correctly."
+            raise Exception("Verify failed. Image did not write correctly.")
         else:
-            print "Success."
+            print("Success.")
 
     def read_image(self, image, size, addr):
-        print "Reading image"
+        print("Reading image")
         readsize = size
         readdata = str()
         while readsize > 0:
             if readsize < FLASH_DATA_PACKET_SIZE: thisreadsize = readsize
             else: thisreadsize = FLASH_DATA_PACKET_SIZE
-            out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_READ_TEH_FLASHES_LOL, seq(), addr, thisreadsize, "")
+            out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_READ_TEH_FLASHES_LOL, seq(), addr, thisreadsize)
             in_pkt = self.send_and_recv(out_pkt)
 
             (proto_ver, pktid, rxseq, flash_addr, rxlength, data) = unpack_flash_args_fmt(in_pkt)
 
             if pktid != update_id_t.USRP2_FW_UPDATE_ID_KK_READ_TEH_FLASHES_OMG:
-              raise Exception, "Invalid reply %c from device." % (chr(pktid))
+              raise Exception("Invalid reply %c from device." % (chr(pktid)))
 
             readdata += data[:thisreadsize]
             readsize -= FLASH_DATA_PACKET_SIZE
             addr += FLASH_DATA_PACKET_SIZE
 
-        print "Read back %i bytes" % len(readdata)
+        print("Read back %i bytes" % len(readdata))
 
         #write to disk
         f = open(image, 'w')
@@ -287,38 +276,38 @@ class burner_socket(object):
         f.close()
 
     def reset_usrp(self):
-        out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_RESET_MAH_COMPUTORZ_LOL, seq(), 0, 0, "")
+        out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_RESET_MAH_COMPUTORZ_LOL, seq(), 0, 0)
         try: in_pkt = self.send_and_recv(out_pkt)
         except socket.timeout: return
 
         (proto_ver, pktid, rxseq, flash_addr, rxlength, data) = unpack_flash_args_fmt(in_pkt)
         if pktid == update_id_t.USRP2_FW_UPDATE_ID_RESETTIN_TEH_COMPUTORZ_OMG:
-            raise Exception, "Device failed to reset."
+            raise Exception("Device failed to reset.")
 
     def erase_image(self, addr, length):
         self._status_cb("Erasing")
         #get flash info first
-        out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_ERASE_TEH_FLASHES_LOL, seq(), addr, length, "")
+        out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_ERASE_TEH_FLASHES_LOL, seq(), addr, length)
         in_pkt = self.send_and_recv(out_pkt)
 
         (proto_ver, pktid, rxseq, flash_addr, rxlength, data) = unpack_flash_args_fmt(in_pkt)
 
         if pktid != update_id_t.USRP2_FW_UPDATE_ID_ERASING_TEH_FLASHES_OMG:
-            raise Exception, "Invalid reply %c from device." % (chr(pktid))
+            raise Exception("Invalid reply %c from device." % (chr(pktid)))
 
-        print "Erasing %i bytes at %i" % (length, addr)
+        print("Erasing %i bytes at %i" % (length, addr))
         start_time = time.time()
 
         #now wait for it to finish
         while(True):
-            out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_R_U_DONE_ERASING_LOL, seq(), 0, 0, "")
+            out_pkt = pack_flash_args_fmt(USRP2_FW_PROTO_VERSION, update_id_t.USRP2_FW_UPDATE_ID_R_U_DONE_ERASING_LOL, seq(), 0, 0)
             in_pkt = self.send_and_recv(out_pkt)
 
             (proto_ver, pktid, rxseq, flash_addr, rxlength, data) = unpack_flash_args_fmt(in_pkt)
 
             if pktid == update_id_t.USRP2_FW_UPDATE_ID_IM_DONE_ERASING_OMG: break
             elif pktid != update_id_t.USRP2_FW_UPDATE_ID_NOPE_NOT_DONE_ERASING_OMG:
-                raise Exception, "Invalid reply %c from device." % (chr(pktid))
+                raise Exception("Invalid reply %c from device." % (chr(pktid)))
             time.sleep(0.01) #decrease network overhead by waiting a bit before polling
             self._progress_cb(min(1.0, (time.time() - start_time)/(length/80e3)))
 
@@ -343,14 +332,14 @@ def get_options():
 ########################################################################
 if __name__=='__main__':
     options = get_options()
-    if not options.addr: raise Exception, 'no address specified'
+    if not options.addr: raise Exception('no address specified')
 
-    if not options.fpga and not options.fw and not options.reset: raise Exception, 'Must specify either a firmware image or FPGA image, and/or reset.'
+    if not options.fpga and not options.fw and not options.reset: raise Exception('Must specify either a firmware image or FPGA image, and/or reset.')
 
     if options.overwrite_safe and not options.read:
         print("Are you REALLY, REALLY sure you want to overwrite the safe image? This is ALMOST ALWAYS a terrible idea.")
         print("If your image is faulty, your USRP2+ will become a brick until reprogrammed via JTAG.")
-        response = raw_input("""Type "yes" to continue, or anything else to quit: """)
+        response = input("""Type "yes" to continue, or anything else to quit: """)
         if response != "yes": sys.exit(0)
 
     burner = burner_socket(addr=options.addr)
@@ -359,7 +348,7 @@ if __name__=='__main__':
         if options.fw:
             file = options.fw
             if os.path.isfile(file):
-                response = raw_input("File already exists -- overwrite? (y/n) ")
+                response = input("File already exists -- overwrite? (y/n) ")
                 if response != "y": sys.exit(0)
             size = FW_IMAGE_SIZE_BYTES
             addr = SAFE_FW_IMAGE_LOCATION_ADDR if options.overwrite_safe else PROD_FW_IMAGE_LOCATION_ADDR
@@ -368,7 +357,7 @@ if __name__=='__main__':
         if options.fpga:
             file = options.fpga
             if os.path.isfile(file):
-                response = raw_input("File already exists -- overwrite? (y/n) ")
+                response = input("File already exists -- overwrite? (y/n) ")
                 if response != "y": sys.exit(0)
             size = FPGA_IMAGE_SIZE_BYTES
             addr = SAFE_FPGA_IMAGE_LOCATION_ADDR if options.overwrite_safe else PROD_FPGA_IMAGE_LOCATION_ADDR
diff --git a/host/utils/usrp_n2xx_net_burner_gui.py b/host/utils/usrp_n2xx_net_burner_gui.py
index 7fcb7d121..3b414a918 100755
--- a/host/utils/usrp_n2xx_net_burner_gui.py
+++ b/host/utils/usrp_n2xx_net_burner_gui.py
@@ -16,12 +16,18 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-import threading
 import usrp_n2xx_net_burner #import implementation
-import Tkinter, tkFileDialog, tkFont, tkMessageBox
+try:
+    import tkinter, tkinter.filedialog, tkinter.font, tkinter.messagebox
+except ImportError:
+    import tkFileDialog, tkFont, tkMessageBox
+    import Tkinter as tkinter
+    tkinter.filedialog = tkFileDialog
+    tkinter.font = tkFont
+    tkinter.messagebox = tkMessageBox
 import os
 
-class BinFileEntry(Tkinter.Frame):
+class BinFileEntry(tkinter.Frame):
     """
     Simple file entry widget for getting the file path of bin files.
     Combines a label, entry, and button with file dialog callback.
@@ -29,15 +35,15 @@ class BinFileEntry(Tkinter.Frame):
 
     def __init__(self, root, what, def_path=''):
         self._what = what
-        Tkinter.Frame.__init__(self, root)
-        Tkinter.Label(self, text=what+":").pack(side=Tkinter.LEFT)
-        self._entry = Tkinter.Entry(self, width=50)
-        self._entry.insert(Tkinter.END, def_path)
-        self._entry.pack(side=Tkinter.LEFT)
-        Tkinter.Button(self, text="...", command=self._button_cb).pack(side=Tkinter.LEFT)
+        tkinter.Frame.__init__(self, root)
+        tkinter.Label(self, text=what+":").pack(side=tkinter.LEFT)
+        self._entry = tkinter.Entry(self, width=50)
+        self._entry.insert(tkinter.END, def_path)
+        self._entry.pack(side=tkinter.LEFT)
+        tkinter.Button(self, text="...", command=self._button_cb).pack(side=tkinter.LEFT)
 
     def _button_cb(self):
-        filename = tkFileDialog.askopenfilename(
+        filename = tkinter.filedialog.askopenfilename(
             parent=self,
             filetypes=[('bin files', '*.bin'), ('all files', '*.*')],
             title="Select bin file for %s"%self._what,
@@ -46,13 +52,13 @@ class BinFileEntry(Tkinter.Frame):
 
         # open file on your own
         if filename:
-            self._entry.delete(0, Tkinter.END)
+            self._entry.delete(0, tkinter.END)
             self._entry.insert(0, filename)
 
     def get_filename(self):
         return self._entry.get()
 
-class ProgressBar(Tkinter.Canvas):
+class ProgressBar(tkinter.Canvas):
     """
     A simple implementation of a progress bar.
     Draws rectangle that fills from left to right.
@@ -61,7 +67,7 @@ class ProgressBar(Tkinter.Canvas):
     def __init__(self, root, width=500, height=20):
         self._width = width
         self._height = height
-        Tkinter.Canvas.__init__(self, root, relief="sunken", borderwidth=2, width=self._width-2, height=self._height-2)
+        tkinter.Canvas.__init__(self, root, relief="sunken", borderwidth=2, width=self._width-2, height=self._height-2)
         self._last_fill_pixels = None
         self.set(0.0)
 
@@ -78,20 +84,20 @@ class ProgressBar(Tkinter.Canvas):
         if frac: self.create_rectangle(0, 0, fill_pixels, self._height, fill="#357EC7")
         else:    self.create_rectangle(0, 0, self._width, self._height, fill="#E8E8E8")
 
-class SectionLabel(Tkinter.Label):
+class SectionLabel(tkinter.Label):
     """
     Make a text label with bold font.
     """
 
     def __init__(self, root, text):
-        Tkinter.Label.__init__(self, root, text=text)
+        tkinter.Label.__init__(self, root, text=text)
 
         #set the font bold
-        f = tkFont.Font(font=self['font'])
+        f = tkinter.font.Font(font=self['font'])
         f['weight'] = 'bold'
         self['font'] = f.name
 
-class USRPN2XXNetBurnerApp(Tkinter.Frame):
+class USRPN2XXNetBurnerApp(tkinter.Frame):
     """
     The top level gui application for the usrp-n2xx network burner.
     Creates entry widgets and button with callback to write images.
@@ -99,7 +105,7 @@ class USRPN2XXNetBurnerApp(Tkinter.Frame):
 
     def __init__(self, root, addr, fw, fpga):
 
-        Tkinter.Frame.__init__(self, root)
+        tkinter.Frame.__init__(self, root)
 
         #pack the file entry widgets
         SectionLabel(self, text="Select Images").pack(pady=5)
@@ -110,30 +116,28 @@ class USRPN2XXNetBurnerApp(Tkinter.Frame):
 
         #pack the destination entry widget
         SectionLabel(self, text="Select Address").pack(pady=5)
-        self._addr_entry = Tkinter.Entry(self, width=30)
-        self._addr_entry.insert(Tkinter.END, addr)
+        self._addr_entry = tkinter.Entry(self, width=30)
+        self._addr_entry.insert(tkinter.END, addr)
         self._addr_entry.pack()
 
         #the do it button
         SectionLabel(self, text="").pack(pady=5)
-        button = Tkinter.Button(self, text="Burn Images", command=self._burn)
-        self._enable_input = lambda: button.configure(state=Tkinter.NORMAL)
-        self._disable_input = lambda: button.configure(state=Tkinter.DISABLED)
+        button = tkinter.Button(self, text="Burn Images", command=self._burn)
+        self._enable_input = lambda: button.configure(state=tkinter.NORMAL)
+        self._disable_input = lambda: button.configure(state=tkinter.DISABLED)
         button.pack()
 
         #a progress bar to monitor the status
-        progress_frame = Tkinter.Frame(self)
+        progress_frame = tkinter.Frame(self)
         progress_frame.pack()
-        self._status = Tkinter.StringVar()
-        Tkinter.Label(progress_frame, textvariable=self._status).pack(side=Tkinter.LEFT)
+        self._status = tkinter.StringVar()
+        tkinter.Label(progress_frame, textvariable=self._status).pack(side=tkinter.LEFT)
         self._pbar = ProgressBar(progress_frame)
-        self._pbar.pack(side=Tkinter.RIGHT, expand=True)
+        self._pbar.pack(side=tkinter.RIGHT, expand=True)
 
     def _burn(self):
         self._disable_input()
-        threading.Thread(target=self._burn_bg).start()
 
-    def _burn_bg(self):
         #grab strings from the gui
         fw = self._fw_img_entry.get_filename()
         fpga = self._fpga_img_entry.get_filename()
@@ -141,16 +145,16 @@ class USRPN2XXNetBurnerApp(Tkinter.Frame):
 
         #check input
         if not addr:
-            tkMessageBox.showerror('Error:', 'No address specified!')
+            tkinter.messagebox.showerror('Error:', 'No address specified!')
             return
         if not fw and not fpga:
-            tkMessageBox.showerror('Error:', 'No images specified!')
+            tkinter.messagebox.showerror('Error:', 'No images specified!')
             return
         if fw and not os.path.exists(fw):
-            tkMessageBox.showerror('Error:', 'Firmware image not found!')
+            tkinter.messagebox.showerror('Error:', 'Firmware image not found!')
             return
         if fpga and not os.path.exists(fpga):
-            tkMessageBox.showerror('Error:', 'FPGA image not found!')
+            tkinter.messagebox.showerror('Error:', 'FPGA image not found!')
             return
 
         try:
@@ -162,14 +166,18 @@ class USRPN2XXNetBurnerApp(Tkinter.Frame):
                 def status_cb(status):
                     self._pbar.set(0.0) #status change, reset the progress
                     self._status.set("%s %s "%(status.title(), image_type))
-                burner.set_callbacks(progress_cb=self._pbar.set, status_cb=status_cb)
+                    self.update()
+                def progress_cb(progress):
+                    self._pbar.set(progress)
+                    self.update()
+                burner.set_callbacks(progress_cb=progress_cb, status_cb=status_cb)
                 burner.burn_fw(fw=fw_img, fpga=fpga_img, reset=False, safe=False)
 
-            if tkMessageBox.askyesno("Burn was successful!", "Reset the device?"):
+            if tkinter.messagebox.askyesno("Burn was successful!", "Reset the device?"):
                 burner.reset_usrp()
 
-        except Exception, e:
-            tkMessageBox.showerror('Verbose:', 'Error: %s'%str(e))
+        except Exception as e:
+            tkinter.messagebox.showerror('Verbose:', 'Error: %s'%str(e))
 
         #reset the progress bar
         self._pbar.set(0.0)
@@ -181,7 +189,7 @@ class USRPN2XXNetBurnerApp(Tkinter.Frame):
 ########################################################################
 if __name__=='__main__':
     options = usrp_n2xx_net_burner.get_options()
-    root = Tkinter.Tk()
+    root = tkinter.Tk()
     root.title('USRP-N2XX Net Burner')
     USRPN2XXNetBurnerApp(root, addr=options.addr, fw=options.fw, fpga=options.fpga).pack()
     root.mainloop()