Texas Instruments MSP430 Student Guide

Appendix – Looking ‘Under the Hood’
8 - 34 Gettings Started with the MSP430 - Using Energia (Arduino)
Two ways to change the MSP430 clock source
There are two ways you can change your MSP430 clock source:
 Modify the initClocks() function defined in wiring.c
 Add the necessary code to your Setup() function to modify the clock sources
Advantages
 Do not need to re-modify wiring.c after updating to new revision of Energia
 Changes are explicitly shown in your own sketch
 Each sketch sets its own clocking, if it needs to be changed
 In our lab, it allows us to demonstrate that you can modify hardware registers – i.e.
processor specific hardware – from within your sketch
Disdvantages
 Code portability – any time you add processor specific code, this is something that will
need to be modified whenever you want to port your Arduino/Energia code to another
target platform
 A little less efficient in that clocking gets set twice
 You have to change each sketch (if you always want a different clock source/rate)

Texas Instruments MSP430 Specifications

General

Brand	Texas Instruments
Model	MSP430
Category	Microcontrollers
Language	English