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stm32wlx: SWOTrace not working

Aperta
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Valutazione

Difficoltà
4/5
Tempo stimato
3-5 giorni
Idoneità per principianti
35/100
Tipo di issue
Bug
Chiarezza
Abbastanza chiara
Stato di attività
Ferma
Ambito
devtools, embedded-iot

Direzione di ricerca

Start with target/stm32wlx.cfg and the supplied OpenOCD configuration; compare the STM32WLX setup with the referenced STM32WB scripts, focusing on SWO/TPIU initialization for the dual-core target. Reproduce the problem after power removal and verify that SWOTrace works without first enabling it in STM32CubeIDE, with SB8 bridged on the board.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

I have been evaluating the nucleo-wl55jc1 and have deployment and debugging working via openocd (just single core at the moment). I am currently running "xPack Open On-Chip Debugger 0.12.0+dev-01312-g18281b0c4-dirty (2023-09-04-22:31)" a very recent build by xPack.

We use SWOTrace quite extensively, especially on devices that lack UART peripherals, however I have had trouble getting it to work with target/stm32wlx.cfg. My complete configuration derived from other working f1x, f4x, l4x parts : -

`source [find interface/stlink.cfg]

transport select hla_swd

source [find target/stm32wlx.cfg]

itm port 0 on
tcl_port 6666

tpiu create stm32wlx.cpu0.tpiu -dap stm32wlx.dap -ap-num 0
stm32wlx.cpu0.tpiu configure -protocol uart -traceclk 32000000 -output swo_out -formatter off -pin-freq 1000000
stm32wlx.cpu0.tpiu enable
`

Using this configuration SWOTrace only works if I enable and use it with STMCubeIDE first, this only seems to work with the "ST-LINK (ST-LINK GDB Server)" debug probe using the SWV capabilities of the IDE. I couldn't get "ST-LINK (openocd)" to work at all. The device will then work fine with SWOTrace until I remove power to the device. I suspect there are missing register changes in the openocd configuration, this might have something to do with the dual-core nature, but I did look at scripts for other parts like stm32wb but didn't notice anything different.

Note that I found that SB8 on the dev board requires a solder bridge for SWO to be passed to the built-in STLink device.

Lingua principale
C
Stelle
202
Fork
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