typedef struct MPICompareConfig {
    MPIIoTrigger    trigger;    /* which output to use... */
} MPICompareConfig;

typedef struct MEICompareConfig {
    long                    continuous;
    MEICompareDivByNConfig  divByN;
} MEICompareConfig;

Event compare mode (default) uses a handshake to ensure hardware/software synchronization. A single rising edge and single falling edge on the compare output is guaranteed. This mode is useful when re-arming compare objects is required for multiple compare position. There is system overhead to re-arm compare events.

Continuous compare mode constantly compares the compare position register to the position counter. The compare output is toggled based on compare logic, without software system notification and without the need to re-arm. This mode is useful when a single compare position is required for a valid compare output whenever the position is past some limit. If the position feedback during a move is not monotonic at the compare value (jitters back and forth), the compare output will change state each time the position crosses the compare value.