mbus A717 Send.vi
Description
A717 Send.vi is the basic function to send ARINC 717 data. It transmits frmCount subframes from the a717Frames buffer.
| Parameters | ||
|---|---|---|
| error in | in | error conditions that occur before entering the function |
| portHandle | in | reference to the configured port |
| frmCount | in | number of ARINC 717 subframes to send |
| a717Frames | in | ARINC 717 subframes to send |
| portHandle | out | reference to the configured port |
| sentFrmCount | out | number of ARINC 717 subframes actually sent |
| sentWordCount | out | number of ARINC 717 words actually sent |
| 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.
a717Frames is a 1D array of ARINC 717 12-bit words to send. 12-bit words are cast into 16-bit words in 1D array. To help with getting synchronization right, first word of each subframe codes for a subframe ID. Subframe IDs are 0, 1, 2 and 3. Multibus VI replaces subframe ID with correct sync word, as follows:
| Subframe ID | Associated sync word |
|---|---|
| 0 | 0x247 |
| 1 | 0x5B8 |
| 2 | 0xA47 |
| 3 | 0xDB8 |
Example of a717Frames with subframe size of 64 words:
| Index | LabVIEW Data | Data to send |
|---|---|---|
| 0 | 0 | Translates into 0x247 |
| 1 | 0x0001 | Sends 0x001 |
| 2 | 0x0002 | Sends 0x002 |
| 3 | 0x0003 | Sends 0x003 |
| ... | etc. | |
| 64 | 1 | Translates into 0x5B8 |
| 65 | 0x0101 | Sends 0x101 |
| 66 | 0x0102 | Sends 0x102 |
| 67 | 0x0103 | Sends 0x103 |
| ... | etc. | |
| 128 | 2 | Translates into 0xA47 |
| 129 | 0x0201 | Sends 0x201 |
| 130 | 0x0202 | Sends 0x202 |
| 131 | 0x0203 | Sends 0x203 |
| ... | etc. | |
| 192 | 3 | Translates into 0xDB8 |
| 193 | 0x0301 | Sends 0x301 |
| 194 | 0x0302 | Sends 0x302 |
| 195 | 0x0303 | Sends 0x303 |
| ... | etc. | |
| 256 | 0 | Translates into 0x247 |
| 257 | 0x0401 | Sends 0x401 |
| ... | etc. |
Availability
Available in Multibus VI 1.2 and later.
See Also
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Examples
A717 Send Receive.vi A717 Send Receive Raw.vi A717 Send Receive Loop.vi A717 Send Receive Raw Loop.vi