initial (bad) gamepad support

Cargo.lock

@@ -78,6 +78,22 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "core-foundation"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "194a7a9e6de53fa55116934067c844d9d749312f75c6f6d0980e8c252f8c2146"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"
+
 [[package]]
 name = "cty"
 version = "0.2.2"
@@ -129,6 +145,12 @@ dependencies = [
  "instant",
 ]
 
+[[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
 [[package]]
 name = "futures"
 version = "0.3.26"
@@ -223,6 +245,7 @@ name = "gb-emu"
 version = "0.1.0"
 dependencies = [
  "clap",
+ "gilrs",
  "minifb",
  "rand",
  "spin_sleep",
@@ -239,6 +262,39 @@ dependencies = [
  "wasi",
 ]
 
+[[package]]
+name = "gilrs"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d0342acdc7b591d171212e17c9350ca02383b86d5f9af33c6e3598e03a6c57e"
+dependencies = [
+ "fnv",
+ "gilrs-core",
+ "log",
+ "uuid",
+ "vec_map",
+]
+
+[[package]]
+name = "gilrs-core"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6789d356476c3280a4e15365d23f62b4b4f1bcdac81fdd552f65807bce4666dd"
+dependencies = [
+ "core-foundation",
+ "io-kit-sys",
+ "js-sys",
+ "libc",
+ "libudev-sys",
+ "log",
+ "nix 0.25.1",
+ "uuid",
+ "vec_map",
+ "wasm-bindgen",
+ "web-sys",
+ "windows",
+]
+
 [[package]]
 name = "heck"
 version = "0.4.0"
@@ -266,6 +322,16 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "io-kit-sys"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7789f7f3c9686f96164f5109d69152de759e76e284f736bd57661c6df5091919"
+dependencies = [
+ "core-foundation-sys",
+ "mach",
+]
+
 [[package]]
 name = "io-lifetimes"
 version = "1.0.4"
@@ -319,6 +385,16 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "libudev-sys"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c8469b4a23b962c1396b9b451dda50ef5b283e8dd309d69033475fa9b334324"
+dependencies = [
+ "libc",
+ "pkg-config",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.1.4"
@@ -334,6 +410,15 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "mach"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b823e83b2affd8f40a9ee8c29dbc56404c1e34cd2710921f2801e2cf29527afa"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "memchr"
 version = "2.5.0"
@@ -393,6 +478,18 @@ dependencies = [
  "memoffset",
 ]
 
+[[package]]
+name = "nix"
+version = "0.25.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f346ff70e7dbfd675fe90590b92d59ef2de15a8779ae305ebcbfd3f0caf59be4"
+dependencies = [
+ "autocfg",
+ "bitflags",
+ "cfg-if",
+ "libc",
+]
+
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -700,6 +797,18 @@ version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "84a22b9f218b40614adcb3f4ff08b703773ad44fa9423e4e0d346d5db86e4ebc"
 
+[[package]]
+name = "uuid"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1674845326ee10d37ca60470760d4288a6f80f304007d92e5c53bab78c9cfd79"
+
+[[package]]
+name = "vec_map"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+
 [[package]]
 name = "version-compare"
 version = "0.1.1"
@@ -793,7 +902,7 @@ dependencies = [
  "bitflags",
  "downcast-rs",
  "libc",
- "nix",
+ "nix 0.24.3",
  "scoped-tls",
  "wayland-commons",
  "wayland-scanner",
@@ -806,7 +915,7 @@ version = "0.29.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8691f134d584a33a6606d9d717b95c4fa20065605f798a3f350d78dced02a902"
 dependencies = [
- "nix",
+ "nix 0.24.3",
  "once_cell",
  "smallvec",
  "wayland-sys",
@@ -818,7 +927,7 @@ version = "0.29.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6865c6b66f13d6257bef1cd40cbfe8ef2f150fb8ebbdb1e8e873455931377661"
 dependencies = [
- "nix",
+ "nix 0.24.3",
  "wayland-client",
  "xcursor",
 ]
@@ -898,6 +1007,21 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows"
+version = "0.43.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04662ed0e3e5630dfa9b26e4cb823b817f1a9addda855d973a9458c236556244"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.42.0"

Cargo.toml

@@ -10,3 +10,4 @@ clap = {version = "4.1.1", features = ["derive"]}
 spin_sleep = "1.1.1"
 minifb = "0.23"
 rand = "0.8.5"
+gilrs = "0.10.1"

src/main.rs

@@ -4,6 +4,7 @@ mod processor;
 mod util;
 
 use clap::{ArgGroup, Parser};
+use gilrs::Gilrs;
 use minifb::{Window, WindowOptions};
 use processor::{
     memory::{rom::Rom, Memory},
@@ -117,6 +118,7 @@ fn main() {
         window,
         args.tile_window,
         args.run_bootrom,
+        Gilrs::new().unwrap(),
     );
 
     let mut cycle_num = 0;

src/processor/gpu.rs

@@ -151,7 +151,12 @@ impl Cpu {
     }
 
     fn enter_vblank(&mut self) {
-        if self.memory.update_pressed_keys(self.window.get_keys()) {
+        // let gamepad = self.gamepad_handler.gamepads().last();
+        while self.gamepad_handler.next_event().is_some() {}
+        if self
+            .memory
+            .update_pressed_keys(self.window.get_keys(), self.gamepad_handler.gamepads())
+        {
             self.memory.set(0xFF0F, set_bit(self.memory.get(0xFF0F), 4));
         }
         self.gpu.mode = DrawMode::VBlank;

src/processor/memory.rs

@@ -3,6 +3,7 @@ use crate::{
     processor::{clear_bit, get_bit, SplitRegister},
     verbose_println,
 };
+use gilrs::{Button, ConnectedGamepadsIterator, Gamepad, GamepadId};
 use minifb::Key;
 use std::io::{stdout, Write};
 
@@ -280,16 +281,41 @@ impl Memory {
         self.io[addr_l] = (self.io[addr_l] & (!mask)) | (data & mask);
     }
 
-    pub fn update_pressed_keys(&mut self, keys: Vec<Key>) -> bool {
+    pub fn update_pressed_keys(
+        &mut self,
+        keys: Vec<Key>,
+        gamepads: ConnectedGamepadsIterator,
+    ) -> bool {
         let old = self.joypad;
-        self.joypad.down = keys.contains(&Key::Down) || keys.contains(&Key::S);
+        self.joypad = Joypad {
-        self.joypad.up = keys.contains(&Key::Up) || keys.contains(&Key::W);
+            bank_sel: self.joypad.bank_sel,
-        self.joypad.left = keys.contains(&Key::Left) || keys.contains(&Key::A);
+            down: false,
-        self.joypad.right = keys.contains(&Key::Right) || keys.contains(&Key::D);
+            up: false,
-        self.joypad.start = keys.contains(&Key::Equal);
+            left: false,
-        self.joypad.select = keys.contains(&Key::Minus);
+            right: false,
-        self.joypad.a = keys.contains(&Key::Apostrophe);
+            start: false,
-        self.joypad.b = keys.contains(&Key::Semicolon);
+            select: false,
+            b: false,
+            a: false,
+        };
+        for (_, pad) in gamepads {
+            self.joypad.down |= pad.is_pressed(Button::DPadDown);
+            self.joypad.up |= pad.is_pressed(Button::DPadUp);
+            self.joypad.left |= pad.is_pressed(Button::DPadLeft);
+            self.joypad.right |= pad.is_pressed(Button::DPadRight);
+            self.joypad.start |= pad.is_pressed(Button::Start);
+            self.joypad.select |= pad.is_pressed(Button::Select);
+            self.joypad.a |= pad.is_pressed(Button::East);
+            self.joypad.b |= pad.is_pressed(Button::South);
+        }
+        self.joypad.down |= keys.contains(&Key::Down) || keys.contains(&Key::S);
+        self.joypad.up |= keys.contains(&Key::Up) || keys.contains(&Key::W);
+        self.joypad.left |= keys.contains(&Key::Left) || keys.contains(&Key::A);
+        self.joypad.right |= keys.contains(&Key::Right) || keys.contains(&Key::D);
+        self.joypad.start |= keys.contains(&Key::Equal);
+        self.joypad.select |= keys.contains(&Key::Minus);
+        self.joypad.a |= keys.contains(&Key::Apostrophe);
+        self.joypad.b |= keys.contains(&Key::Semicolon);
         self.joypad != old
     }
 

src/processor/mod.rs

@@ -3,6 +3,7 @@ use crate::{
     util::{clear_bit, get_bit},
     verbose_println,
 };
+use gilrs::Gilrs;
 use minifb::Window;
 
 pub mod gpu;
@@ -33,6 +34,7 @@ pub struct Cpu {
     gpu: Gpu,
     halted: bool,
     timers: Timers,
+    gamepad_handler: Gilrs,
 }
 
 // Hz
@@ -46,6 +48,7 @@ impl Cpu {
         window: Window,
         enable_tile_window: bool,
         run_bootrom: bool,
+        gamepad_handler: Gilrs,
     ) -> Self {
         if run_bootrom {
             memory.cpu_ram_init();
@@ -59,6 +62,7 @@ impl Cpu {
             gpu: Gpu::new(enable_tile_window),
             halted: false,
             timers: Timers::init(),
+            gamepad_handler,
         }
     }