mbus A717 Port Config.vi
Description
A717 Port Config function sets up the selected port configuration. This function opens a port and provides a portHandle. This portHandle must be wired to all subsequent VIs that uses this port.
| Parameters | ||
|---|---|---|
| error in | in | error conditions that occur before entering the function |
| sessionHandle | in | reference to the current Multibus session block handle |
| portNumber | in | port number to configure |
| bitEncoding | in | the way bits are encoded: Harvard Biphase or Bipolar RZ |
| subFrameSize | in | subframe size in number of words |
| rawMode | in | Must be kept to False (default) for standard ARINC 717 subframe-based receive method. Can be set to True (advanced), to enabled raw mode. More information is provided below. |
| loopback | in | ARINC 717 words are looped back from Tx port to the Rx port |
| sessionHandle | out | reference to the current Multibus session block handle |
| portHandle | out | reference to the configured port |
| error out | out | error information |
| function return | out | function execution status |
Handle parameters are available as input and output. Output is a copy of the input and may be used to daisy chain successive VIs and reduce wire density.
| Receive mode | |
|---|---|
| Standard | 12-bit words are assembled into subframes with correct subFrameSize. Four synchronization words must be detected before data starts to be returned to user application. Each subsequent subframe must have a valid synchronization word to be returned to user application |
| Raw mode | Data stream is parsed into 12-bit long words and returned to user application as it is. There is no synchronization word needed and no subframe assembled. |
Note that both modes require to correctly set subFrameSize to adjust reading speed.
Availability
Available in Multibus VI 1.2 and later.