Pin numbers of I2C interface

[Hristo-Nikodimov-Nenkov]

Greetings.
I have RP Pico like this

I'll use ssd1306 screen and plan to conect it to the I2C on the bottom. I need the Pin numbers of SWDIO and SWCLK.

[GitHubsSilverBullet]

You do realize that you're talking about the Serial Wire Debug interface?
The pins are the same for every RP2040, so it' SWCLK 24, SWDIO 25.

[Hristo-Nikodimov-Nenkov]

This model has LED on Pin 25 ( left of the Type C connector ).

[robert-hh]

SWCLK and SWDIO are on the chip package Pins 24 and 25, not GPIO24 and GPIO25. I could not tell from the datasheet, that SWCLK or SWDIO can be user for a different purpose. Looking at the address space, if could be GPIO30 and GPIO31. But you may have to configure the DBGFORCE Register as well.

Edit: 30 and 31 are not accepted as pin number by machine.Pin().

[Hristo-Nikodimov-Nenkov]

Thanks.

[peterhinch]

To connect to an SSD1306 you need I2C which is available on numerous pins, e.g. GP16 and GP17. Ignore the SWD interface unless you have a specific application for it.

Don't forget the pullup resistors.

[Hristo-Nikodimov-Nenkov]

I intend to use 3.3V and GND from the debug and 14, 15 or 15, 16 for I2C and something between 5KOhm and 10KOhm for pullup.