flex_set_port_direction

Device Compatibility Device Compatibility 7330 Y 7340 Y 7344 Y 7350 Y 7390 N NI SoftMotion Controller for CANopen—Xenus N NI SoftMotion Controller for CANopen—Accelnet N

Set I/O Port Direction

Usage

status = flex_set_port_direction(u8 boardID, u8 port, u16 directionMap);

Purpose

Sets the direction of a general-purpose I/O port as input or output.

Parameters

Name	Type	Description
boardID	u8	assigned by Measurement & Automation Explorer (MAX)
port	u8	general-purpose I/O port to control
directionMap	u16	port direction control

Parameter Discussion

port is the general-purpose I/O port (NIMC_IO_PORT1 through NIMC_IO_PORT8) to control. Refer to 73xx Controller General-Purpose I/O Port IDs for general-purpose I/O port resource IDs.

directionMap is the bitmap of directions for the bits in the I/O port:

D15	...	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
XXX	...	XXX	XXX	Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0

For D0 through D7:
   1 = Input (default)
   0 = Output

Using This Function

This function configures the bits in a general-purpose I/O port as input or output. After setting the direction, use the Read I/O Port function to read the port, the Set I/O Port MOMO function to write to the port, and the Set I/O Port Polarity function to set the polarity of each bit in the port to active high or active low.

Note  The direction of bits in the RTSI software port (NIMC_RTSI_PORT) is controlled with the Select Signal function.