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#![allow(dead_code)]
use utils::{Read, Write};
pub trait Controller {
fn read(&self) -> u8;
fn write(&self, data: u8);
fn load(&mut self, reader: &mut Read) -> bool;
fn save(&self, writer: &mut Write) -> bool;
}
pub mod stdctl {
use utils::{Read, Write, load_prefix, save_prefix};
use core::cell::Cell;
use controller::Controller;
pub const A: u8 = 1 << 0;
pub const B: u8 = 1 << 1;
pub const SELECT: u8 = 1 << 2;
pub const START: u8 = 1 << 3;
pub const UP: u8 = 1 << 4;
pub const DOWN: u8 = 1 << 5;
pub const LEFT: u8 = 1 << 6;
pub const RIGHT: u8 = 1 << 7;
pub const NULL: u8 = 0;
#[repr(C)]
pub struct Joystick {
strobe: Cell<bool>,
reg: Cell<u8>,
back_reg: Cell<u8>
}
impl Joystick {
pub fn new() -> Self {
Joystick{reg: Cell::new(0), strobe: Cell::new(false), back_reg: Cell::new(0)}
}
pub fn set(&self, buttons: u8) {
self.reg.set(buttons);
self.back_reg.set(buttons);
}
}
impl Controller for Joystick {
fn read(&self) -> u8 {
let res = self.reg.get() & 1;
if !self.strobe.get() {
self.reg.set(self.reg.get() >> 1);
}
res
}
fn write(&self, data: u8) {
self.strobe.set(data & 1 == 1);
self.reg.set(self.back_reg.get());
}
fn load(&mut self, reader: &mut Read) -> bool {
load_prefix(self, 0, reader)
}
fn save(&self, writer: &mut Write) -> bool {
save_prefix(self, 0, writer)
}
}
}
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