From 02e45bfc9d678459066ae3ec70a82a1505163821 Mon Sep 17 00:00:00 2001
From: Naxdy <naxdy@naxdy.org>
Date: Sat, 20 Apr 2024 11:02:56 +0200
Subject: [PATCH] feat(hid): add msos descriptor

---
 src/gcc_hid.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/gcc_hid.rs b/src/gcc_hid.rs
index 092d7d8..cefdaef 100644
--- a/src/gcc_hid.rs
+++ b/src/gcc_hid.rs
@@ -17,6 +17,8 @@ use embassy_time::{Duration, Instant, Timer};
 use embassy_usb::{
     class::hid::{HidReaderWriter, ReportId, RequestHandler, State},
     control::OutResponse,
+    msos::{self, windows_version},
+    types::InterfaceNumber,
     Builder, Handler,
 };
 use libm::powf;
@@ -36,6 +38,9 @@ pub static MUTEX_INPUT_CONSISTENCY_MODE: Mutex<
     Option<InputConsistencyMode>,
 > = Mutex::new(None);
 
+// This is a randomly generated GUID to allow clients on Windows to find our device
+const DEVICE_INTERFACE_GUID: &str = "{ecceff35-146c-4ff3-acd9-8f992d09acdd}";
+
 #[rustfmt::skip]
 pub const GCC_REPORT_DESCRIPTOR: &[u8] = &[
     0x05, 0x01,        // Usage Page (Generic Desktop Ctrls)
@@ -334,6 +339,15 @@ pub async fn usb_transfer_task(raw_serial: [u8; 8], driver: Driver<'static, USB>
         &mut control_buf,
     );
 
+    builder.msos_descriptor(windows_version::WIN8_1, 2);
+
+    let msos_writer = builder.msos_writer();
+    msos_writer.device_feature(msos::CompatibleIdFeatureDescriptor::new("WINUSB", ""));
+    msos_writer.device_feature(msos::RegistryPropertyFeatureDescriptor::new(
+        "DeviceInterfaceGUID",
+        msos::PropertyData::Sz(DEVICE_INTERFACE_GUID),
+    ));
+
     builder.handler(&mut device_handler);
 
     let hid_config = embassy_usb::class::hid::Config {