Seeed Studio XIAO RP2040

Tags: chip:rp2040

The Seeed Studio Xiao RP2040 is a general purpose board supplied by Seeed Studio and it is compatible with the Raspberry Pi RP2040 ecosystem as they share the same RP2040 chip.

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Features

  • RP2040 microcontroller chip

  • Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz

  • 264KB of SRAM, and 2MB of onboard Flash memory

  • 11 digital pins, 4 analog pins, 11 PWM Pins

  • 1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface

  • USB Type-C interface

  • 1 user LED, 1 power LED, two LEDs for serial port downloading, 1 RGB LED

  • 1 RESET button, 1 BOOT button

LEDs

There are 2 LEDs available for user:

  • A RGB LED connected to GPIO16 (PIN_LED_G), GPIO17 (PIN_LED_R), GPIO25 (PIN_LED_B).

  • A NeoPixel RGB LED connected to GPIO11 (NEOPIXEL_POWER) and GPIO12 (PIN_NEOPIXEL).

Buttons

There are 2 buttons available:

A RESET button and a BOOT button, which if held down when power is first applied to the board, will cause the RP2040 to boot into programming mode and appear as a storage device to a computer connected via USB. Saving a .UF2 file to this device will replace the Flash ROM contents on the RP2040.

Pin Mapping

Pads numbered anticlockwise from USB connector.

Pad

Signal

Notes

0

GPI26

D0/A0

1

GPI27

D1/A1

2

GPI28

D2/A2

3

GPI29

D3/A3

4

GPIO6

D4/SDA

5

GPIO7

D5/SCL

6

GPIO0

Default TX for UART0 serial console

7

GPIO1

Default RX for UART1 serial console/CSn

8

GPIO2

D8/SCK

9

GPIO3

D10/MOSI

10

GPIO4

D9/MicroSD

11

3V3

Power output to peripherals

12

Ground

13

VIN

+5V Supply to board

Power Supply

For general I/O pins:

Working voltage of MCU is 3.3V. Voltage input connected to general I/O pins may cause chip damage if it’ higher than 3.3V.

For power supply pins:

The built-in DC-DC converter circuit able to change 5V voltage into 3.3V allows to power the device with a 5V supply via VIN-PIN and via the USB connector.

Installation & Build

For instructions on how to to install the build dependencies and create a NuttX image for this board, consult the main RP2040 documentation.

Configurations

All configurations listed below can be configured using the following command in the nuttx directory (again, consult the main RP2040 documentation):

$ ./tools/configure.sh seeed-xiao-rp2040:<configname>

nsh

Basic NuttShell configuration (console enabled in UART0, at 115200 bps).

userled

This is an nsh configuration with added support for user LEDs.

usbnsh

Basic NuttShell configuration using CDC/ACM serial (console enabled in USB Port, at 115200 bps).