const cpu = @import("cpu.zig");
const gpio = @import("gpio.zig");

const rcc: *[39]u32 = @ptrFromInt(0x40021000);
const gpioa = gpio.gpioa;

export fn _start() callconv(.C) noreturn {
    cpu.interrupt_disable();

    rcc[19] |= 1; // gpioaen
    gpioa.set_mode(5, .output);

    while (true) {
        gpioa.toggle(5);
    }
}

export fn fault_handler() callconv(.C) void {
    while (true) {}
}