pico-usb-input-tester

WIP - An RP2040 based input latency tester

Description

This is a repository that contains code and instructions for building a system to measure input latency. The code provided is designed to run on the Raspberry Pi Pico or other RP2040 based boards and is written in C.

Getting Started

Dependencies

• Raspberry Pi Pico C/C++ SDK
• Pico-PIO-USB
• Text Editor (Visual Studio Code, Notepad++, Vim, Emacs, etc.)

Build

1. Install CMake (at least version 3.13), and GCC cross compiler

Debian/Ubuntu

sudo apt install cmake gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib

Arch

sudo pacman -Sy minicom openocd cmake arm-none-eabi-gcc arm-none-eabi-newlib gcc

2. Clone the Raspberry Pi Pico SDK to your local computer

mkdir ~/pico
cd ~/pico
git clone https://github.com/raspberrypi/pico-sdk.git
cd pico-sdk
git submodule update --init

3. Clone pico-usb-input-tester to your local computer

git clone https://github.com/n-i-x/pico-usb-input-tester
cd pico-usb-input-tester
git submodule update --init

4. Create build folder in root

mkdir build
cd build

5. Set the Pico-SDK path and Build Platform according to your configurationa and board

export PICO_SDK_PATH={path_to_pico-sdk} 
export PICO_BOARD={board}

1. Make and Build

cmake ..
make -j4

After a successful build, the generated binary file pico-usb-input-tester.uf2 will be located in the build directory.

Installation

Flash the program onto the Raspberry Pi Pico:

1. Push and hold the BOOTSEL button
2. Plug the Pico into the USB port of the computer
3. Raspberry Pi Pico will mount as a Mass Storage Device called RPI-RP2
4. Drag and Drop or Copy and Paste the pico-usb-input-tester.uf2 UF2 Binary into the RPI-RP2 Drive

Executing

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code blocks for commands

Help

Any advise for common problems or issues.

command to run if program contains helper info

Authors

• n-i-x

Version History

• 0.1
  • Proof of Concept