From 2ccd88f9195876d832a6b85ca5a9492ce305cdaf Mon Sep 17 00:00:00 2001
From: Jim Ewald <jewald@parallax.com>
Date: Wed, 15 Feb 2017 11:23:28 -0800
Subject: [PATCH] Add code to detect FTDI driver state for Windows.

---
 BlocklyHardware.py | 56 ++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 47 insertions(+), 9 deletions(-)

diff --git a/BlocklyHardware.py b/BlocklyHardware.py
index 26be7e0..f1ce93e 100644
--- a/BlocklyHardware.py
+++ b/BlocklyHardware.py
@@ -3,15 +3,17 @@
 from sys import platform
 from subprocess import Popen, PIPE, check_output, CalledProcessError
 
-# Define platform constants
+# Platform constants
+PLATFORM_LINUX = 'linux2'
 PLATFORM_MACOS = 'darwin'
-PLATFORM_UBUNTU = 'linux2'
+PLATFORM_WINDOWS = 'win32'
 
 # Define error constants
 FTDI_DRIVER_NOT_INSTALLED = 201
 FTDI_DRIVER_NOT_LOADED = 202
 PLATFORM_UNKNOWN = 2
 
+
 # Enable logging
 __module_logger = logging.getLogger('blockly')
 
@@ -29,8 +31,10 @@ def init():
 def is_module_installed():
     if platform == PLATFORM_MACOS:
         return __is_module_installed_macos()
-    elif platform == PLATFORM_UBUNTU:
-        return __is_module_installed_ubuntu()
+    elif platform == PLATFORM_LINUX:
+        return __is_module_installed_linux()
+    elif platform == PLATFORM_WINDOWS:
+        return __is_module_installed_windows()
     else:
         return PLATFORM_UNKNOWN
 
@@ -38,14 +42,14 @@ def is_module_installed():
 def is_module_loaded():
     if platform == PLATFORM_MACOS:
         return __is_module_loaded_macos()
-    elif platform == PLATFORM_UBUNTU:
-        return __is_module_loaded_ubuntu()
+    elif platform == PLATFORM_LINUX:
+        return __is_module_loaded_linux()
     else:
         return PLATFORM_UNKNOWN
 
 
 # Ubuntu implementation
-def __is_module_installed_ubuntu():
+def __is_module_installed_linux():
     try:
         process = Popen(['cat', '/proc/modules'], stdout=PIPE, stderr=PIPE)
         output = check_output(('grep', 'ftdi'), stdin=process.stdout)
@@ -57,7 +61,7 @@ def __is_module_installed_ubuntu():
         return FTDI_DRIVER_NOT_INSTALLED
 
 
-def __is_module_loaded_ubuntu():
+def __is_module_loaded_linux():
     try:
         process = Popen(['dmesg', '-H', '-x'], stdout=PIPE, stderr=PIPE)
         output = check_output(('grep', 'ftdi'), stdin=process.stdout)
@@ -91,4 +95,38 @@ def __is_module_loaded_macos():
         return 0
     except CalledProcessError:
         __module_logger.warning('No FTDI modules detected.')
-        return 1
\ No newline at end of file
+        return 1
+
+
+# Windows implementation
+def __is_module_installed_windows():
+    try:
+        out, err = Popen('driverquery.exe -v', stdout=PIPE).communicate()
+        position = out.find('FT')
+        if position > 0:
+            __module_logger.debug('FTDI module load state')
+            __module_logger.debug(out[position:position+91])
+            return 0
+        else:
+            __module_logger.warning('No FTDI modules installed.')
+            return FTDI_DRIVER_NOT_INSTALLED
+    except CalledProcessError:
+        __module_logger.warning('No FTDI modules detected.')
+        return FTDI_DRIVER_NOT_INSTALLED
+
+
+def __is_module_loaded_windows():
+    try:
+        out, err = Popen('driverquery.exe -v', stdout=PIPE).communicate()
+        position = out.find('FT')
+        if position > 0:
+            __module_logger.debug('FTDI module load state')
+            __module_logger.debug(out[position+84:position+91])
+            return 0
+        else:
+            __module_logger.warning('No FTDI modules loaded.')
+            return FTDI_DRIVER_NOT_INSTALLED
+    except CalledProcessError:
+        __module_logger.warning('No FTDI modules detected.')
+        return FTDI_DRIVER_NOT_INSTALLED
+