Article: NuttX RTOS for PinePhone: Feature Phone UI in LVGL, Zig and WebAssembly

[WhiteHexagon]

Code:

pub const I2S_PCM0 = IRQ(45); pub const I2S_PCM1 = IRQ(46); pub const I2S_PCM2 = IRQ(47); pub const PG_EINT = IRQ(49); pub const TIMER0 = IRQ(50); pub const TIMER1 = IRQ(51); fn IRQ(comptime irq: u8) type {     const cache = struct {         var lookup: [IRQ_LIMIT]*const fn () void = undefined;         pub export fn zigInterruptHandler(id: c_int) void {             const handler = lookup[@intCast(u8, id)];             handler();             debug.green(true);         }     };     return struct {         const irqNo: u8 = irq;         var enabled: bool = false;         pub fn enable(handler: *const fn () void) void {             if (!enabled) {                 c.enableIRQ(irqNo);                 cache.lookup[irqNo] = handler;                 enabled = true;             }         }     }; }

Oh and the code if you are interested.  It works if I move the exported fn and lookup table up to the file level, but since that is also just a 'struct' in Zig, I thought this might work.