NIHSDIO_ATTR_DATA_POSITION

Specific Attribute

Data type	Access	Applies to	Coercion	High-Level Functions
ViInt32	R/W	Channel	None	niHSDIO_ConfigureDataPosition

Description

Specifies the data position for the operation, which specifies which edge of the Sample clock is used to time the generation or acquisition. You can also configure the device to generate or acquire data at a configurable delay past each rising edge of the Sample clock. When this attribute is set to NIHSDIO_VAL_DELAY_FROM_SAMPLE_CLOCK_RISING_EDGE, use NIHSDIO_ATTR_DATA_POSITION_DELAY to specify the delay value.

Note  To configure a delay on NI 656x devices, you must delay all channels on the device. NI-HSDIO returns an error if you apply a delay to only a partial channel list.

Defined Values:

NIHSDIO_VAL_SAMPLE_CLOCK_RISING_EDGE (18)	The device samples or generates data on the Sample clock rising edge.
NIHSDIO_VAL_SAMPLE_CLOCK_FALLING_EDGE (19)	The device samples or generates data on the Sample clock falling edge.
NIHSDIO_VAL_DELAY_FROM_SAMPLE_CLOCK_RISING_EDGE (20)	The device samples or generates data with a delay from the Sample clock rising edge. Specify the delay using NIHSDIO_ATTR_DATA_POSITION_DELAY. This choice has more jitter than the rising or falling edge values. Certain devices have Sample clock frequency limitations on when a custom delay can be used. Refer to the device sections for details.