______    _______  _______  _______  _   ___  _______         _______  ___   __    _  _______ 
|    _ |  |       ||       ||  _    || | |   ||  _    |       |       ||   | |  |  | ||       |
|   | ||  |    _  ||____   || | |   || |_|   || | |   | ____  |    ___||   | |   |_| ||  _____|
|   |_||_ |   |_| | ____|  || | |   ||       || | |   ||____| |   |___ |   | |       || |_____ 
|    __  ||    ___|| ______|| |_|   ||___    || |_|   |       |    ___||   | |  _    ||_____  |
|   |  | ||   |    | |_____ |       |    |   ||       |       |   |___ |   | | | |   | _____| |
|___|  |_||___|    |_______||_______|    |___||_______|       |_______||___| |_|  |__||_______|

RP2040-Eins Project

The RP2040-Eins project aims to create a replacement for the Arduino UNO R3 or Arduino M0 using the RP2040 MCU.

RP2040-Eins Board

The RP2040-Eins board is a 4-layer design intended to accommodate the popular Raspberry Pi RP2040 MCU within the standard Arduino UNO R3 footprint.

This board is crafted in Germany, and its name, "RP2040-Eins", incorporates the German word "Eins" (pronounced as "eye-ns"), which translates to "one". This name choice reflects the use of the same form-factor as the Arduino "Uno", which means "one" in Italian.

Preview:

You can view the Schematics in PDF format for detailed information.

STEP 3D file is available with pins.

Features:

• Arduino UNO compatible pinout
• Partially compatible with Arduino Nano RP2040 Connect pinout
• Dual-core Cortex-M0+ Raspberry Pi RP2040
• 21 GPIO pins, including 4 analog inputs
• USB Type-C connector
• JTAG and DBG debugging connectors
• LDO-based 5V and 3.3V power supply with a maximum 12V input
• Supports both SOIC and WSON 16MB flash packages
• Includes power, user and RGB LEDs

CAM files, as well as the BOM and CPL files for JLCPCB, are available.

Board Pinout

Following pinout is used for the board:

Board Pin	RP2040 Pin	Function	Notes
D0	GPIO1	UART0 TX
D1	GPIO0	UART0 RX
D2	GPIO25
D3	GPIO15
D4	GPIO16
D5	GPIO17
D6	GPIO18
D7	GPIO19
D8	GPIO20
D9	GPIO21
D10	GPIO5	SS
D11	GPIO7	MOSI
D12	GPIO4	MISO
D13	GPIO6	SCK	LED
D14 A0	GPIO26
D15 A1	GPIO27
D16 A2	GPIO28
D17 A3	GPIO29
D18	GPIO12	SDA
D19	GPIO13	SCL
D20	GPIO22
D21	GPIO23
LED_R	GPIO9
LED_G	GPIO10
LED_B	GPIO11

Version History

This board exists in a single LDO-based flavor. If you want to use a Buck-based version of this board, please contact me directly.

Each version of the board listed below is tagged in the repository. You can use the tag to checkout the repository to the specific version.

v1.0b4 - 09.02.2024

Last testing release.

• Fixed SPI connector pins layout.
• Renamed Arduino pins as Dxx an added GPIO pin names at the back as Gxx.
• Added 2.54mm 3-pin DBG connector.

v1.0b3 - 21.11.2023

Third testing release.

• Moved BOOTSEL button to the edge of the board for easier access when shield is attached.
• Moved QSPI flash closer to the MCU.
• Added Arduino code examples for RGB LED.
• Rearranged routing of several lines.
• Added fancy board name label.
• Added white silkscreen under the LEDs to add light reflection.
• Moved text on the back of the board a bit.
• Removed pull-up resistor from SWCLK line.

v1.0b2 - 04.11.2023

Second testing release.

• Added MOSFETs for RGB LED to make it work similarly to user LED.
• Moved few components around.
• Added QR code to the back of the board.

v1.0b1 - 15.10.2023

Initial release for testing purposes.

Code Examples

Following code examples are available:

Only Adruino SDK:

• src/arduino/rgb_led/rotation_blink.ino - blinks RGB LED in rotation individually
• src/arduino/rgb_led/rotation_fade.ino - fades RGB LED in rotation individually
• src/arduino/rgb_led/rotation_fade2.ino - fades RGB LED in rotation from one color to another

Arduino SDK with FreeRTOS:

• src/arduino/rgb_led/freertos_fade.ino - fades RGB LED in rotation individually using FreeRTOS

Please use latest official version of earlephilhower/arduino-pico and select "RP2040-Eins" board as a target.

Links

• Raspberry Pi RP2040 information page.
• Arduino UNO R3 information page.
• Arduino SDK for RP2040 board.

How to Help

Your contributions as code, resources, or finances are welcome! Please contact me directly via email at andriy.golovnya@gmail.com or through my GitHub profile.

If you'd like to make a financial contribution, you can donate via PayPal or Ko-Fi. Your support is greatly appreciated.

Thanks in advance!