New Reference For Msp430 Polling Technique

Since we are unable to use interrupt enabled Port 1, we had to substitute the use of interrupts with a technique known as polling. Polling is a process of manually checking values for changes on a repetitive basis, as a part of the main program loop [XX]. There are pros and cons with using either interreupts or polling for triggering. Also, the timing of our system allows us to use polling without having any negative side effects, such as creating unacceptable system latencies.

Nagy, Chris. Embedded Systems Design using the TI MSP430 Series. Elsevier, Burlington, Massachusetts. 2003. pgs. 37-38,