Create MouseConfig from config file

.gitignore

@@ -1,2 +1,4 @@
 /target
 Cargo.lock
+
+src/mouse_config.rs

build.rs

@@ -0,0 +1,109 @@
+enum Variable<'a> {
+    Int(&'a str, i32),
+    String(&'a str, &'a str),
+}
+
+fn contains_string(variables: &[Variable]) -> bool {
+    variables.iter().any(|variable| match variable {
+        Variable::Int(_, _) => false,
+        Variable::String(_, _) => true,
+    })
+}
+
+fn create_config_struct(content: &str, path: &str, struct_name: &str) {
+    let variables: Vec<Variable<'_>> = content
+        .lines()
+        .map(|line| {
+            let mut split = line.split(':');
+
+            let name = split
+                .next()
+                .unwrap()
+                .trim()
+                .trim_start_matches('"')
+                .trim_end_matches('"');
+
+            let value = split.next().unwrap().trim();
+
+            if value.starts_with('"') {
+                let trimmed_string = value.trim_start_matches('"').trim_end_matches('"');
+
+                Variable::String(name, trimmed_string)
+            } else {
+                Variable::Int(
+                    name,
+                    if value.starts_with("0x") {
+                        i32::from_str_radix(value.trim_start_matches("0x"), 16).unwrap()
+                    } else {
+                        str::parse(value).unwrap()
+                    },
+                )
+            }
+        })
+        .collect();
+
+    let needs_lifetime = contains_string(&variables);
+    let mut file_string = String::new();
+
+    file_string += &format!("pub struct {struct_name}");
+
+    if needs_lifetime {
+        file_string += "<'a> ";
+    }
+
+    file_string += "{\n";
+
+    for variable in variables.iter() {
+        match variable {
+            Variable::Int(name, _value) => {
+                file_string += &format!("\tpub {name}: i32,\n");
+            }
+            Variable::String(name, _value) => {
+                file_string += &format!("\tpub {name}: &'a str,\n");
+            }
+        }
+    }
+
+    file_string += "}\n\n";
+
+    file_string += "impl";
+
+    if needs_lifetime {
+        file_string += "<'a> ";
+    }
+
+    file_string += struct_name;
+
+    if needs_lifetime {
+        file_string += "<'a> ";
+    }
+
+    file_string += "{\n";
+    file_string += "\tpub const fn new() -> Self {\n";
+    file_string += "\t\tSelf {\n";
+
+    for variable in variables.iter() {
+        match variable {
+            Variable::Int(name, value) => {
+                file_string += &format!("\t\t\t{name}: {value},\n");
+            }
+            Variable::String(name, value) => {
+                file_string += &format!("\t\t\t{name}: \"{value}\",\n");
+            }
+        }
+    }
+
+    file_string += "\t\t}\n";
+    file_string += "\t}\n";
+    file_string += "}\n";
+
+    std::fs::write(path, file_string).unwrap();
+}
+
+fn main() {
+    create_config_struct(
+        include_str!("mouse.conf"),
+        "src/mouse_config.rs",
+        "MouseConfig",
+    );
+}

mouse.conf

@@ -0,0 +1,5 @@
+vendor_id: 0x046d
+product_id: 0x101b
+manufacturer: "Logitech"
+product: "Performance Plus M705"
+serial_number: "B14D65DA"

src/main.rs

@@ -3,6 +3,7 @@
 #![feature(type_alias_impl_trait)]
 #![feature(never_type)]
 
+mod mouse_config;
 mod mouse_hid;
 
 use embassy_executor::Spawner;
@@ -11,7 +12,7 @@ use embassy_time::{Duration, Timer};
 
 use usbd_hid::descriptor::MouseReport;
 
-use crate::mouse_hid::{MouseConfig, MouseHID};
+use crate::{mouse_config::MouseConfig, mouse_hid::MouseHID};
 
 use {defmt_rtt as _, panic_probe as _};
 
@@ -19,17 +20,7 @@ use {defmt_rtt as _, panic_probe as _};
 async fn main(_spawner: Spawner) {
     let p = embassy_rp::init(Default::default());
 
-    let mut mouse_hid = MouseHID::new(
+    let mut mouse_hid = MouseHID::new(p.USB, MouseConfig::new());
-        p.USB,
-        MouseConfig {
-            vendor_id: 0x046d,
-            product_id: 0x101b,
-            manufacturer: "Logitech",
-            product: "Performance Plus M705",
-            serial_number: "B14D65DA",
-        },
-    )
-    .await;
 
     let usb_fut = MouseHID::run_usb().await;
 

src/mouse_hid.rs

@@ -9,6 +9,8 @@ use embassy_usb::{Builder, Config, UsbDevice};
 
 use usbd_hid::descriptor::{MouseReport, SerializedDescriptor};
 
+use crate::mouse_config::MouseConfig;
+
 static mut DEVICE_DESCRIPTOR_BUFFER: [u8; 256] = [0; 256];
 static mut CONFIG_DESCRIPTOR_BUFFER: [u8; 256] = [0; 256];
 static mut BOS_DESCRIPTOR_BUFFER: [u8; 256] = [0; 256];
@@ -18,26 +20,21 @@ static mut STATE: Option<State<'static>> = None;
 static mut USB: Option<UsbDevice<'static, Driver<'static, USB>>> = None;
 static REQUEST_HANDLER: MyRequestHandler = MyRequestHandler {};
 
-pub struct MouseConfig<'a> {
-    pub vendor_id: u16,
-    pub product_id: u16,
-    pub manufacturer: &'a str,
-    pub product: &'a str,
-    pub serial_number: &'a str,
-}
-
 pub struct MouseHID<'d> {
     writer: HidWriter<'d, Driver<'d, USB>, 5>,
 }
 
 impl MouseHID<'static> {
-    pub async fn new(usb: USB, mouse_config: MouseConfig<'static>) -> MouseHID<'static> {
+    pub fn new(usb: USB, mouse_config: MouseConfig<'static>) -> MouseHID<'static> {
         // Create the driver, from the HAL.
         let irq = interrupt::take!(USBCTRL_IRQ);
         let driver = Driver::new(usb, irq);
 
         // Create embassy-usb Config
-        let mut config = Config::new(mouse_config.vendor_id, mouse_config.product_id);
+        let mut config = Config::new(
+            mouse_config.vendor_id as u16,
+            mouse_config.product_id as u16,
+        );
         config.manufacturer = Some(mouse_config.manufacturer);
         config.product = Some(mouse_config.product);
         config.serial_number = Some(mouse_config.serial_number);