Communication between MSP430 and ACC, C-Code

Hi!

I want to build a communication based on 4 wire spi between my MSP430F5438A and accelerator ADXL345.

I want to get the informations of the axes.
For this purposes I wrote a code based in some parts on the Arduino example Code of Sparkfun, but I am not exactly sure in some parts of it.

May somebody take a look on the code and give me some advices.
I plna one change:The varible settings should be putted as preprocessor definitions, but I hink it should for the start be also ok like this.

My concerns are the structure of the interupt routine and the structure of the main.

Thanks and Greetings