Psas
Portland State Aerospace Society
2025 Q3
Electromechanical Recovery System
Kicad
Link to Kicad installation instructions page.
ERS board TODO
[ ] create board files for ERS board as of LV3.1-recovery
[ ] add device tree code to select and to enable MCU debug UART
[ ] add a DTS compatible type or entity to group GPIOs together in primary ERS dts file
Comparing flash invocation ChibiOS versus Zephyr
ChibiOS ERS make file gives:
ted@localhost:~/projects/psas/psas-avionics/lv3.1-recovery/controlSystem/RecoveryBoard/firmware$ make write openocd -f toolchain/oocd.cfg -c "program ./build/recovery-firmware.hex verify reset exit" Open On-Chip Debugger 0.11.0-rc2+dev-00002-g427552c07-dirty (2021-01-30-10:36) Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD Info : clock speed 1000 kHz Info : STLINK V3J8M3B5S1 (API v3) VID:PID 0483:374F Info : Target voltage: 3.323200 Info : stm32f0x.cpu: hardware has 4 breakpoints, 2 watchpoints Info : starting gdb server for stm32f0x.cpu on 3333 Info : Listening on port 3333 for gdb connections target halted due to debug-request, current mode: Thread xPSR: 0xc1000000 pc: 0x08000190 msp: 0x20000200 ** Programming Started ** Info : device id = 0x10006442 Info : flash size = 256kbytes ** Programming Finished ** ** Verify Started ** ** Verified OK ** ** Resetting Target ** shutdown command invoked
To flash Zephyr based app using same openocd call gives:
ted@localhost:~/projects/zephyr-project/psas-ers-firmware/samples/hello-world$ openocd -f /home/ted/projects/psas/psas-avionics/lv3.1-recovery/controlSystem/RecoveryBoard/firmware/toolchain/oocd.cfg -c "program ./build/zephyr/zephyr.hex verify reset exit" Open On-Chip Debugger 0.11.0-rc2+dev-00002-g427552c07-dirty (2021-01-30-10:36) Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD Info : clock speed 1000 kHz Info : STLINK V3J8M3B5S1 (API v3) VID:PID 0483:374F Info : Target voltage: 3.312000 Info : stm32f0x.cpu: hardware has 4 breakpoints, 2 watchpoints Info : starting gdb server for stm32f0x.cpu on 3333 Info : Listening on port 3333 for gdb connections target halted due to debug-request, current mode: Thread xPSR: 0xc1000000 pc: 0x08000190 msp: 0x20000200 ** Programming Started ** Info : device id = 0x10006442 Info : flash size = 256kbytes ** Programming Finished ** ** Verify Started ** ** Verified OK ** ** Resetting Target ** shutdown command invoked
Bindings files and Zephyr
Newer way of doing things with GPIO properties, Zephyr 4.2.0 . . .
- "./dts/bindings/pinctrl/nxp,s32k3-pinctrl.yaml" 115 lines
CAN Bus Sample App
- zephyr/samples/drivers/can/babbling/src
File `zephyr/dts/arm/st/f0/stm32f091.dtsi` defines a node named `can1`. Node is disabled in this overlay file.