Serial Interface
There are two serial ports available for use. The GPIO port can also be used as a serial port, with less functionality.
| Model | Primary Port | Auxiliary Port | GPIO Port |
|---|---|---|---|
| Boreas | ANPP only over RS232 or RS422. No dynamic pin functions | ANPP over RS232 |
ANPP over RS232, Dynamic Pin Functions |
I/O Ports Available
Baud Rate
The primary and auxiliary port baud rate can be set in the INS Manager. It is important to select a baud rate that is capable of carrying the amount of data that Boreas has been configured to output. See Packet Rates for more details on the data output calculation. The data rate in bytes per second can be calculated by dividing the baud rate by 10. For example if the baud rate is 115,200, the data rate is 11,520 bytes per second. If the selected data rate is insufficient, data may be lost without warning.
Format
The format is fixed at 1 start bit, 8 data bits, 1 stop bit and no parity. See Advanced Navigation Packet Protocol for details on the ANPP protocol.