The firmware for the RP2040 microcontroller can be found in the modchipfw folder. You can compile this by running the following commands from within the modchipfw folder:
mkdir build && cd build
cmake ..
make
To update the firmware on the RP2040 you can simply press the button on the modchip before plugging it in. It should now enumerate as a removable disk, copy the utglitcher.uf2 to this removable disk to update the firmware.
In the Python folder you can find pulsegen.py, this file contains the PicoPulseGen class that handles communication with the modchip.
The example.py script is a basic example to demonstrate how you can interact with the modchip and how you can set glitch parameters.