【Hardware information】

】Hardware information

RP2350A-Linux-Pro.pdf

RP2350A-Linux-Pro.step

RP2350A-Linux-Pro.DWG

】Pin Definition

【Sample Code】

Code

rp2350-linux-Image

【How to run the example code】

】Run Python

1】Press Boot to enter firmware update mode. A U disk will appear on your computer.

2】Place firmware.uf2 on the newly displayed U disk. The U disk will automatically disappear after put it.

3】You can then run the *.py program using Thonny software.

】Running C

1】Press boot to enter firmware update mode; a USB drive will appear on your computer.

2】Drag the main.uf2 file from the build folder in the C file to the USB drive and the program will run automatically.

】Burn and run Linux image

First, press and hold the BOOTSEL button on the Pico development board (keep it pressed), then plug the Pico into a USB port on your computer using a USB cable. Finally, release the BOOTSEL button. A disk named "RPI-RP2" will appear on your computer, similar to inserting a USB flash drive.

Install picotool on your Ubuntu Linux system.

Then use picotool in the Linux terminal to flash the firmware.。

psram-bootloader.uf2 is similar to a BIOS/boot loader. First, flash the uf2 file using the following command：

sudo picotool load -fu psram-bootloader.uf2

Then flash the Linux system image using the following command：

sudo picotool load -fxup 0 flash-image.bin

Use a USB-to-serial converter to connect UART-RX to GPIO0 on the Pico2 and UART-TX to GPIO1 on the Pico2.

Open the serial terminal to access the Linux terminal (this system is a minimal Linux system, builtroot, with kernel 6.10).

【Compile Linux source code】

】Clone the project to local

git clone https://github.com/Mr-Bossman/pi-pico2-linux

】Initialize and update the submodules within pico-sdk

git submodule update --init 

】Configure the system

make -C buildroot BR2_EXTERNAL=$PWD/ raspberrypi-pico2_defconfig

】Compile system

make -C buildroot

】Burning kernel

make -C psram-bootloader flash-kernel

(flash-kernel: is a target task defined in the Makefile in this directory, which contains specific burning commands)

】Verification System

Use the USB to serial port tool, connect UART-RX to GPIO0 of pico2, and connect UART-TX pin to GPIO1 of pico2.

Open the serial terminal and enter the Linux terminal.

Note: After flashing the Linux system, if you want to use micropython, you must first execute the following command to erase the firmware before it can be used normally:

sudo picotool erase

Otherwise, you will not be able to flash other uf2 files.