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  1. My question is this: can I use a while loop to suspend a program until a value in a global variable is >= a constant. I'm using timer0 to interrupt every one second. I update a global integer value by one every time the interrupt method executes. However, when my program reaches the while loop, it locks up my program. Does the while loop prevent the interrupt from firing, or is the while loop putting a lock on the variable and not allowing the interrupt statement to update. The code I have is as follows and I am new to hardware programming. // initialize timer TA0CCR0 = 12
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