Added readme

README

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+# TRON.asm
+
+## Description
+
+TRON.asm is a tron clone written for the bfh carme kit, which is based on a stm32 controller.
+It is a project for the firmware development class. All I/O parts were developped in assembly language using the thumb instruction set.
+The rest of it is written in the programming language c.
+
+Project Structure: 
+
+img/*               - GIMP Project for the welcome screen
+libs/*              - STM32f4xx libraries
+utils/*             - Useful scripts 
+
+src/bitmap.h        - Contains a welcome screen
+src/draw.{c.h}      - Draw a bitmap
+src/game.{c,h}      - Main game logic
+src/main.c          - Systick handler and programm start
+src/io.{s,h}        - IO functions implemented in assembly language
+src/player.{c,h}    - Implementation of the player object
+src/startup.s       - Startup code
+src/syscalls.c      - Syscall lowlevel functions (Atollic true studio)
+src/io.c.unused     - Old io-fuctions implemented in c programming language.
+
+## How to Build and flash
+
+- Clone the repository
+- Build the software by using our Makefile
+- Type "make all flash" to build the software and flash it to the board. Be aware that we are using a rather large bitmap, so flashing will take some time.
+- Type "make all debug" to build the software and start the gdb debugger.