This project provides a driver for communication between a raspberry pi pico and an mlx90640 thermal sensor.

The api can be found in the include and src folders.

The sample folder contains example code showing how to use the api, along with a header only library ThermalCamera.h that provides a simple to use wrapper.

Hardware setup:

Using the api or sample requries the following hardware setup.

Connect the mlx90640 camera pins as follows:

(mlx90640 pin) -> (pico pin) sda -> gp4 scl -> gp5 gnd -> gnd 3-6v -> 3v3 

Using the api in your project:

git submodule add https://github.com/VianPatel/ThermalCamera-RPI-Pico.git (or git clone if you prefer to not use submodules)

Put the following in your CMakeLists.txt:

# MLX90640 api add_subdirectory("pathToSubmoduleRepoRoot" mlx90640api) target_link_libraries(${CMAKE_PROJECT_NAME} mlx90640-RPI-Pico) 

replace pathToSubmoduleRepoRoot with the path to the submodule root

Compiling sample:

install gcc-arm-none-eabi from:

https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads or with: sudo apt install cmake gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib

git clone https://github.com/VianPatel/ThermalCamera-RPI-Pico.git 

cd ThermalCamera-RPI-Pico 

git submodule update --init pico-sdk/ 

cd pico-sdk 

git submodule update --init lib/tinyusb/ 

cd ../ 

mkdir build 

cd build 

cmake -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -DCMAKE_C_COMPILER:FILEPATH="fullPathToCompiler" -DCMAKE_CXX_COMPILER:FILEPATH="fullPathToCompiler" ../sample 

With fullPathToCompiler filled in, this command might look something like:

cmake -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -DCMAKE_C_COMPILER:FILEPATH="/usr/bin/arm-none-eabi-gcc" -DCMAKE_CXX_COMPILER:FILEPATH="/usr/bin/arm-none-eabi-g++" ../sample 

cmake --build . 

Sample usage:

Copy ThermalCamera.uf2 from the build folder to the pico's root folder

Establish a connection to the pico's com port (this can be done via putty on windows)