IOLineChangedEventHandler Delegate

When the status of an IO line changes, this can happen in 1 of 6 ways: ALL TYPES OF LINE: (1) the previous sampled value was 0 and the current sampled value is 1, RISING EDGE (2) the previous sampled value was 1 and the current sampled value is 0, FALLING EDGE ONLY INPUT LINES: (3) the previous sampled value was 1 and the current sampled value is 1, but between the 2 samplings the low latch has triggered which means the line has gone from 1 to 0 and back to 1 again, LATCHED (includes falling and rising edge) (4) the previous sampled value was 0 and the current sampled value is 0, but between the 2 samplings the high latch has triggered which means the line has gone from 0 to 1 and back to 0 again, LATCHED (includes rising and falling edge) ONLY OUTPUT LINES: (5) When the line is set changing it from a 0 to a 1, RISING EDGE (6) When the line is set changing it from a 1 to a 0, FALLING EDGE

public delegate void IOLineChangedEventHandler(
	IOLine line,
	EDDevice device,
	IOChangeTypes changeType
)

Public Delegate Sub IOLineChangedEventHandler ( 
	line As IOLine,
	device As EDDevice,
	changeType As IOChangeTypes
)

type IOLineChangedEventHandler = 
    delegate of 
        line : IOLine * 
        device : EDDevice * 
        changeType : IOChangeTypes -> unit