NIHSDIO_ATTR_START_TRIGGER_TYPE
Specific Attribute
| Data type |
Access | Applies to | Coercion | High-Level Functions |
|---|---|---|---|---|
| ViInt32 | R/W | N/A | None | niHSDIO_ConfigureDigitalEdgeStartTrigger niHSDIO_ConfigurePatternMatchStartTrigger niHSDIO_ConfigureSoftwareStartTrigger niHSDIO_DisableStartTrigger |
Description
Use this attribute to specify whether you want the Start trigger to be a digital edge, pattern match, or software trigger. You can also choose NIHSDIO_VAL_NONE as the value for this attribute.
Defined Values:
| NIHSDIO_VAL_NONE (28) | The data operation starts immediately after you call niHSDIO_Initiate. |
| NIHSDIO_VAL_DIGITAL_EDGE (29) | The data operation does not start until a digital edge is detected. The source of the digital edge is specified with NIHSDIO_ATTR_DIGITAL_EDGE_START_TRIGGER_SOURCE, and the active edge is specified with NIHSDIO_ATTR_DIGITAL_EDGE_START_TRIGGER_EDGE. |
| NIHSDIO_VAL_SOFTWARE (32) | The data operation does not start until a software trigger occurs. You can assert the software trigger by calling niHSDIO_SendSoftwareEdgeTrigger with NIHSDIO_VAL_START_TRIGGER as the trigger name. |
| NIHSDIO_VAL_PATTERN_MATCH (31) | The data operation does not take effect until a specific data pattern matching condition is met. Configure the condition by setting NIHSDIO_ATTR_PATTERN_MATCH_START_TRIGGER_PATTERN and NIHSDIO_ATTR_PATTERN_MATCH_START_TRIGGER_WHEN. This is valid only for acquisition sessions. |