added a small guide.

platform/msb430/doc/msb430.txt

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+/** \addtogroup platform
+ * @{
+ **/
+
+/**
+\defgroup msb430 The Modular Sensor Board
+
+The Modular Sensor Board (MSB430) was developed by FU-Berlin and was 
+added as a platform in Contiki in the spring of 2007. In its basic form, 
+this board features a Texas Instruments MSP430f1612 processor, a 
+Chipcon CC1020 radio chip, an MMA7260Q accelerometer, and a Sensirion 
+SHT11 temperature and humidity sensor. The MSB also features an SD card 
+reader, which makes it suitable for storage-centric sensor networks. 
+There are also extended versions of the board that are equipped with a 
+GPRS-modem and a GPS-receiver.
+
+\section msb430-programming Programming the MSB430
+
+The msb430 port requires an installation of mspgcc 
+(http://mspgcc.sourceforge.net) to compile. Once the compilation tools 
+have been installed, you can compile your software and Contiki with 
+three main target types:
+
+<file>.firmware - A system image in ELF format.
+<file>.ihex     - A firmware file converted to the Intel Hex format.
+<file>.u        - Direct upload to a node.
+
+The node is typically programmed by typing
+
+	make TARGET=msb430 <program name>.u
+
+Alternatively, a ready .ihex file can be uploaded to the node by running
+
+	msp430-jtag -l <parallell port identifier> -e -I <ihex file>
+
+More information about the MSB430 platform can be found at
+Scatterweb: http://www.scatterweb.com/content/products/MSB_en.html
+
+@{
+
+*/
+
+/** @} */
+/** @} */