DAQmxGetNthTaskReadChannel
int32 DAQmxGetNthTaskReadChannel (TaskHandle taskHandle, uInt32 index, char buffer[], int32 bufferSize);
Purpose
Takes a task, an index, and a user declared buffer with size. It fills out the buffer with the Nth channel as requested by the user in the index. This comes from all the channels in the task. Indexing starts at 1.
Parameters
| Input | ||
| Name | Type | Description |
|---|---|---|
| taskHandle | TaskHandle | The task used in this function. |
| index | uInt32 | The Nth channel to return. The index starts at 1. |
| bufferSize | int32 | The size, in bytes, of buffer. If you pass 0, this function returns the number of bytes needed to allocate. |
| Output | ||
| buffer |
|
The Nth channel in the index. If you pass NULL, this function returns the number of bytes needed to allocate. |
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 negative value indicates an error. For this function, if you pass NULL for the buffer or 0 for the buffer size, this function returns the number of bytes needed to allocate. |