imaqIOGetAttribute
Format
rval = imaqIOGetAttribute(IMAQIO_SESSION id, IMAQIOAttribute attribute, unsigned long *value);
Purpose
Reads one of the NI-IMAQ I/O device attributes.
Parameters
| Name | Type | Direction |
| id | IMAQIO_SESSION | input |
| attribute | IMAQIOAttribute | input |
| value | unsigned long* | output |
Parameter Discussion
id is the ID of the session to get an attribute for.
attribute is the attribute to retrieve. The following values are valid:
| IMAQIO_ATTRIBUTE_PRODUCT_SELECT_CURRENT | Gets the value of the current product selection line. ISO Inputs 4 thru 0 are the product selection lines. |
| IMAQIO_ATTRIBUTE_PRODUCT_SELECT_LATCHED | Gets the value of the currently latched product selection line. ISO Inputs 4 thru 0 are the product selection lines. ISO Input 5 latches in the data on ISO Inputs 4 thru 0. |
| IMAQIO_ATTRIBUTE_QUADRATURE_ENCODER | Gets the value of the quadrature encoder. The quadrature encoder uses ISO Input 6 for its Phase A input and ISO Input 7 for its Phase B input. |
| IMAQIO_ATTRIBUTE_WATCHDOG_STATUS | Gets the value of the watchdog status. 0 indicates that no errors have occurred, and 1 indicates that a timeout occurred. |
| IMAQIO_ATTRIBUTE_ISOPOWER_PRESENT | Gets the ISO power status. A value of 1 indicates that ISO power is present. A value of 0 indicates that ISO power is not present. |
value is a pointer to the value of the attribute retrieved.
Return Value
This function returns 0 on success. On failure, this function returns an error code. For information about the error code, call imaqIOGetErrorText.