ERROR probe_rs::cmd::run: Failed to attach to RTT continuing... about rp-hal

[ithinuel]

RTT is not used by the pwm_blink examples.
This is why the probe does not attach to it.
You can look at defmt-rtt to use with probe-rs for logging.

The rp2040-project-template set it up if you're looking for some reference code.

[1-rafael-1]

thanks for the superquick reply!
Found most of the stuff, fiddled it into working.
I can now flash via the probe, no error message.
The led won't blink though. So maybe this is not for me... :-) There must still be some key thing I am not doing. I'll do some reading around. After all, the thing won't blink even if I flash by bootsel, so... well.
Anyway, thanks again!

[ithinuel]

Feel free to join our matrix channel and we'll be happy to help over there too :)

[jannic]

The led won't blink though

The most common cause for this is that you are using a Pico W. On that board, the LED is not directly connected to the RP2040, so it can't be controlled by toggling a GPIO pin. Instead, it's necessary to communicate with the Wifi coprocessor, which isn't implemented in rp2040-hal.

If that's the case, you have a few options:

• Use embassy-rp, which implements a wifi driver
• Connect an external LED to one of the GPIO pins and use that (don't forget a series resistor)
• Buy an RP Pico (without W)

[1-rafael-1]

@jannic and @ithinuel thank You both for Your hints & tips! I managed now! (I indeed have a Pico W and indeed wiring up on e LED on another Pin did the trick)

Now I begin to know how many things I don't know :-)

So, that being done I will next see if I can set up a new repo and slowly put all the things in place that I need to get to a flashing LED step by step in order to get an idea how this works.
There is a ton in that small example that I do not yet understand and ... well... I'll see if I can manage. Maybe this time I need to pick up a book or tutorial first, unliked MicroPython which one can figure out (to some degree) by just reading examples.

Thanks again, this has been two fun evenings already :-)