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make loader windows-friendly for usb serial

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This commit is contained in:
bunnie 2025-09-13 01:08:31 +08:00
parent 01957c3b65
commit 3bd79d0328
2 changed files with 22 additions and 1 deletions
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2
loader/src/platform/cramium/usb/handlers.rs
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@ -159,7 +159,7 @@ pub fn get_descriptor_request(this: &mut CorigineUsb, value: u16, _index: usize,
match (value >> 8) as u8 {
USB_DT_DEVICE => {
crate::println!("USB_DT_DEVICE");
let mut device_descriptor = DeviceDescriptor::default_composite();
let mut device_descriptor = DeviceDescriptor::composite_with_iad();
device_descriptor.b_max_packet_size0 = 64;
let len = length.min(core::mem::size_of::<DeviceDescriptor>());

21
loader/src/platform/cramium/usb/mod.rs
View file

@ -168,6 +168,7 @@ impl DeviceDescriptor {
}
}
#[allow(dead_code)]
pub fn default_composite() -> Self {
Self {
b_length: core::mem::size_of::<Self>() as u8,
@ -186,6 +187,26 @@ impl DeviceDescriptor {
b_num_configurations: 1,
}
}
// Windows-friendly composite: EF/02/01 indicates IAD-present composite
pub fn composite_with_iad() -> Self {
Self {
b_length: core::mem::size_of::<Self>() as u8,
b_descriptor_type: USB_DT_DEVICE,
b_cd_usb: 0x0200,
b_device_class: 0xEF, // Miscellaneous
b_device_sub_class: 0x02, // Common Class
b_device_protocol: 0x01, // Interface Association Descriptor (IAD)
b_max_packet_size0: 0x40,
id_vendor: VENDOR_ID,
id_product: PRODUCT_ID,
b_cd_device: 0x0101,
i_manufacturer: 0x01,
i_product: 0x02,
i_serial_number: 0x03,
b_num_configurations: 1,
}
}
}
impl AsRef<[u8]> for DeviceDescriptor {
fn as_ref(&self) -> &[u8] {