DAQmxReadDigitalScalarU32
int32 DAQmxReadDigitalScalarU32 (TaskHandle taskHandle, float64 timeout, uInt32 *value, bool32 *reserved);
Purpose
Reads a single 32-bit integer sample from a task that contains a single digital input channel. Use this function for devices with up to 32 lines per port. The sample is returned in unsigned integer format.
Parameters
| Input | ||
| Name | Type | Description |
|---|---|---|
| taskHandle | TaskHandle | The task to read the sample from. |
| timeout | float64 | The amount of time, in seconds, to wait for the function to read the sample. The default value is 10.0 seconds. To specify an infinite wait, pass -1 (DAQmx_Val_WaitInfinitely). This function returns an error if the timeout elapses. A value of 0 indicates to try once to read the requested sample. If the entire requested sample is read, the function is successful. Otherwise, the function returns a timeout error and returns what was actually read. |
| reserved |
|
Reserved for future use. Pass NULL to this parameter. |
| Output | ||
| Name | Type | Description |
| value |
|
The sample read from the task. |
Return Value
| Name | Type | Description |
|---|---|---|
| status | int32 | The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error. |