DAQmxSwitchGetMultiRelayPos
int32 DAQmxSwitchGetMultiRelayPos (const char relayList[], uInt32 relayPos[], uInt32 relayPosArraySize, uInt32 *numRelayPosRead);
Purpose
Returns the current position of a set of relays.
Parameters
| Input | |||||||||||
| Name | Type | Description | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| relayList |
|
The set of relays you want to query. | |||||||||
| relayPosArraySize | uInt32 | The size of relayPos. If you pass 0, this function returns the number of samples needed to allocate. | |||||||||
| Output | |||||||||||
| Name | Type | Description | |||||||||
| relayPos |
|
The position of each specified relay. The order of this array corresponds to the order of relayList. If you pass NULL, this function returns the number of samples needed to allocate.
|
|||||||||
| numRelayPosRead |
|
The number of relay positions read by the function. |
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 samples needed to allocate. For example, malloc (n*sizeof(uInt32)); |