Debugging Shell
The system provides a serial debugging shell on the RX/TX pins in the debugging connector. The serial configuration is 8N1 at 115200 baud, and the console requires an Enter
key press to be activated.
For Linux systems, Satlab recommends the tio
serial terminal application (https://tio.github.io/) but other applications such as minicom
should also work. When using the Satlab JTAG/serial adapter, the debug shell is typically available on /dev/serial/by-id/usb-FTDI_Dual_RS232-if01-port0
.
A number of timestamped log messages are printed during boot from various logging groups. Additional logging can be enabled at runtime using the trace
commands. The help
command can be used to list available commands and their usage. The installed software version and build information is also printed in the debugging shell during boot.
satlab@satlab:~$ tio -b 115200 /dev/serial/by-id/usb-FTDI_Dual_RS232-if01-port0
[tio 14:29:41] tio v3.7
[tio 14:29:41] Press ctrl-t q to quit
[tio 14:29:41] Connected
Satlab Polaris AIS bootloader v2.0.0
boot slot 0 (2 remaining attempts)
[ 0.000303] system: Copyright (c) 2016-2025 Satlab A/S <satlab@satlab.com>
[ 0.001322] system: boot slot: 0 count: 1 reset cause: general reset
[ 0.002422] system: board serial #208b1b37
[ 0.007717] prop: using stored sys properties
[ 0.009715] prop: using stored demod properties
[ 0.016447] prop: using stored cal properties
Satlab Polaris AIS v2.0.0
[polaris] help
Available commands:
boot Bootloader commands
csp CSP commands
echo Display a line of text
fs File system commands
help Show available commands
history Show previous commands
prop System configuration properties
reboot Reboot system
store Frame store commands
time Time command execution
tm Telemetry commands
trace Trace subcommands
uptime Show system uptime
watch Run command periodically
To show current telemetry values, run the tm show
command. The watch
command can be used to periodically run a command, with the -b
switch enabling screen blanking between updates. Press any key to stop the loop:
[polaris] watch -b tm show
Running command 'tm show' every 1000 ms
Power Channels
FPGA On
RF On
SD-card Off
Ethernet Off
Power Rails
VIN 4875.00 mV 313.00 mA 1513.00 mW
3V3 3325.00 mV 429.00 mA 1428.00 mW
2V0 1995.00 mV 194.00 mA 387.00 mW
1V0 955.00 mV 430.00 mA 411.00 mW
Temperature Sensors
MCU 33.75 C
FPGA core 38.62 C
Power 32.75 C
LNA 34.12 C
ADC 34.31 C
SD-card 33.12 C
Interrupted
To list the last 5 received messages, the store read
command can be used:
[polaris] store read 5
Frame 8800941 ch: 1 type: 26 mmsi: 219000005 power: -84.3 dBm frequency: -2 Hz Flags: True, False, True time: 3797.002499610
6b3436b314ba1139cbe31f14e864f340e7ef000000881b [23]
Frame 8800940 ch: 2 type: 26 mmsi: 219000005 power: -84.3 dBm frequency: 1 Hz Flags: True, False, True time: 3797.002499596
6b3436b314865799327e55b368032a5e2ea20000003908 [23]
Frame 8800939 ch: 3 type: 26 mmsi: 219000005 power: -84.3 dBm frequency: 2 Hz Flags: True, False, True time: 3797.002499558
6b3436b314417967823de9bc5d8836aad7210000005148 [23]
Frame 8800938 ch: 0 type: 26 mmsi: 219000005 power: -84.1 dBm frequency: -2 Hz Flags: True, False, True time: 3797.002499658
6b3436b31432b4026d26c9c594c818eb359c000000b324 [23]
Frame 8800937 ch: 1 type: 26 mmsi: 219000005 power: -84.3 dBm frequency: -2 Hz Flags: True, False, True time: 3796.002499610
6b3436b314ba1139cbe31f14e864f340e7ef000000881b [23]
Dynamic debugging messages can be enabled through the trace
command group. This can for example be used to log all received and transmitted CSP messages. To do so, run trace print csp all
:
[polaris] trace print csp all
[ 55.551903] csp: INP: S 1, D 20, Dp 1, Sp 62, Pr 2, Fl 0x00, Sz 1 VIA: KISS
[ 55.552103] csp: SERVICE: Ping received
[ 55.552210] csp: OUT: S 20, D 1, Dp 62, Sp 1, Pr 2, Fl 0x00, Sz 1 VIA: KISS
Logging of all incoming AIS messages can also be enabled with trace print store info
.