RFmxWLAN_SetAttributeF32Array
- Updated2024-10-14
- 2 minute(s) read
RFmxWLAN_SetAttributeF32Array
int32 __stdcall RFmxWLAN_SetAttributeF32Array (niRFmxInstrHandle instrumentHandle, char selectorString[], int32 attributeID, float32 attrVal[], int32 arraySize);
Purpose
Sets the value of an RFmx 32-bit floating point number (float32) attribute. You must provide a char array to serve as a buffer for the value. Pass the number of bytes in the buffer as the arraySize parameter. If you want to call this function just to get the required buffer size, you must pass 0 for arraySize and NULL for the attrVal buffer.
If the current value of the attribute, including the terminating NULL byte, is larger than the size you indicate in the arraySize parameter, the function copies buffer size - 1 bytes into the buffer, places an ASCII NULL byte at the end of the buffer, and returns the buffer size you must pass to get the entire value. For example, if the value is
"123456" and the buffer size is
4, the function places
"123" into the buffer and returns
7.
Parameters
| Input | ||
| Name | Type | Description |
| instrumentHandle | niRFmxInstrHandle | Specifies the instrument session. The RFmx driver obtains this parameter from the RFmxWLAN_Initialize function. |
| selectorString | char[] | Specifies the selector string for the attribute being read. Refer to the Selector String (C/CVI) topic for more information about configuring the selector string. |
| attributeID | int32 | Pass the ID of an attribute. |
| attrVal | float32[] | Pass the value to which you want to set the attribute. |
| arraySize | int32 | Specifies the size of the array. |
Return Value
| Name | Type | Description | ||||||||
| status | int32 | Returns the status code of this operation. The status code either indicates success or describes an error or warning condition. Examine the status code from each call to an RFmx function to determine if an error has occurred. To obtain a text description of the status code and additional information about the error condition, call the RFmxWLAN_GetError function. The general meaning of the status code is as follows:
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