• Modify a millisecond timer function, fromUpdating PWM duty cycle using a millisecond timer, we create a 10 mS timer.
• Test the frequency, using the Data Visualizer, by toggling a pin in the timer IRQ.
• Change ADC auto trigger source to Timer Counter 0 Compare Match A.
• Create volatile global variables 'accumulator', 'average' and 'samples', using these to calculate an average in the ADC IRQ.
• Verify that we are now averaging ADC light sensor readings every second.

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