Waveshare RP2040 Zero

Tags: chip:rp2040

The Waveshare RP2040 Zero is a general purpose board supplied by Waveshare.

../../../../../_images/WaveshareRP2040Zero.png

Features

  • RP2040 microcontroller chip

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

  • 264kB of SRAM, and 2MB of on-board Flash memory

  • Castellated module allows soldering direct to carrier boards

  • USB 1.1 Host and Device support

  • Low-power sleep and dormant modes

  • Drag & drop programming using mass storage over USB

  • 20 multi-function GPIO pins

  • 2× SPI, 2× I2C, 2× UART, 3× 12-bit ADC, 16× controllable PWM channels

  • Accurate clock and timer on-chip

  • Temperature sensor

  • Accelerated floating point libraries on-chip

  • 8 × Programmable IO (PIO) state machines for custom peripheral support

Buttons and LEDs

A ws2812 (NeoPixel) smart RGB LED controlled by GPIO16 (data).

There is a BOOT button which if held down when power is first applied or the RESET button is pressed will cause the RP2040 to boot into program mode and appear as a storage device to a USB connecter. 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

1

5V

2

Ground

3

3.3V

4

GPIO29

5

GPIO28

6

GPIO27

7

GPIO26

8

GPIO15

9

GPIO14

10

GPIO13

11

GPIO12

12

GPIO11

Default TX for SPI1

13

GPIO10

Default SCK for SPI1

14

GPIO9

Default CSn for SPI1

15

GPIO8

Default RX for SPI1

16

GPIO7

Default SCL for I2C1

17

GPIO6

Default SDA for I2C1

18

GPIO5

Default SCL for I2C0

19

GPIO4

Default SDA for I2C0

20

GPIO3

21

GPIO2

22

GPIO1

Default RX for UART0 serial console

23

GPIO0

Default TX for UART0 serial console

Power Supply

The Waveshare RP2040 Zero can be powered via the USB connector, or by supplying +5V to pin 1.

The RP2040 runs on 3.3 volts. This is supplied by an onboard voltage regulator.

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 waveshare-rp2040-zero:<configname>

gpio

NuttShell configuration (console enabled in UART0, at 115200 bps) with GPIO examples.

nsh

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

usbnsh

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

ws2812

Basic NuttShell configuration with WS2812 driver and example enabled. Console is enabled over USB at 115200 bps.