work on README.md

README.md

@@ -17,6 +17,38 @@ KED is intendet to be used as a git submodule. Allowing the mainternars of KED t
 ### Before you ask, Of Course, Yes, you would be one of our heroes if you decide to be a contributor ! 
 
 
+# What is KED?
+KED is a framework created by Kerem Yollu and Edwin Koch. KED stands for
+"Kerem and EdwinDevelopement". The idea was initially started by the desire to create a hardware
+abstraction Layer (HAL)...
+
+# KED structure
+This section will explain how KED is structured and how you can implement drivers, peripherals,
+etc.
+
+# Chip Support Layer (CSL)
+The CSL folder holds all the target device specific resources and implementations. For example if
+you want to use the NUCLEO 042k6 you have to choose the target device "stm32f042k6t6" as this is
+the phisical IC used by the NUCLEO board. This target device is represented inside CSL folder as a
+folder with the target device name. This is crucial as there can be differeces between different
+packages with the same IC core e.g "stm32f042k6t6" vs "stm32f042f6p6". Both of them are the "same"
+but have different pin mappings and even differing peripheral structures.
+
+## Implementing new target device
+To implement a new target device to KED please follow the following steps in this section. Each
+subsection will explaine how the structure is defined and what has to be implemented sothat at the
+end there is a fully implemented 
+
+## Main structure of target device resources
+Each target device has its own folder in which all the resorces and device specific implementations
+ are located. This folder is located to 
+in the csl folder of KED
+
+## Implementing Peripherals
+First create a folder with the spesific IC name. E.g. stm32f042k6t6 (used on the NUCLEO F042K6).
+In this folder
+TODO -> explain how to implement periperals and include 
+
 INTERFACES 
 
 	- pin