Debugging ShellΒΆ

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/ttyUSB1.

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/ttyUSB1
[tio 14:29:41] tio v1.28
[tio 14:29:41] Press ctrl-t q to quit
[tio 14:29:41] Connected

[    0.000052] system: Copyright (c) 2016-2021 Satlab A/S <satlab@satlab.com>
[    0.000217] system: boot: 1 reset cause: general reset
[    0.000369] system: board serial #30808b36
[    0.001049] prop: using stored cal properties

Satlab SRS-3 v1.0.0 (builder@builder) Aug  1 2018 12:00:00

[srs-3] help
Available commands:
csp             CSP commands
help            Show available commands
history         Show previous commands
prop            System configuration properties
reboot          Reboot system
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:

[srs-3] watch -b tm show
Running command 'tm show' every 1000 ms
Power Channels
Ethernet      Off

Power Rails
VIN             5000.00 mV   110.00 mA   530.00 mW
VREG            3760.00 mV   130.00 mA   491.00 mW
3V3             3335.00 mV   143.00 mA   477.00 mW

Temperature Sensors
MCU               29.75 C
Power             29.56 C
LNA               29.25 C
PA                29.12 C

Transmitter
Frames             1000 Frames
Forward power     30.02 dBm
Reverse power      0.00 dBm

Receiver
Frames             1000 Frames
Last RSSI        -89.50 dBm
Interrupted

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 mask csp all:

[srs-3] trace mask csp all
[   55.551903] csp: INP: S 1, D 21, Dp 1, Sp 62, Pr 2, Fl 0x00, Sz 1 VIA: KISS
[   55.552103] csp: SERVICE: Ping received
[   55.552210] csp: OUT: S 21, D 1, Dp 62, Sp 1, Pr 2, Fl 0x00, Sz 1 VIA: KISS

Logging of all incoming and outgoing spacelink messages can also be enabled with trace mask rx info and trace mask tx info.