EGSE Shell

The system provides a serial Electrical Ground Support Equipment (EGSE) shell on the RX/TX pins in the P2 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 serial adapter, the EGSE 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 EGSE shell during boot.

satlab@satlab:~$ tio -b 115200 /dev/serial/by-id/usb-FTDI_Dual_RS232-if01-port0
[tio 09:49:45] tio v3.2
[tio 09:49:45] Press ctrl-t q to quit
[tio 09:49:45] Connected

Satlab SRX-8 bootloader v1.1.0
boot slot 0 (2 remaining attempts)

[    0.000000] system: Copyright (c) 2025 Satlab A/S <satlab@satlab.com>
[    0.008000] system: boot slot: 0 count: 1
[    0.024000] prop: using stored sys properties
[    0.881000] buc: firmware version 1.0.1

Satlab SRX-8 v1.1.0

[srx-8] help
Available commands:
boot            Bootloader commands
csp             CSP commands
echo            Display a line of text
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:

Running command 'tm show' every 1000 ms
Power Rails
VIN              14946 mV     315 mA    4707 mW   32.00 C
3V8               3809 mV     923 mA    3513 mW   32.25 C
MCU                847 mV
FPGA               853 mV

Temperature Sensors
VIN              32.00 C
MCU              34.60 C
FPGA             32.79 C
MEM              32.12 C
DAC              26.03 C
Top              31.75 C
Bottom           32.06 C

BUC Power Rails
Buck converter   14946 mV      16 mA     235 mW   31.87 C
Boost converter  14950 mV       0 mA       7 mW   31.75 C
Driver PSU           0 mV       0 mA       0 mW   31.75 C
PA PSU               0 mV       0 mA       0 mW   32.50 C

BUC Temperature Sensors
Board            31.93 C
Driver           31.75 C
PA               31.75 C
PA die            0.00 C

Transmitter
BBFRAMEs             0 frames
GSE PDUs             0 frames
Forward power     0.00 dBm
Reflected power   0.00 dBm
BUC gain          0.00 %
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:

[srx-8] trace mask csp all
[ 2480.670000] csp: INP: S 2, D 28, Dp 1, Sp 62, Pr 2, Fl 0x00, Sz 1 VIA: KISS
[ 2480.679000] csp: SERVICE: Ping received
[ 2480.686000] csp: OUT: S 28, D 2, Dp 62, Sp 1, Pr 2, Fl 0x00, Sz 1 VIA: KISS