PulseInInv

Syntax:

    PulseInInv pin, user_variable, time units

Command Availability:

Available on all microcontrollers.

Explanation:

The PulseIn command will monitor the specified pin when the pin is low, and then measure the low time. It will store the time in the user variable. The user variable must be a WORD if returned units are expected to be > 255 (Example: Pulse is 500 ms)

PulseInInv is not recommended for accurate measurement of microsecond pulses.

Example:

    #chip 12F629, 4

    Dir GPIO.0 In
    Dim TimeResult as WORD

    Do while GPIO.0 = On        'Wait for next negative edge to start measuring
    Loop

    PulseinInv GPIO.0, TimeResult, ms          ' <<< the PulseInInv instruction

Key line: PulseinInv GPIO.0, TimeResult, ms — waits for GPIO.0 to go high again, then stores how long it was low, in milliseconds, into TimeResult.

See Also:

  • PulseIn — related command in the same category
  • PulseOut — related command in the same category
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