> To be honest I didn't hear about this LWL (Lightweight Link) before, what a great discovery, nsh directly over JTAG/SWD with no UART!! Thank you Alan!! :-)
There is also RTT console support in NuttX, so you can use JLink debuggers without any UART. Also there are more powerful tools for Segger debuggers in NuttX, like SystemView. Last time I tested LWL it was terribly slow and heavily loaded the CPU - incomparably worse than RTT. Personally I recommend converting STLINK to JLINK if possible with https://www.segger.com/products/debug-probes/j-link/models/other-j-links/st-link-on-board/ or even investing in a dedicated tool from Segger. It's really money worth investment. śr., 22 sty 2025 o 22:45 Tomek CEDRO <to...@cedro.info> napisał(a): > On Wed, Jan 22, 2025 at 3:26 PM Matteo Golin <matteo.go...@gmail.com> > wrote: > > I did not even realize it would be possible to get a shell over the debug > > probe; that would be quite a useful feature for bringing up new boards! I > > might read into that if I have success with the UART later. > > Modern debug probes usually provide JTAG/SWD interface for debug (USB > HID), UART console (USB CDC), and filesystem storage for drag-and-drop > firmware flashing (USB MSC) over single USB connection. Even "dumb" > FT2232 like probes have two channels one for JTAG/SWD and another for > UART console :-) > > Most STLinks provide all 3 functionalities, except the old ones with > small MCU that provides onboard debug only. You can even use most > STM32 devkits as the debug probe (jumpers configurable). Latest > devkits use more powerful MCU for the onboard debug probe than the > target MCU few years back. There is a windoze based utility from STM > that allows you to upgrade firmware and view / configure feature of > various STLink debug probes including those installed on devkits.. it > sometimes solves strange problems too :-) > > To be honest I didn't hear about this LWL (Lightweight Link) before, > what a great discovery, nsh directly over JTAG/SWD with no UART!! > Thank you Alan!! :-) > > https://www.youtube.com/watch?v=A4aCwoABGB8 > > -- > CeDeROM, SQ7MHZ, http://www.tomek.cedro.info >
