I2CAckPollState

Syntax:

	<test condition> I2CAckPollState

Command Availability:

Available on all microcontrollers except 12 bit instruction Microchip PIC microcontrollers (10F, 12F5xx, 16F5xx chips)

Explanation:

Should only be used when I2C routines are operating in Master mode, this command will return the last state of the acknowledge response from a specific I2C device on the I2C bus.

I2CACKPOLL sets the state of variable I2CAckPollState. I2CAckPollState can only read - it cannot be set.

Example:

	 ...
	' ACK polling removes the need to for the 24xxxxx device to have a 5ms
	write time
	I2CACKPOLL( eeprom_device )
	' You check the exit state,
	' Use I2CAckPollState to check the state of a target device
	if I2CAckPollState = false then          ' <<< the I2CAckPollState check this page documents
		' the device acknowledged -- it is present and ready
	end if
	 ...

Key line: if I2CAckPollState = false then — after I2CACKPOLL addresses a device, I2CAckPollState is false if that device acknowledged the address, meaning it is present on the bus and ready.

Supported in <I2C.H>

See Also:

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