Tweak AVRdude conf file detection in windows

On windows the AVRdude configuration file is now detected properly. The
comments and `README` are updated as well.

Fix #187

1 files changed, 23 insertions, 1 deletions

diff --git a/README.md b/README.md
index 5441f66..5898daa 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,8 @@ On Mac using MacPorts:
 
 On Windows:
 
+You need to install Cygwin and its packages for Make, Perl and the next Serial library.
+
        pySerial can be downloaded from PyPi
 
 On other systems:
@@ -93,12 +95,32 @@ On Windows (using cygwin), you might want to set:
     MONITOR_PORT  = com3
     BOARD_TAG     = mega2560
 
+It is recommended in Windows that you create a symbolic link directory for avoiding problem with folder naming conventions on Windows. Specially if your your Arduino folder is in:
+
+c:\Program Files (x86)\Arduino
+
+You will get problem for the special characters on the folder name. More details about this can be found on https://github.com/sudar/Arduino-Makefile/issues/94
+
+For creating a symbolic link you have to use the command “mklink” on Windows, e.g.
+
+mklink /d c:\Arduino c:\Program Files (x86)\Arduino
+
+At the end the variables end up being.
+
+ARDUINO_DIR=../../../../../Arduino
+
+Instead of
+
+ARDUINO_DIR=../../../../../Program\ Files\ \(x86\)/Arduino
+
+
+
 - `BOARD_TAG` - Type of board, for a list see boards.txt or `make show_boards`
 - `MONITOR_PORT` - The port where your Arduino is plugged in, usually `/dev/ttyACM0` or `/dev/ttyUSB0` in Linux or Mac OS X and `com3`, `com4`, etc. in Windows.
 - `ARDUINO_DIR` - Path to Arduino installation. In Cygwin in Windows this path must be
   relative, not absolute (e.g. "../../arduino" and not "/c/cygwin/Arduino").
 - `ARDMK_DIR`   - Path where the `*.mk` are present. If you installed the package, then it is usually `/usr/share/arduino`
-- `AVR_TOOLS_DIR` - Path where the avr tools chain binaries are present. If you are going to use the binaries that came with Arduino installation, then you don't have to set it.
+- `AVR_TOOLS_DIR` - Path where the avr tools chain binaries are present. If you are going to use the binaries that came with Arduino installation, then you don't have to set it. Otherwise set it realtive and not absolute.
 
 The list of all variables that can be overridden is available at [arduino-mk-vars.md](arduino-mk-vars.md) file.