src/board.zig


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pub const PERIPHERAL_BASE = 0xfe000000;
pub const AUX_BASE = PERIPHERAL_BASE + 0x215000;
pub const AUX_IRQ = AUX_BASE;
pub const AUX_ENABLE = AUX_BASE + 0x4;

const Auxiliary = enum(u32) {
    mini_uart = 1,
    spi1 = 2,
    spi2 = 4,
};

pub fn enableAux(aux: Auxiliary) void {
    const mmio_ptr: *volatile u32 = @ptrFromInt(AUX_ENABLE);
    mmio_ptr.* |= @intFromEnum(aux);
}

pub fn disableAux(aux: Auxiliary) void {
    const mmio_ptr: *volatile u32 = @ptrFromInt(AUX_ENABLE);
    mmio_ptr.* &= ~@intFromEnum(aux);
}