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Sample explanations

void I2C_Reset(void)
{
    // Release SCL and SDA lines and re-enable module
    //
    TWCR = 0;
    SetBit(TWCR, TWEA);
    SetBit(TWCR, TWEN);
}

Show explanation

The function is called "I2C_Reset" which means it resets the I2C bus.
The first line of code sets the value of a register to zero.
This register is named "TWCR".
It's important to note that this register has two bits: one for setting the clock rate (TWEA), and one for enabling/disabling the module (TWEEN).
After these two lines are executed, both bits will be set to zero.
The code sets the TWCR register to 0, which disables the module.
The code then releases the SCL and SDA lines of the I2C bus, re-enabling it.

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static bool smp_start_ap(uint32_t lapic_id, struct gdtr *gdtr,

                         bool longmode, bool lv5, uint32_t pagemap,

```
                         bool x2apic) {
```

    size_t trampoline_size = (size_t)_binary_smp_trampoline_bin_end

                           - (size_t)_binary_smp_trampoline_bin_start;

```
    // Prepare the trampoline
```
```
    static void *trampoline = NULL;
```
```
    if (trampoline == NULL) {
```

        trampoline = conv_mem_alloc(trampoline_size);

        memcpy(trampoline, _binary_smp_trampoline_bin_start, trampoline_size);

```
    }
```

    static struct trampoline_passed_info *passed_info = NULL;

```
    if (passed_info == NULL) {
```

        passed_info = (void *)(((uintptr_t)trampoline + trampoline_size)

                               - sizeof(struct trampoline_passed_info));

```
    }
```

    passed_info->smp_tpl_info_struct = (uint32_t)(uintptr_t)info_struct;

    passed_info->smp_tpl_booted_flag = 0;

    passed_info->smp_tpl_pagemap     = pagemap;

    passed_info->smp_tpl_target_mode = ((uint32_t)x2apic << 2)

```
            | ((uint32_t)lv5 << 1)
```
```
    passed_info->smp_tpl_gdt  
```
```
    asm volatile ("" ::: "memory");
```
```
    // Send the INIT IPI
```

    if (x2apic) { x2apic_write(LAPIC_REG_ICR0, ((uint64_t)lapic_id << 32) | 0x4500);

```
    } else {
```

        lapic_write(LAPIC_REG_ICR1, lapic_id << 24);

        lapic_write(LAPIC_REG_ICR0, 0x4500);

```
    }
```
```
    delay(5000);
```

void AttackSystem::update(core::World &world, core::Time &time)

```
    {
```

        auto attackers = world.entities().view<:position>();,>

        attackers.each([&](entt::entity attacker, base::Position &attacker_position, game::Attack &attacker_attack) {

            attacker_attack.cooldown -= time.elapsed();

            int damages = attacker_attack.base_damages + world.getDifficulty();

            auto victims = world.entities().view<:position>();,>

            if (attacker_attack.attacking && attacker_attack.cooldown < 0)

```
            {
```

                victims.each([&](entt::entity victim, base::Position &victim_position, game::Health &victim_health, base::Sprite &victim_sprite) {

                    if (attacker == victim)

```
                    {
```
```
                        return;
```
```
                    }
```

                    if (attacker_position().distance_to(victim_position()) <= attacker_attack.range * core::Tile::SIZE)

```
                    {
```

                        attacker_attack.cooldown = 0.8;

                        victim_sprite.flash = 0.1;

                        victim_health.current -= damages;

                        if (world.entities().has<:player>(victim))

```
                        {
```

                            auto &player = world.entities().get<:player>(victim);

                            auto &camera = world.players()[player.player_index].camera();

                            camera.trauma(0.1);

```
                        }
```
```
                    }
```
```
                });
```
```
            }
```

            attacker_attack.attacking = false;

```
        });
```
```
    }
```

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