.. zephyr:board:: rp2350_zero

Overview

RP2350-Zero, A Low-Cost, High-Performance Pico-Like MCU Board Based On Raspberry Pi Microcontroller RP2350.

Hardware

RP2350A microcontroller chip designed by Raspberry Pi in the United Kingdom
Adopts unique dual-core and dual-architecture design: dual-core Arm Cortex-M33 processor and dual-core Hazard 3 RISC-V processor, flexible clock running up to 150 MHz
520KB of SRAM, and 4MB of on-board Flash memory
Uses a modern and convenient USB Type-C connector
Castellated module allows soldering directly to carrier boards
USB 1.1 with device and host support
Low-power sleep and dormant modes
Drag-and-drop programming using mass storage over USB
29 × multi-function GPIO pins (20× via edge pinout, others via solder points)
2 × SPI, 2 × I2C, 2 × UART, 4 × 12-bit ADC, 24 × controllable PWM channels
Accurate on-chip clock and timer peripherals
Temperature sensor
Accelerated floating-point libraries on-chip
12 × Programmable I/O (PIO) state machines for custom peripheral support

Supported Features

.. zephyr:board-supported-hw::

Pin Mapping

The peripherals of the RP2350 SoC can be routed to various pins on the board. The configuration of these routes can be modified through DTS. Please refer to the datasheet to see the possible routings for each peripheral.

For detailed hardware information, see the RP2350-Zero – Waveshare Wiki <https://www.waveshare.com/wiki/RP2350-Zero>_.

Default Zephyr Peripheral Mapping:

.. rst-class:: rst-columns

UART0_TX : P0
UART0_RX : P1
I2C0_SDA : P4
I2C0_SCL : P5
I2C1_SDA : P6
I2C1_SCL : P7
ADC_CH0 : P26
ADC_CH1 : P27
ADC_CH2 : P28
ADC_CH3 : P29

Programming and Debugging

.. zephyr:board-supported-runners::

Flashing

Using UF2

Here is an example of building the sample for driving the built-in RGB led.

.. zephyr-app-commands:: :zephyr-app: samples/drivers/led/led_strip :board: rp2350_zero/rp2350a/m33 :goals: build :compact:

You can flash the RP2350-Zero with an UF2 file. One option is to use West (Zephyr’s meta-tool). To enter the UF2 flashing mode just keep the BOOT button pressed while you connect the USB port, it will appear on the host as a mass storage device. Alternatively, with the board already connected via USB you can keep the BOOT button pressed, press and release RESET, release BOOT. At this point you can flash the image file by running:

.. code-block:: bash

west flash

Alternatively, you can locate the generated file at build/zephyr/zephyr.uf2 file and simply drag-and-drop to the device after entering the UF2 flashing mode.

References

Official Documentation_
WS2812 datasheet_

.. _Official Documentation: https://www.waveshare.com/wiki/RP2350-Zero .. _WS2812 datasheet: https://cdn-shop.adafruit.com/datasheets/WS2812.pdf