Merge pull request #1541 from sg-/venv

Venv

.gitignore

@@ -11,6 +11,7 @@ private_settings.py
 
 # Default Build Directory
 build/
+venv/
 
 # Eclipse Project Files
 .cproject

README.md

@@ -98,7 +98,7 @@ Silicon Labs:
 
 Atmel:
 * [SAM R21 XPRO](https://developer.mbed.org/platforms/SAMR21-XPRO/) (Cortex-M0+)
-* [SAM L21 XPRO B] (https://developer.mbed.org/platforms/SAML21-XPRO/) (Cortex-M0+)
+* [SAM L21 XPRO](https://developer.mbed.org/platforms/SAML21-XPRO/) (Cortex-M0+)
 * [SAM D21 XPRO](https://developer.mbed.org/platforms/SAMD21-XPRO/) (Cortex-M0+)
 * [SAM W25 XPRO](https://developer.mbed.org/platforms/SAMW25-XPRO/) (Cortex-M0+)
 
@@ -134,3 +134,30 @@ For discussing the development of the mbed SDK itself (Addition/support of micro
 For every topic regarding the use of the mbed SDK, rather than its development, please post on the [mbed.org forum](http://mbed.org/forum/), or the [mbed.org Q&A](http://mbed.org/questions/).
 
 For reporting issues in the mbed libraries please open a ticket on the issue tracker of the relevant [mbed official library](http://mbed.org/users/mbed_official/code/).
+
+Setup
+-----
+Skip any step where a compatible tool already exists
+
+1. Install [Python 2.7.9 or above](https://www.python.org/downloads/) and make sure it's added to path
+2. Install [Git](https://git-scm.com/downloads) and make sure it's added to path
+3. Install virtualenv in python
+
+```
+> git clone https://github.com/mbedmicro/mbed
+> pip install virtualenv
+> virtualenv venv
+> 
+```
+
+Develop
+-------
+1. Update dependencies and start virtual environment. This should be done everytime you pull new changes
+
+```
+> "venv/Scripts/activate"
+> pip install -r requirements.txt
+> cd workspace_tools
+> ... do things ...
+> "venv/Scripts/deactivate"
+```