Dennis Chao
Calibrate test cases

Case 1

INPUT
push the cal button down and make a small clockwise circle (INPUT = 1) 

OUTPUT
the extremes should rewrite the current values

Case 2

INPUT
push the cal button down and make a full clockwise circle (INPUT = 1)

OUTPUT
the extremes should should rewrite the small circle

Case 3

INPUT
don't push the cal button and rotate the joy clockwise stick. (INPUT = 0) 

OUTPUT
nothing should happen.

Case 4

INPUT
press the cal button and don't use the joy stick (INPUT = 1)

OUTPUT
all the extreme values should be erased and set to 127 (OUTPUT = 127)

Case 5

INPUT
push the cal button down and make a small counter-clockwise circle (INPUT = 1) 

OUTPUT
the extremes should rewrite the current values

Case 6

INPUT
push the cal button down and make a full counter-clockwise circle (INPUT = 1)

OUTPUT
the extremes should should rewrite the small circle

Case 7

INPUT
don't push the cal button and rotate the joy stick counter-clockwise. (INPUT = 0) 

OUTPUT
nothing should happen.