A Tetris game coded in C, running directly on bare metal Raspberry Pi 2 (or 3). No OS, direct hardware control for graphics and input.
USPi is an USB driver for bare metal Raspberry Pi written in C. Here is the original repository: USPi
USPi is used with little adaptations in our Low Level Tetris project. The needed files are inside the uspi directory.
The USPi driver has flexibility to decide the Raspberry Pi model, aswell as the architecture (for RPi3, since it can be a 32-bit architecture or 64-bit archutecture).
Also, the prefix for the compiler is flexible to the USPi driver, however we used the arm-none-eabi-gcc (and the other tools necessary - loader, assembler, etc).
Our game is supported on Raspberry Pi 2 and 3. Even though the driver is available for other models, we only managed to test on those two.
The USPi driver is adapted here to work by default for the Raspberry Pi 2. For that, just simply use the makeall script
./makeallIt is also possible to use it for the Raspberry Pi 3 (32-bit architecture):
./makeall RASPPI=3 To remove all the generated files:
./makeall cleanDespite the .img file generating methods described above, there are ready-to-use .img files inside the disk_images directory.
The kernel8-32.img is used for Raspberry Pi 3 (8 from armv8-a, and 32 for the 32-bit architecture), and kernel7.img is for the Raspberry Pi 2 (7 from armv7).
The USPi driver contains logging on the initialization of the driver, showing relevant messages related to the keyboard integration.
For example, for a successful connection:
By default, we left logging disabled. If it is wanted to enable the logging, the makeall command should be the following:
./makeall LOGGING=1 DEBUG=1 Or, for the Raspberry Pi 3:
./makeall RASPPI=3 LOGGING=1 DEBUG=1