imaqIOGetShutdownState
Format
rval = imaqIOGetShutdownState(IMAQIO_SESSION id, IMAQIOSignalType signalType, unsigned long signalNumber, IMAQIOSignalState* value);
Purpose
Gets the shutdown state of one of the output signals on the NI-IMAQ I/O device.
Parameters
| Name | Type | Direction |
| id | IMAQIO_SESSION | input |
| signalType | IMAQIOSignalType | input |
| signalNumber | unsigned long | input |
| value | IMAQIOSignalState* | output |
Parameter Discussion
id is the ID of the session to get the shutdown state for.
signalType is the type of signal to associated with the NI-IMAQ I/O device. The following values are valid for this parameter:
| Name | Constant | Description |
| IMAQIO_SIGNAL_ISO_OUT | 3 | ISO output signals are general-purpose outputs. |
| IMAQIO_SIGNAL_TTL_OUT | 6 | TTL output signals are general-purpose outputs. |
signalNumber is the line number of the signal associated with the NI-IMAQ I/O device.
value is a pointer to the state of the NI-IMAQ I/O device. The following values are valid:
| IMAQIO_SIGNAL_STATE_HIGH | Drives the line high when the signal is TRUE. |
| IMAQIO_SIGNAL_STATE_LOW | Drives the line low when the signal is TRUE. |
| IMAQIO_SIGNAL_STATE_HI_Z | Disables output on the line. This option is valid only for TTL output signals. |
Return Value
This function returns 0 on success. On failure, this function returns an error code. For information about the error code, call imaqIOGetErrorText.