Lab 8
Gettings Started with the MSP430 - Using Energia (Arduino) 8 - 25
5. A couple more items to notice…
Just like standard C code, we can create variables. What is the global variable used for in this
example?
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Finally, this is a very simple way to read and respond to a button. What would be a more
efficient way to handle responding to a pushbutton? (And why would this be important to
many of us MSP430 users?)
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(Note, we will look at this ‘more efficient’ method in a later part of the lab.)
Reverse button/LED action
Do you find this example to be the reverse of what you expected? Would you prefer the LED to
go ON when the button is pushed, rather than the reverse. Let’s give that a try.
6. Save the example to sketch new file before modification.
Once again, we recommend saving the original sketch before modification. Save it to:
C:\msp430_workshop\<target>\energia\Button_reversed
7. Make the LED light only when the button is pressed.
Change the code as needed.
Hint: The changes required are similar to what you would do in C, they are not unique to
Energia/Arduino.
8. When your changes are finished, upload it to your Launchpad.
Did it work? _______________________________________________________________
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