Add Windows support to DFU installation tools.

Tweak Makefile further for cs-make on Windows.  Add Windows support
to support/scripts/reset.py

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>

1 files changed, 84 insertions, 53 deletions

diff --git a/support/scripts/reset.py b/support/scripts/reset.py
index ad26d10..2122d36 100755
--- a/support/scripts/reset.py
+++ b/support/scripts/reset.py
@@ -1,54 +1,81 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 import serial
 import os
+import platform
 import sys
 import time
 from struct import pack
 
-def get_maple_device_path(file_prefix):
-    """Try to find the device file for the Maple on OS X; assuming
+def unix_get_maple_path(file_prefix):
+    """Try to find the device file for the Maple on *nix; assuming
     that it looks like /dev/<file_prefix>*.  If there are multiple
     possibilities, ask the user what to do.  If the user chooses not
     to say, returns None."""
     possible_paths = [os.path.join('/dev', x) for x in os.listdir('/dev') \
                           if x.startswith(file_prefix)]
+    return choose_path(possible_paths)
+
+def windows_get_maple_path():
+    """Similar to unix_get_maple_path(), but on Windows."""
+    import _winreg as reg
+    p = 'HARDWARE\\DEVICEMAP\\SERIALCOMM'
+    k = reg.OpenKey(reg.HKEY_LOCAL_MACHINE, p)
+    possible_paths = []
+    i = 0
+    while True:
+        try:
+            possible_paths.append(reg.EnumValue(k, i)[1])
+            i += 1
+        except WindowsError:
+            break
+    return choose_path(possible_paths)
+
+def choose_path(possible_paths):
     if len(possible_paths) == 0:
         return None
     elif len(possible_paths) == 1:
         return possible_paths[0]
     else:
         print 'Found multiple candidates for the Maple device:'
-        for (i,p) in enumerate(possible_paths):
-            print '\t%d. %s' % (i+1, p)
-
-        prompt = 'Enter a number to select one, or q to quit: '
-        while True:
-            resp = raw_input(prompt).strip().lower()
-            if resp == 'q': return None
-
-            try:
-                i = int(resp, 10)
-            except ValueError:
-                pass
-            else:
-                if 0 <= i-1 < len(possible_paths):
-                    return possible_paths[i-1]
-
-            prompt = 'Please enter a number from the list, or q to quit: '
-
-os_sysname = os.uname()[0]
-if os_sysname == 'Linux':
-    maple_path = get_maple_device_path('ttyACM')
+        return choose_among_options(possible_paths)
+
+def choose_among_options(options):
+    for (i,p) in enumerate(options):
+        print '\t%d. %s' % (i+1, p)
+
+    prompt = 'Enter a number to select one, or q to quit: '
+    while True:
+        resp = raw_input(prompt).strip().lower()
+        if resp == 'q': sys.exit()
+
+        try:
+            i = int(resp, 10)
+        except ValueError:
+            pass
+        else:
+            if 0 <= i-1 < len(options):
+                return options[i-1]
+
+        prompt = 'Please enter a number from the list, or q to quit: '
+
+plat_sys = platform.system()
+plat_bits = platform.architecture()[0]
+if plat_sys == 'Linux':
+    if plat_bits == '64bit':
+        print 'You appear to be using 64-bit Linux. Let us know if this works.'
+    maple_path = unix_get_maple_path('ttyACM')
     # fall back on /dev/maple if that doesn't work
     if maple_path is None:
         maple_path = '/dev/maple'
         print 'Could not find Maple serial port; defaulting to /dev/maple.'
-elif os_sysname == 'Darwin':
-    maple_path = get_maple_device_path('tty.usbmodem')
+elif plat_sys == 'Darwin':
+    maple_path = unix_get_maple_path('tty.usbmodem')
+elif plat_sys == 'Windows':
+    maple_path = windows_get_maple_path()
 else:
-    # TODO [mbolivar] what to do for windows, BSD, whatever?
-    maple_path = '/dev/maple'
+    maple_path = raw_input('Unrecognized platform.  Please enter '
+                           "the path to the Maple's serial port device file:")
 
 if maple_path is None:
     print 'Could not find the Maple serial port for reset.', \
@@ -65,30 +92,34 @@ print 'Using %s as Maple serial port' % maple_path
 
 try:
     ser = serial.Serial(maple_path, baudrate=115200, xonxoff=1)
-    ser.open()
-
-    # try to toggle DTR/RTS (old scheme)
-    ser.setRTS(0)
-    time.sleep(0.01)
-    ser.setDTR(0)
-    time.sleep(0.01)
-    ser.setDTR(1)
-    time.sleep(0.01)
-    ser.setDTR(0)
-
-    # try magic number
-    ser.setRTS(1)
-    time.sleep(0.01)
-    ser.setDTR(1)
-    time.sleep(0.01)
-    ser.setDTR(0)
-    time.sleep(0.01)
-    ser.write("1EAF")
-
-    # ok we're done here
-    ser.close()
-
-except:
-    print 'Failed to open serial port %s for reset.' % maple_path
+
+    try:
+        # try to toggle DTR/RTS (old scheme)
+        ser.setRTS(0)
+        time.sleep(0.01)
+        ser.setDTR(0)
+        time.sleep(0.01)
+        ser.setDTR(1)
+        time.sleep(0.01)
+        ser.setDTR(0)
+
+        # try magic number
+        ser.setRTS(1)
+        time.sleep(0.01)
+        ser.setDTR(1)
+        time.sleep(0.01)
+        ser.setDTR(0)
+        time.sleep(0.01)
+        ser.write("1EAF")
+
+        # Windows quirk: delay a bit before proceeding
+        if plat_sys == 'Windows': time.sleep(0.5)
+    finally:
+        # ok we're done here
+        ser.close()
+
+except Exception as e:
+    print 'Failed to open serial port %s for reset: %s' % (maple_path,
+                                                           e.message)
     sys.exit()