Raspberry-Pi-Pico-Kit-B

Raspberry Pico

Raspberry Pi Pico is a low-cost, high-performance microcontroller board with flexible digital interfaces. It incorporates Raspberry Pi's own RP2040 microcontroller chip, with a dual-core Arm Cortex M0+ processor running up to 133 MHz, embedded 264KB of SRAM, and 2MB of onboard Flash memory, as well as 26x multi-function GPIO pins.
For software development, either Raspberry Pi's C/C++ SDK or the MicroPython is available. There are also complete development resources and tutorials to help you get started easily, and integrate it into end products quickly.

Details of the Start Kit

Raspberry Pi Pico with pre-soldered header x1
Pico-LCD-1.14 x 1
Pico-10DOF-IMU x 1
Breadboard x1
1*3PIN yellow pin header x 1
Pico-Dual-Expander x 1
USB-A to micro-B cable x 1
Jumper wires x 1

Features

RP2040 microcontroller chip designed by Raspberry Pi in the United Kingdom.
Dual-core Arm Cortex M0+ processor, a flexible clock running up to 133 MHz.
264KB of SRAM, and 2MB of onboard Flash memory.
Castellated module allows soldering direct 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.
26 × 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 I/O (PIO) state machines for custom peripheral support.

Pinout

Dimensions

User Guides for MicroPython

Flash Firmware

Download Testing Firmware to your computer and extract it.
- There are two uf2 files, the pico_micropython_20210121.uf2 file is MicroPython firmware.
Press the button on the Pico board, connect the Pico to the USB port of the computer via the Micro USB cable, and then release the button.
- After connecting, the computer will automatically recognize a removable disk (RPI-RP2).

Copy and drag the firmware file downloaded earlier to the RPi-RP2 mobile disk.
After the copy is completed, Pico will automatically restart, and after the automatic restart, pico will be recognized as a virtual serial port.

【Note】 1. Is the mobile disk not automatically recognized after connecting to Pico?
▶ Check that the BOOTSEL button is not pressed or released in the middle.
▶ The Micro USB cable used must be a data cable, and the USB cable that can only be used for power supply cannot be used.
2. You can also operate on the Raspberry Pi, the operation steps are the same, also connect the pico to the Raspberry Pi, and then drag the firmware to the mobile disk.

Software Environment Debugging

Windows

To facilitate the development of Pico boards using MicroPython on the computer, it is recommended to download Thonny IDE.

Download Thonny IDE and follow the steps to install
- Thonny IDE download link (Windows version)
- Thonny official website
After the installation is completed, the first time you need to configure the language and motherboard environment because we are using Pico, so pay attention to selecting the Raspberry Pi option.

Raspberry

If you want to control Pico on Raspberry Pi, please refer to this configuration step.
Current Raspberry Pi systems come with Thonny IDE.
But if Thonny is not updated to the latest version, there is no Pico support package, and you need to update Thonny to the latest v3.3.3 version.

Enable a terminal and enter the following command to update thonny.

sudo apt upgrade thonny

Open Thonny IDE (click Raspberry logo -> Programming -> Thonny Python IDE).
Select Tools -> Options... -> Interpreter.
Select MicroPython (Raspberry Pi Pico and ttyACM0 port.

LED Control Demo

Connect the Pico to the computer (without pressing any keys), if you have not flashed MicroPython before, please follow the #Flash Firmware operation.
Select Tools -> Options... -> Interpreter.
Select Raspberry Pi Pico in the interpreter options (be careful to download the latest version of Thonny, otherwise there is no option).
port selection.
- On the computer, the port is selected as, after connecting to Pico, the COM port recognized by the computer.
- On the Raspberry Pi, the port is identified as /dev/ttyACM0.
Then confirm.
After confirmation, you can see that there will be multiple Pico information in the command line interface, and now you can enter the MicroPython program here to control the Pico.

Looking at the pin diagram of Pico, we know that the control pin of Pico's on-board LED is GPIO25, here we try to control the on-board LED.
Run the following code in sequence in Thonny:

>>> from machine import Pin
>>> led = Pin(25, Pin.OUT)
>>> led.value(1)
>>> led.value(0)

After running the code in sequence, you can see that the Pico onboard LED lights are turned on and then off.
【Note】
If you want to know more about the functions of Pico Micropython, you can refer to Pico Python SDK Manual.

Hardware Connection

Please take care of the direction when you connect Pico, an USB port is printed to indicate. You can also check the pin of Pico and the LCD board when connecting.
You can connect the display according to the table.

LCD	Pico	Description
VCC	VSYS	Power Input
GND	GND	GND
MPU.INT	GP2	INT pin of ICM20948
LPS.INT	GP3	INT pin of LPS22HB
SDA	GP6	SDA pin of I2C
SCL	GP7	SCL pin of I2C
FSYNC	GP22	FSYNC pin of ICM20948

Connect the expansion board

Environment Building

Please refer to Here.

Download the examples

Open a Raspberry Pi terminal and run the following commands:

sudo apt-get install p7zip-full
cd ~
sudo wget  https://files.waveshare.com/upload/c/c5/Pico-Kit-B-code.7z
7z x Pico-Kit-B-code.7z -o./Pico-Kit-B-code
cd ~/Pico-Kit-B-code
cd c/build/

How to use

C Example

Go to the directory of the C example and build it.

cd ~/Pico-Kit-B-code/c/

Create the build folder and enter it. add the SDK:

../../pico-sdk #should be the path of the SDK according to the actual situation.

We have created the build folder in the example, you can just enter it.

cd build
export PICO_SDK_PATH=../../pico-sdk
(Note: Please check if you set the correct path of SDK, it may be different for different users)

Run cmake to generate the Makefile

cmake ..

Run make to build the example, it will take minutes.

make -j9

uf2 is generated after building.
Press and hold the button of the Pico board, and then connect the Pico to your Raspberry Pi or PC by USB cable, then release the button. Then copy the main.uf2 file which is saved in the build folder to the Pico (It should be recognized as a portable drive, which is named RPI-RP2).

Python example

Work with windows PC

1. Press and hold the BOOTSET button of Pico, and connect the Pico to your PC by USB cable. Release the button if the Pico is recognized as a portable drive.
2. Copy the rp2-pico-20210205-unstable-v1.14-8-g1f800cac3.uf2 from the Python directory to the Pico.
3. Open Thonny IDE (Note: Please use the newest version).
4. Click Tools -> Options -> Interpreter and choose the Port of Pico (you can check it in the Device Manager).

5. Click File -> Open..., choose Raspberry-Pi-Pico-Kit-B.py, and run it.

Working with Raspberry Pi

1. The steps to download the firmware is the same as Windows PC. Copy the rp2-pico-20210205-unstable-v1.14-8-g1f800cac3.uf2 to Pico.
2. Open the Thonny IDE in Raspberry Pi（Menu -> Programming -> Thonny Python IDE, you can check the version information in Help -> About Thonny to make sure that it is the version that supports Pico.
3. Click Tools -> Options... -> Interpreter to choose the MicroPython(Raspberry Pi Pico and the ttyACM0 port.

Please update the Thonny IDE if the pre-installed one doesn't support Pico.

sudo apt upgrade thonny

3. Click File -> Open...-> Pico-Kit-B-code/python/Raspberry-Pi-Pico-Kit-B.py and run the codes.

Expected result

1. The LCD keeps blank if you didn't run the demo codes;
2. After running the codes, the LCD turns on and displays the data which is collected by the Pico-10DOF-IMU.

Pico Quick Start

Firmware Download

MicroPython Firmware Download

C_Blink Firmware Download

Text Tutorial

Introduction

Raspberry Pi Pico

MicroPython Series

C/C++ Series

For C/C++, it is recommended to use Pico VS Code for development. This is a Microsoft Visual Studio Code extension designed to make it easier for you to create, develop, and debug projects for the Raspberry Pi Pico series development board. Whether you are a beginner or an experienced professional, this tool can help you confidently and easily develop Pico. Below we will introduce how to install and use the extension.

Official website tutorial: https://www.raspberrypi.com/news/pico-vscode-extension/.
This tutorial is applicable to Raspberry Pi Pico, Pico2, and our company's RP2040 and RP2350 series development boards.
The development environment defaults to Windows as an example. For other environments, please refer to the official website tutorial for installation.

Arduino IDE Series

Install Arduino IDE

Download the Arduino IDE installation package from Arduino website.
Just click on "JUST DOWNLOAD".
Click to install after downloading.
Note: You will be prompted to install the driver during the installation process, we can click Install.

Install Arduino-Pico Core on Arduino IDE

Open Arduino IDE, click the File on the left corner and choose "Preferences".

Add the following link in "Additional boards manager URLs", then click OK.

https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json

Note: If you already have the ESP32 board URL, you can separate the URLs with commas like this:

https://dl.espressif.com/dl/package_esp32_index.json,https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json

Click on Tools -> Board -> Board Manager -> Search for pico, it shows installed since my computer has already installed it.

Upload Demo At the First Time

Press and hold the BOOTSET button on the Pico board, connect the Pico to the USB port of the computer via the Micro USB cable, and release the button when the computer recognizes a removable hard drive (RPI-RP2).
Download the demo from #Resource, open the D1-LED.ino under arduino\PWM\D1-LED path.
Click Tools -> Port, remember the existing COM, do not need to click this COM (different computers show different COM, remember the existing COM on your computer).
Connect the driver board to the computer with a USB cable, then click Tools -> Ports, select uf2 Board for the first connection, and after the upload is complete, connecting again will result in an additional COM port.
Click Tools -> Board -> Raspberry Pi Pico/RP2040 -> Raspberry Pi Pico.
After setting, click the right arrow to upload.
- If you encounter problems during the period, you need to reinstall or replace the Arduino IDE version, uninstall the Arduino IDE clean, after uninstalling the software you need to manually delete all the contents of the folder C:\Users\[name]\AppData\Local\Arduino15 (you need to show the hidden files in order to see it) and then reinstall.

Open Source Demo

Resource

Example Demo

Official Document

Pico W

Firmware

Pico W MicroPython Firmware

Pico

User Manual

Schematic & Datasheet

Related Books

Raspberry Pi Open-source Demo

Development Software

Demo Codes

Demo codes for Raspberry-Pi-Pico-Kit-B

Related Product

Support

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