43 lines
1.3 KiB
Rust
43 lines
1.3 KiB
Rust
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struct PPU {
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lcdc: LCDControl,
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}
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struct LCDControl {
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lcd_enable: bool, // Bit 7
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window_tile_map_select: bool,
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window_enable: bool,
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tile_data_select: bool,
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bg_tile_map_select: bool,
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sprite_size: bool,
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sprite_enable: bool,
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display_priority: bool, // Bit 0
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}
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impl From<u8> for LCDControl {
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fn from(byte: u8) -> Self {
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Self {
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lcd_enable: (byte >> 7) == 0x01,
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window_tile_map_select: ((byte >> 6) & 0x01) == 0x01,
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window_enable: ((byte >> 5) & 0x01) == 0x01,
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tile_data_select: ((byte >> 4) & 0x01) == 0x01,
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bg_tile_map_select: ((byte >> 3) & 0x01) == 0x01,
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sprite_size: ((byte >> 2) & 0x01) == 0x01,
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sprite_enable: ((byte >> 1) & 0x01) == 0x01,
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display_priority: (byte & 0x01) == 0x01,
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}
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}
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}
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impl From<LCDControl> for u8 {
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fn from(lcdc: LCDControl) -> Self {
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(lcdc.lcd_enable as u8) << 7
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| (lcdc.window_tile_map_select as u8) << 6
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| (lcdc.window_enable as u8) << 5
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| (lcdc.tile_data_select as u8) << 4
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| (lcdc.bg_tile_map_select as u8) << 3
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| (lcdc.sprite_size as u8) << 2
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| (lcdc.sprite_enable as u8) << 1
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| lcdc.display_priority as u8
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}
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}
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