Added documentation for the OrangeCrab r0.2.1 fpga board

README.md

@@ -33,7 +33,7 @@ You need to set FPGA\_BOARD in [./common.mk](./common.mk) to the name of a direc
 
 These are the currently supported FPGA boards:
 
-* OrangeCrab r0.2.1 ( last tested with commit fde181aa66 )
+* [OrangeCrab r0.2.1](system/fpga_config/OrangeCrab_r0.2.1/README.md) ( last tested with commit fde181aa66 )
 
 This list shows the software needed and the versions used during development :
 

system/fpga_config/OrangeCrab_r0.2.1/README.md

@@ -0,0 +1,15 @@
+The OrangeCrab r0.2.1 has been configured with an I2C bus controller and LiteDRAM for the DDR3 memory that is on-board.
+
+This is a block diagram of the system:
+
+<img width="700" style=" margin: 10px 0px 10px 10px;" alt="9086 logo" src="readme_files/readme_files/overview_diagram.svg">
+
+and inside the FPGA:
+
+<img width="700" style=" margin: 10px 0px 10px 10px;" alt="9086 logo" src="readme_files/system_diagram.svg">
+
+and this is the hardware setup during development:
+
+<img width="700" style=" margin: 10px 0px 10px 10px;" alt="9086 logo" src="readme_files/readme_files/readme_files/picture.png">
+
+You can find some configuration options in the [./config.mk](./config.mk)