Here is a list of all files with brief descriptions:

[detail level 12]

drivers
adc.c
can.c
controller.c
io.c
menu.c
spi.c
timer.c
uart.c
xmem.c
include
adc.h	ADC memory-mapped interface
can.h	CAN driver
controller.h	Handles CAN communication for game control, joystick, and buttons
fonts.h
io.h	Driver for joystick, buttons, and OLED
log.h	Logging interface for debug messages
mcp.h
menu.h	Hierarchical OLED menu system with navigation and page handling
spi.h	SPI driver
timer.h	Timer driver (for ADC clock)
uart.h	UART communication driver
utils.h	Utility and helper functions for joystick, LED debugging, and mapping
xmem.h	External SRAM interface for ATmega microcontrollers
fonts.c
main.c	Main entry point for the TTK4155 Node 1 firmware
utils.c