[Overview][Resource strings][Constants][Types][Classes][Procedures and functions][Index]

Reference for unit 'fpgpio' (#pascalio)

TGpioPin.PollChange

Polls GPIO pin for change

Declaration

Source position: fpgpio.pas.bak line 103

public function TGpioPin.PollChange(

delay: LongInt;

timeout: LongInt;

out value: Boolean

):Boolean; virtual; function TGpioPin.PollChange(

delay: LongInt;

timeout: LongInt;

out value: Boolean;

OnIdle: TGpioPollIdle

):TGpioPollResult;

Arguments

`delay`		Delay between polls in milliseconds
`timeout`		Maximum time for polling in milliseconds
`value`		New Value

Function result

True indicates a change in TGpioPin.Value; the value is stored in value. False indicates a timeout or cancel. In the other overloaded version, see TGpioPollResult for documentation.

Arguments

`delay`		Delay between polls in milliseconds
`timeout`		Maximum time for polling in milliseconds
`value`		New Value
`OnIdle`		Callback after each poll