USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

RE: USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

shabaz — Sun, 02 Feb 2025 15:00:57 GMT

New functionality added to the Python interface (and the blog content is updated). See the section titled "Known Devices Database".

It basically allows a lookup of any I2C address against a known list of about 700 IC part names.

A reverse-lookup on sub-strings is also possible, i.e. if you know the part name but not the I2C address.

RE: USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

an79881 — Tue, 28 Jan 2025 20:08:35 GMT

One hint: as the easyadapter.py supersedes the easy_interface.py your description may be updated for using print_data:

from easy_interface import print_data
print_data(buffer)

You don't need this. Instead of print_data(buffer) use adapter.print_data(buffer)

RE: USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

an79881 — Sun, 26 Jan 2025 13:55:18 GMT

IVe seen your project and shortly tested with terminal and also python. Thanks for sharing. It would be helpful to get a full command reference for python. Furthermore, which I2C speed is used actually ? I guess 100kHz. Is there a way to configure I2C speed e.g. 100kHz and 400kHz? As far as I know the Pico supports two (2) I2C interfaces. Is it possible to use with easyadapter in Python? Thanks in advance for your feedback.

RE: USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

shabaz — Sun, 10 Nov 2024 07:31:45 GMT

Project updated!

Now it is possible to use up to eight Pi Pico boards simultaneously, i.e. eight completely independent I2C buses. Each board can be given a different identifier, by shorting particular GPIO pins to ground.

In the Python code, it's now possible to independently control all eight boards using those identifier values. The information is in the blog post.

Also, I added a couple of new commands, which can be used to control any unused GPIO pin for general input/output. For instance, you could use GPIO 5 as an output, and GPIO 6 as an input, and so on.

Since there are about 20 free GPIO pins on the Pi Pico, that means up to around 160 GPIO pins are available, if eight Pi Pico boards were attached.

RE: USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

ggabe — Sun, 25 Aug 2024 18:40:49 GMT

Adding monitoring would be nice, but on second thought, a Logic2 and a cheap CY7C86013 should do the trick. A must have anyway.

RE: USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

shabaz — Fri, 23 Aug 2024 19:43:09 GMT

I tested the USB-to-I2C adapter with this project:

[mention:840c7ae26328414f99aa44b22654c19f:f7d226abd59f475c9d224a79e3f0ec07]

RE: USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

DAB — Thu, 22 Aug 2024 19:06:09 GMT

Nice project.

If I ever get back into looking at I2C devices I will have to build one.

RE: USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

dougw — Thu, 22 Aug 2024 13:40:03 GMT

Handy little project. Thanks for posting.

I guess if needed it could be easily expanded to search for the I2C address....

https://learn.adafruit.com/scanning-i2c-addresses/arduino

RE: USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

genebren — Thu, 22 Aug 2024 13:04:39 GMT

Very cool! I could see this being a very useful device for prototyping with I2C components. Thanks for sharing!

RE: USB-to-I2C with a Pi Pico: Building an Easy I2C Adapter for PC control of I2C Devices

dang74 — Thu, 22 Aug 2024 02:56:21 GMT

Thanks for sharing. This appears to be a nice easy method to interact with I2C devices from your PC.