PureDOOM for SF32

PureDOOM port for SiFli SF32 chips.

Run on sf32lb52-lchspi-ulp, other board may work but not tested.

How to build

1. Merge sifli-sdk dir modification to your sifli-sdk env. This will modify LCD co5300 to RGB888 instead of RGB565.
2. Run export.ps1 in your sifli-sdk dir to init env.
3. Cd project and run scons --board=sf32lb52-lchspi-ulp

Supported Features:

1. FAT32 SD card for wad file
2. Video display
3. Audio output

Unsupported Features for now:

1. Key input
2. Network

Known issues:

1. FPS low
2. Texture error for walls
3. Crash when display special icon