Beginning Microcontrollers with the MSP430 - Tutorial
From the Preface: I decided to write this tutorial after seeing many students struggling with the concepts of programming the MSP430 and being unable to realize their applications and projects. This was not because the MSP430 is hard to program. On the contrary, it adopts many advances in computing that has allowed us to get our application running quicker than ever. However, it is sometimes difficult for students to translate the knowledge they acquired when studying programming for more traditional platforms to embedded systems.