CircuitPython Libraries on any Computer with Raspberry Pi Pico (original) (raw)

A simple way to get I2C, SPI, GPIO, ADC, PWM, and NeoPixel support on any PC with USB.

published May 01, 2021, last edited November 07, 2024
last major update May 26, 2021

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• Overview

• Running CircuitPython Code without CircuitPython

• Setup for Pico

• Setup on PC

  • Windows
  • Mac OSX
  • Linux

• Post Install Checks

• Pinout

• Examples

  • GPIO
  • ADC
  • PWM
  • I2C
  • SPI
  • NeoPixel

• Other RP2040 Boards

• Single page

• Text View

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54

Beginner

Project guide

Pinout

While the Raspberry Pi Pico allows the I2C and SPI pins to appear in multiple locations, the u2if firmware fixes these locations to specific pins.

Power Pins

• VBUS - micro-USB input voltage
• VSYS - main system input voltage
• 3V3 - regulated 3.3V output, 300mA max
• GND - main ground reference
• AGND - ground reference for GP26-29 and ADC0 and ADC1

GPIO Pins

• GP0 to GP28 - General Purpose Input Output (GPIO) as well as Pulse Width Modulation (PWM)

I2C Pins

• SCL0 - I2C port 0 clock
• SDA0 - I2C port 0 data
• SCL1 - I2C port 1 clock
• SDA1 - IC2 port 1 data

SPI Pins

• SCLK0 - SPI port 0 clock
• MOSI0 - SPI port 0 data out
• MISO0 - SPI port 0 data in
• SCLK1 - SPI port 1 clock
• MOSI1 - SPI port 1 data out
• MISO1 - SPI port 1 data in

ADC Pins

• ADC0 - Analog to Digital Converter (ADC) 0
• ADC1 - Analog to Digital Converter (ADC) 1

You are correct in noting that ADC2 is not exposed, we are not sure why!

Page last edited March 08, 2024

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