MicroPython Forum (Archive)

The posts above SOLVED my problem about how to understand the pin mappings by different vendors.
You simply have to trace out the schematics. No other way.
Thanks a lot AdaFruit! What a load of bananas.

The information above concerning the identities of the Qwiic pins used in MicroPython has been extremely helpful. I seem to have been able to claw my way out of the hole that I was in with this help!

Thanks a lot!

Thanks very much.
I will verify that this works for me.
If so, it will be a big help!
I tried to work out the schematics but I may have just made myself even more confused.
Dave

On to the next obstacle. Yes, the hardware I2C defaults work for the official RP2040 board. But there are now many alternative boards available form Adafruit, Sparkfun and others. Most, if not all, of these offer many multiplexed mappings for the default ports. I am currently working mostly on the S...

Ok, success!
With the standard Raspberry Pi Pico board all my I2C devices appear as expected. (without pull ups or pull downs of any sort).
Now I need to discover the seemingly inscrutable pin mappings of the Qwiic connectors on all the other boards that I've tried.

Thanks!

Dave

I haven't gotten to it yet, but thanks for the reminder.
I had some other duties that interrupted that work.

Dave

Thanks, but I'm still getting nowhere. I've tried the QtPy RP2040, the SparkFun Pro Micro RP2040, the Adafruit Feather RP2040. I have tried each with the specific pin values that I have deduced by reading the rp2 module source code. I have tried several different Qwiic-type sensors and LCD's (all kn...

I'm trying to see the devices on the I2C bus on an AdaFruit QTPy RP2040. I know that there should be devices at 0x18 and 0x20: #========================================================== # i2c-scan.py # # Drive an i2c lcd display through an Adafruit MCP2040 # QT-PY 2040. This file uses the MicroPyth...