Convert MS OS descriptor builder to a writer API
This brings it inline with the other embassy-usb descriptor APIs and allows it to integrate well with the Builder to allow class constructors to add MS OS descriptors. Also adds a `usb_serial_winusb` example to demonstrate how to use the API.
This commit is contained in:
alexmoon
parent
b9ecdb72bb
commit
9f9230ae7a
@ -13,6 +13,7 @@ target = "thumbv7em-none-eabi"
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[features]
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defmt = ["dep:defmt", "embassy-usb-driver/defmt"]
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usbd-hid = ["dep:usbd-hid", "dep:ssmarshal"]
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msos-descriptor = ["dep:widestring"]
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default = ["usbd-hid"]
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[dependencies]
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@ -24,7 +25,7 @@ embassy-net-driver-channel = { version = "0.1.0", path = "../embassy-net-driver-
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defmt = { version = "0.3", optional = true }
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log = { version = "0.4.14", optional = true }
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heapless = "0.7.10"
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widestring = { version = "1.0.2", default-features = false }
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widestring = { version = "1.0.2", default-features = false, optional = true }
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# for HID
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usbd-hid = { version = "0.6.0", optional = true }
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@ -3,6 +3,8 @@ use heapless::Vec;
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use crate::control::ControlHandler;
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use crate::descriptor::{BosWriter, DescriptorWriter};
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use crate::driver::{Driver, Endpoint, EndpointType};
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#[cfg(feature = "msos-descriptor")]
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use crate::msos::{DeviceLevelDescriptor, FunctionLevelDescriptor, MsOsDescriptorWriter};
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use crate::types::*;
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use crate::{DeviceStateHandler, Interface, UsbDevice, MAX_INTERFACE_COUNT, STRING_INDEX_CUSTOM_START};
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@ -130,7 +132,9 @@ pub struct Builder<'d, D: Driver<'d>> {
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device_descriptor: DescriptorWriter<'d>,
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config_descriptor: DescriptorWriter<'d>,
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bos_descriptor: BosWriter<'d>,
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msos_descriptor: Option<crate::msos::MsOsDescriptorSet<'d>>,
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#[cfg(feature = "msos-descriptor")]
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msos_descriptor: MsOsDescriptorWriter<'d>,
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}
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impl<'d, D: Driver<'d>> Builder<'d, D> {
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@ -145,6 +149,7 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
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device_descriptor_buf: &'d mut [u8],
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config_descriptor_buf: &'d mut [u8],
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bos_descriptor_buf: &'d mut [u8],
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#[cfg(feature = "msos-descriptor")] msos_descriptor_buf: &'d mut [u8],
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control_buf: &'d mut [u8],
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handler: Option<&'d dyn DeviceStateHandler>,
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) -> Self {
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@ -183,12 +188,17 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
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device_descriptor,
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config_descriptor,
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bos_descriptor,
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msos_descriptor: None,
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#[cfg(feature = "msos-descriptor")]
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msos_descriptor: MsOsDescriptorWriter::new(msos_descriptor_buf),
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}
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}
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/// Creates the [`UsbDevice`] instance with the configuration in this builder.
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pub fn build(mut self) -> UsbDevice<'d, D> {
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#[cfg(feature = "msos-descriptor")]
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let msos_descriptor = self.msos_descriptor.build(&mut self.bos_descriptor);
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self.config_descriptor.end_configuration();
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self.bos_descriptor.end_bos();
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@ -201,7 +211,8 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
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self.bos_descriptor.writer.into_buf(),
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self.interfaces,
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self.control_buf,
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self.msos_descriptor,
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#[cfg(feature = "msos-descriptor")]
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msos_descriptor,
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)
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}
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@ -218,14 +229,10 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
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///
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/// If it's not set, no IAD descriptor is added.
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pub fn function(&mut self, class: u8, subclass: u8, protocol: u8) -> FunctionBuilder<'_, 'd, D> {
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let first_interface = InterfaceNumber::new(self.interfaces.len() as u8);
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let iface_count_index = if self.config.composite_with_iads {
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self.config_descriptor.iad(
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InterfaceNumber::new(self.interfaces.len() as _),
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0,
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class,
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subclass,
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protocol,
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);
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self.config_descriptor
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.iad(first_interface, 0, class, subclass, protocol);
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Some(self.config_descriptor.position() - 5)
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} else {
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@ -235,19 +242,31 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
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FunctionBuilder {
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builder: self,
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iface_count_index,
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#[cfg(feature = "msos-descriptor")]
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first_interface,
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}
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}
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#[cfg(feature = "msos-descriptor")]
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/// Add an MS OS 2.0 Descriptor Set.
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///
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/// Panics if called more than once.
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pub fn msos_descriptor(&mut self, msos_descriptor: crate::msos::MsOsDescriptorSet<'d>) {
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if self.msos_descriptor.is_some() {
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panic!("msos_descriptor already set");
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}
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self.msos_descriptor
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.insert(msos_descriptor)
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.write_bos_capability(&mut self.bos_descriptor);
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pub fn msos_descriptor(&mut self, windows_version: u32, vendor_code: u8) {
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self.msos_descriptor.header(windows_version, vendor_code);
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}
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#[cfg(feature = "msos-descriptor")]
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/// Add an MS OS 2.0 Device Level Feature Descriptor.
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pub fn msos_feature<T: DeviceLevelDescriptor>(&mut self, desc: T) {
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self.msos_descriptor.device_feature(desc);
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}
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#[cfg(feature = "msos-descriptor")]
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/// Gets the underlying [`MsOsDescriptorWriter`] to allow adding subsets and features for classes that
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/// do not add their own.
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pub fn msos_writer(&mut self) -> &mut MsOsDescriptorWriter<'d> {
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&mut self.msos_descriptor
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}
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}
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@ -259,6 +278,16 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
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pub struct FunctionBuilder<'a, 'd, D: Driver<'d>> {
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builder: &'a mut Builder<'d, D>,
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iface_count_index: Option<usize>,
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#[cfg(feature = "msos-descriptor")]
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first_interface: InterfaceNumber,
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}
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impl<'a, 'd, D: Driver<'d>> Drop for FunctionBuilder<'a, 'd, D> {
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fn drop(&mut self) {
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#[cfg(feature = "msos-descriptor")]
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self.builder.msos_descriptor.end_function();
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}
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}
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impl<'a, 'd, D: Driver<'d>> FunctionBuilder<'a, 'd, D> {
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@ -288,6 +317,21 @@ impl<'a, 'd, D: Driver<'d>> FunctionBuilder<'a, 'd, D> {
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next_alt_setting_number: 0,
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}
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}
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#[cfg(feature = "msos-descriptor")]
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/// Add an MS OS 2.0 Function Level Feature Descriptor.
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pub fn msos_feature<T: FunctionLevelDescriptor>(&mut self, desc: T) {
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if !self.builder.msos_descriptor.is_in_config_subset() {
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self.builder.msos_descriptor.configuration(0);
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}
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if !self.builder.msos_descriptor.is_in_function_subset() {
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self.builder.msos_descriptor.function(self.first_interface.0);
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}
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#[cfg(feature = "msos-descriptor")]
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self.builder.msos_descriptor.function_feature(desc);
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}
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}
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/// Interface builder.
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@ -136,8 +136,8 @@ struct Inner<'d, D: Driver<'d>> {
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set_address_pending: bool,
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interfaces: Vec<Interface<'d>, MAX_INTERFACE_COUNT>,
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msos_descriptor: Option<crate::msos::MsOsDescriptorSet<'d>>,
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#[cfg(feature = "msos-descriptor")]
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msos_descriptor: crate::msos::MsOsDescriptorSet<'d>,
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}
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impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
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@ -150,7 +150,7 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
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bos_descriptor: &'d [u8],
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interfaces: Vec<Interface<'d>, MAX_INTERFACE_COUNT>,
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control_buf: &'d mut [u8],
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msos_descriptor: Option<crate::msos::MsOsDescriptorSet<'d>>,
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#[cfg(feature = "msos-descriptor")] msos_descriptor: crate::msos::MsOsDescriptorSet<'d>,
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) -> UsbDevice<'d, D> {
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// Start the USB bus.
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// This prevent further allocation by consuming the driver.
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@ -174,6 +174,7 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
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address: 0,
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set_address_pending: false,
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interfaces,
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#[cfg(feature = "msos-descriptor")]
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msos_descriptor,
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},
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}
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@ -608,11 +609,12 @@ impl<'d, D: Driver<'d>> Inner<'d, D> {
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None => InResponse::Rejected,
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}
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}
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#[cfg(feature = "msos-descriptor")]
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(RequestType::Vendor, Recipient::Device) => {
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if let Some(msos) = &self.msos_descriptor {
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if req.request == msos.vendor_code() && req.index == 7 {
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if !self.msos_descriptor.is_empty() {
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if req.request == self.msos_descriptor.vendor_code() && req.index == 7 {
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// Index 7 retrieves the MS OS Descriptor Set
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InResponse::Accepted(msos.descriptor())
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InResponse::Accepted(self.msos_descriptor.descriptor())
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} else {
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InResponse::Rejected
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}
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@ -1,3 +1,5 @@
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#![cfg(feature = "msos-descriptor")]
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//! Microsoft OS Descriptors
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//!
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//! <https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-os-2-0-descriptors-specification>
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@ -5,10 +7,9 @@
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use core::mem::size_of;
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use core::ops::Range;
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pub use widestring::{u16cstr, U16CStr};
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pub use widestring::{u16cstr, u16str, U16CStr, U16Str};
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use crate::descriptor::{capability_type, BosWriter};
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use crate::types::InterfaceNumber;
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use super::{capability_type, BosWriter};
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fn write_u16<T: Into<u16>>(buf: &mut [u8], range: Range<usize>, data: T) {
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(&mut buf[range]).copy_from_slice(data.into().to_le_bytes().as_slice())
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@ -17,13 +18,12 @@ fn write_u16<T: Into<u16>>(buf: &mut [u8], range: Range<usize>, data: T) {
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/// A serialized Microsoft OS 2.0 Descriptor set.
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///
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/// Create with [`DeviceDescriptorSetBuilder`].
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pub struct MsOsDescriptorSet<'a> {
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descriptor: &'a [u8],
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windows_version: u32,
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pub struct MsOsDescriptorSet<'d> {
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descriptor: &'d [u8],
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vendor_code: u8,
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}
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impl<'a> MsOsDescriptorSet<'a> {
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impl<'d> MsOsDescriptorSet<'d> {
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pub fn descriptor(&self) -> &[u8] {
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self.descriptor
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}
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@ -32,9 +32,150 @@ impl<'a> MsOsDescriptorSet<'a> {
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self.vendor_code
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}
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pub fn write_bos_capability(&self, bos: &mut BosWriter) {
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let windows_version = self.windows_version.to_le_bytes();
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let len = self.descriptor.len().to_le_bytes();
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pub fn is_empty(&self) -> bool {
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self.descriptor.is_empty()
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}
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}
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/// Writes a Microsoft OS 2.0 Descriptor set into a buffer.
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pub struct MsOsDescriptorWriter<'d> {
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pub buf: &'d mut [u8],
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position: usize,
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config_mark: Option<usize>,
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function_mark: Option<usize>,
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vendor_code: u8,
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}
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impl<'d> MsOsDescriptorWriter<'d> {
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pub(crate) fn new(buf: &'d mut [u8]) -> Self {
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MsOsDescriptorWriter {
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buf,
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position: 0,
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config_mark: None,
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function_mark: None,
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vendor_code: 0,
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}
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}
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pub(crate) fn build(mut self, bos: &mut BosWriter) -> MsOsDescriptorSet<'d> {
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self.end();
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if self.is_empty() {
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MsOsDescriptorSet {
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descriptor: &[],
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vendor_code: 0,
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}
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} else {
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self.write_bos(bos);
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MsOsDescriptorSet {
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descriptor: &self.buf[..self.position],
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vendor_code: self.vendor_code,
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}
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}
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}
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pub fn is_empty(&self) -> bool {
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self.position == 0
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}
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pub fn is_in_config_subset(&self) -> bool {
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self.config_mark.is_some()
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}
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pub fn is_in_function_subset(&self) -> bool {
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self.function_mark.is_some()
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}
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/// Write the MS OS descriptor set header.
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///
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/// - `windows_version` is an NTDDI version constant that describes a windows version. See the [`windows_version`]
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/// module.
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/// - `vendor_code` is the vendor request code used to read the MS OS descriptor set.
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pub fn header(&mut self, windows_version: u32, vendor_code: u8) {
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assert!(self.is_empty(), "You can only call MsOsDescriptorWriter::header once");
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self.write(DescriptorSetHeader::new(windows_version));
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self.vendor_code = vendor_code;
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}
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/// Add a device level feature descriptor.
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///
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/// Note that some feature descriptors may only be used at the device level in non-composite devices.
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/// Those features must be written before the first call to [`Self::configuration`].
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pub fn device_feature<T: DeviceLevelDescriptor>(&mut self, desc: T) {
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assert!(
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!self.is_empty(),
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"device features may only be added after the header is written"
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);
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assert!(
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self.config_mark.is_none(),
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"device features must be added before the first configuration subset"
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);
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self.write(desc);
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}
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/// Add a configuration subset.
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pub fn configuration(&mut self, config: u8) {
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assert!(
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!self.is_empty(),
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"MsOsDescriptorWriter: configuration must be called after header"
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);
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Self::end_subset::<ConfigurationSubsetHeader>(self.buf, self.position, &mut self.config_mark);
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self.config_mark = Some(self.position);
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self.write(ConfigurationSubsetHeader::new(config));
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}
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/// Add a function subset.
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pub fn function(&mut self, first_interface: u8) {
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assert!(
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self.config_mark.is_some(),
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"MsOsDescriptorWriter: function subset requires a configuration subset"
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);
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self.end_function();
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self.function_mark = Some(self.position);
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self.write(FunctionSubsetHeader::new(first_interface));
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}
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/// Add a function level feature descriptor.
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///
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/// Note that some features may only be used at the function level. Those features must be written after a call
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/// to [`Self::function`].
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pub fn function_feature<T: FunctionLevelDescriptor>(&mut self, desc: T) {
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assert!(
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self.function_mark.is_some(),
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"function features may only be added to a function subset"
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);
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self.write(desc);
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}
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pub fn end_function(&mut self) {
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Self::end_subset::<FunctionSubsetHeader>(self.buf, self.position, &mut self.function_mark);
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}
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fn write<T: Descriptor>(&mut self, desc: T) {
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desc.write_to(&mut self.buf[self.position..]);
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self.position += desc.size();
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}
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fn end_subset<T: DescriptorSet>(buf: &mut [u8], position: usize, mark: &mut Option<usize>) {
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if let Some(mark) = mark.take() {
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let len = position - mark;
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let p = mark + T::LENGTH_OFFSET;
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buf[p..(p + 2)].copy_from_slice(&(len as u16).to_le_bytes());
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}
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}
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fn end(&mut self) {
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if self.position > 0 {
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Self::end_subset::<FunctionSubsetHeader>(self.buf, self.position, &mut self.function_mark);
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Self::end_subset::<ConfigurationSubsetHeader>(self.buf, self.position, &mut self.config_mark);
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Self::end_subset::<DescriptorSetHeader>(self.buf, self.position, &mut Some(0));
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}
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}
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fn write_bos(&mut self, bos: &mut BosWriter) {
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let windows_version = &self.buf[4..8];
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let len = (self.position as u16).to_le_bytes();
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bos.capability(
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capability_type::PLATFORM,
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&[
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@ -67,30 +208,7 @@ impl<'a> MsOsDescriptorSet<'a> {
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self.vendor_code,
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0x0, // Device does not support alternate enumeration
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],
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)
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}
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}
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/// A helper struct to implement the different descriptor set builders.
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struct DescriptorSetBuilder<'a> {
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used: usize,
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buf: &'a mut [u8],
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}
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impl<'a> DescriptorSetBuilder<'a> {
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pub fn descriptor<T>(&mut self, desc: T)
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where
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T: Descriptor + 'a,
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{
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let size = desc.size();
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let start = self.used;
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let end = start + size;
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desc.write_to(&mut self.buf[start..end]);
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self.used += size;
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}
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pub fn remaining(&mut self) -> &mut [u8] {
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&mut self.buf[self.used..]
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);
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}
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}
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@ -120,182 +238,27 @@ pub mod windows_version {
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pub const WIN10: u32 = 0x0A000000;
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}
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|
||||
/// Helps build a Microsoft OS 2.0 Descriptor set.
|
||||
///
|
||||
/// # Example
|
||||
/// ```rust
|
||||
/// # use embassy_usb::types::InterfaceNumber;
|
||||
/// # use embassy_usb::msos::*;
|
||||
/// # let cdc_interface = unsafe { core::mem::transmute::<u8, InterfaceNumber>(0) };
|
||||
/// # let dfu_interface = unsafe { core::mem::transmute::<u8, InterfaceNumber>(1) };
|
||||
/// let mut buf = [0u8; 256];
|
||||
/// let mut builder = DeviceDescriptorSetBuilder::new(&mut buf[..], windows_version::WIN8_1);
|
||||
/// builder.feature(MinimumRecoveryTimeDescriptor::new(5, 10));
|
||||
/// builder.feature(ModelIdDescriptor::new(0xdeadbeef1234u128));
|
||||
/// builder.configuration(1, |conf| {
|
||||
/// conf.function(cdc_interface, |func| {
|
||||
/// func.winusb_device();
|
||||
/// func.feature(VendorRevisionDescriptor::new(1));
|
||||
/// });
|
||||
/// conf.function(dfu_interface, |func| {
|
||||
/// func.winusb_device();
|
||||
/// func.feature(VendorRevisionDescriptor::new(1));
|
||||
/// });
|
||||
/// });
|
||||
/// ```
|
||||
pub struct DeviceDescriptorSetBuilder<'a> {
|
||||
builder: DescriptorSetBuilder<'a>,
|
||||
windows_version: u32,
|
||||
vendor_code: u8,
|
||||
}
|
||||
mod sealed {
|
||||
use core::mem::size_of;
|
||||
|
||||
impl<'a> DeviceDescriptorSetBuilder<'a> {
|
||||
/// Create a device descriptor set builder.
|
||||
///
|
||||
/// - `windows_version` is an NTDDI version constant that describes a windows version. See the [`windows_version`]
|
||||
/// module.
|
||||
/// - `vendor_code` is the vendor request code used to read the MS OS descriptor set.
|
||||
pub fn new<'b: 'a>(buf: &'b mut [u8], windows_version: u32, vendor_code: u8) -> Self {
|
||||
let mut builder = DescriptorSetBuilder { used: 0, buf };
|
||||
builder.descriptor(DescriptorSetHeader {
|
||||
wLength: (size_of::<DescriptorSetHeader>() as u16).to_le(),
|
||||
wDescriptorType: (DescriptorSetHeader::TYPE as u16).to_le(),
|
||||
dwWindowsVersion: windows_version.to_le(),
|
||||
wTotalLength: 0,
|
||||
});
|
||||
Self {
|
||||
builder,
|
||||
windows_version,
|
||||
vendor_code,
|
||||
/// A trait for descriptors
|
||||
pub trait Descriptor: Sized {
|
||||
const TYPE: super::DescriptorType;
|
||||
|
||||
/// The size of the descriptor's header.
|
||||
fn size(&self) -> usize {
|
||||
size_of::<Self>()
|
||||
}
|
||||
|
||||
fn write_to(&self, buf: &mut [u8]);
|
||||
}
|
||||
|
||||
/// Add a device-level feature descriptor.
|
||||
///
|
||||
/// Note that some feature descriptors may only be used at the device level in non-composite devices.
|
||||
pub fn feature<T>(&mut self, desc: T)
|
||||
where
|
||||
T: Descriptor + DeviceLevelDescriptor + 'a,
|
||||
{
|
||||
self.builder.descriptor(desc)
|
||||
}
|
||||
|
||||
/// Add a configuration subset.
|
||||
pub fn configuration(&mut self, configuration: u8, build_conf: impl FnOnce(&mut ConfigurationSubsetBuilder<'_>)) {
|
||||
let mut cb = ConfigurationSubsetBuilder::new(self.builder.remaining(), configuration);
|
||||
build_conf(&mut cb);
|
||||
self.builder.used += cb.finalize();
|
||||
}
|
||||
|
||||
/// Finishes writing the data.
|
||||
pub fn finalize(self) -> MsOsDescriptorSet<'a> {
|
||||
let used = self.builder.used;
|
||||
let buf = self.builder.buf;
|
||||
// Update length in header with final length
|
||||
let total_len = &mut buf[8..10];
|
||||
total_len.copy_from_slice((used as u16).to_le_bytes().as_slice());
|
||||
|
||||
MsOsDescriptorSet {
|
||||
descriptor: &buf[..used],
|
||||
windows_version: self.windows_version,
|
||||
vendor_code: self.vendor_code,
|
||||
}
|
||||
pub trait DescriptorSet: Descriptor {
|
||||
const LENGTH_OFFSET: usize;
|
||||
}
|
||||
}
|
||||
|
||||
pub struct ConfigurationSubsetBuilder<'a> {
|
||||
builder: DescriptorSetBuilder<'a>,
|
||||
}
|
||||
|
||||
impl<'a> ConfigurationSubsetBuilder<'a> {
|
||||
pub fn new<'b: 'a>(buf: &'b mut [u8], configuration: u8) -> Self {
|
||||
let mut builder = DescriptorSetBuilder { used: 0, buf };
|
||||
builder.descriptor(ConfigurationSubsetHeader {
|
||||
wLength: (size_of::<ConfigurationSubsetHeader>() as u16).to_le(),
|
||||
wDescriptorType: (ConfigurationSubsetHeader::TYPE as u16).to_le(),
|
||||
bConfigurationValue: configuration,
|
||||
bReserved: 0,
|
||||
wTotalLength: 0,
|
||||
});
|
||||
Self { builder }
|
||||
}
|
||||
|
||||
/// Add a function subset.
|
||||
pub fn function(&mut self, interface: InterfaceNumber, build_func: impl FnOnce(&mut FunctionSubsetBuilder<'_>)) {
|
||||
let mut fb = FunctionSubsetBuilder::new(self.builder.remaining(), interface);
|
||||
build_func(&mut fb);
|
||||
self.builder.used += fb.finalize();
|
||||
}
|
||||
|
||||
/// Finishes writing the data. Returns the total number of bytes used by the descriptor set.
|
||||
pub fn finalize(self) -> usize {
|
||||
let used = self.builder.used;
|
||||
let buf = self.builder.buf;
|
||||
// Update length in header with final length
|
||||
let total_len = &mut buf[6..8];
|
||||
total_len.copy_from_slice((used as u16).to_le_bytes().as_slice());
|
||||
used
|
||||
}
|
||||
}
|
||||
|
||||
pub struct FunctionSubsetBuilder<'a> {
|
||||
builder: DescriptorSetBuilder<'a>,
|
||||
}
|
||||
|
||||
impl<'a> FunctionSubsetBuilder<'a> {
|
||||
pub fn new<'b: 'a>(buf: &'b mut [u8], interface: InterfaceNumber) -> Self {
|
||||
let mut builder = DescriptorSetBuilder { used: 0, buf };
|
||||
builder.descriptor(FunctionSubsetHeader {
|
||||
wLength: (size_of::<FunctionSubsetHeader>() as u16).to_le(),
|
||||
wDescriptorType: (FunctionSubsetHeader::TYPE as u16).to_le(),
|
||||
bFirstInterface: interface.0,
|
||||
bReserved: 0,
|
||||
wSubsetLength: 0,
|
||||
});
|
||||
Self { builder }
|
||||
}
|
||||
|
||||
/// Add a function-level descriptor.
|
||||
///
|
||||
/// Note that many descriptors can only be used at function-level in a composite device.
|
||||
pub fn feature<T>(&mut self, desc: T)
|
||||
where
|
||||
T: Descriptor + FunctionLevelDescriptor + 'a,
|
||||
{
|
||||
self.builder.descriptor(desc)
|
||||
}
|
||||
|
||||
/// Adds the feature descriptors to configure this function to use the WinUSB driver.
|
||||
///
|
||||
/// Adds a compatible id descriptor "WINUSB" and a registry descriptor that sets the DeviceInterfaceGUID to the
|
||||
/// USB_DEVICE GUID.
|
||||
pub fn winusb_device(&mut self) {
|
||||
self.feature(CompatibleIdFeatureDescriptor::new_winusb());
|
||||
self.feature(RegistryPropertyFeatureDescriptor::new_usb_deviceinterfaceguid());
|
||||
}
|
||||
|
||||
/// Finishes writing the data. Returns the total number of bytes used by the descriptor set.
|
||||
pub fn finalize(self) -> usize {
|
||||
let used = self.builder.used;
|
||||
let buf = self.builder.buf;
|
||||
// Update length in header with final length
|
||||
let total_len = &mut buf[6..8];
|
||||
total_len.copy_from_slice((used as u16).to_le_bytes().as_slice());
|
||||
used
|
||||
}
|
||||
}
|
||||
|
||||
/// A trait for descriptors
|
||||
pub trait Descriptor: Sized {
|
||||
const TYPE: DescriptorType;
|
||||
|
||||
/// The size of the descriptor's header.
|
||||
fn size(&self) -> usize {
|
||||
size_of::<Self>()
|
||||
}
|
||||
|
||||
fn write_to(&self, buf: &mut [u8]);
|
||||
}
|
||||
use sealed::*;
|
||||
|
||||
/// Copies the data of `t` into `buf`.
|
||||
///
|
||||
@ -303,7 +266,7 @@ pub trait Descriptor: Sized {
|
||||
/// The type `T` must be able to be safely cast to `&[u8]`. (e.g. it is a `#[repr(packed)]` struct)
|
||||
unsafe fn transmute_write_to<T: Sized>(t: &T, buf: &mut [u8]) {
|
||||
let bytes = core::slice::from_raw_parts((t as *const T) as *const u8, size_of::<T>());
|
||||
assert!(buf.len() >= bytes.len());
|
||||
assert!(buf.len() >= bytes.len(), "MSOS descriptor buffer full");
|
||||
(&mut buf[..bytes.len()]).copy_from_slice(bytes);
|
||||
}
|
||||
|
||||
@ -354,6 +317,17 @@ pub struct DescriptorSetHeader {
|
||||
wTotalLength: u16,
|
||||
}
|
||||
|
||||
impl DescriptorSetHeader {
|
||||
pub fn new(windows_version: u32) -> Self {
|
||||
DescriptorSetHeader {
|
||||
wLength: (size_of::<Self>() as u16).to_le(),
|
||||
wDescriptorType: (Self::TYPE as u16).to_le(),
|
||||
dwWindowsVersion: windows_version.to_le(),
|
||||
wTotalLength: 0,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Descriptor for DescriptorSetHeader {
|
||||
const TYPE: DescriptorType = DescriptorType::SetHeaderDescriptor;
|
||||
fn write_to(&self, buf: &mut [u8]) {
|
||||
@ -361,6 +335,10 @@ impl Descriptor for DescriptorSetHeader {
|
||||
}
|
||||
}
|
||||
|
||||
impl DescriptorSet for DescriptorSetHeader {
|
||||
const LENGTH_OFFSET: usize = 8;
|
||||
}
|
||||
|
||||
/// Table 11. Configuration subset header.
|
||||
#[allow(non_snake_case)]
|
||||
#[repr(C, packed(1))]
|
||||
@ -372,6 +350,18 @@ pub struct ConfigurationSubsetHeader {
|
||||
wTotalLength: u16,
|
||||
}
|
||||
|
||||
impl ConfigurationSubsetHeader {
|
||||
pub fn new(config: u8) -> Self {
|
||||
ConfigurationSubsetHeader {
|
||||
wLength: (size_of::<Self>() as u16).to_le(),
|
||||
wDescriptorType: (Self::TYPE as u16).to_le(),
|
||||
bConfigurationValue: config,
|
||||
bReserved: 0,
|
||||
wTotalLength: 0,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Descriptor for ConfigurationSubsetHeader {
|
||||
const TYPE: DescriptorType = DescriptorType::SubsetHeaderConfiguration;
|
||||
fn write_to(&self, buf: &mut [u8]) {
|
||||
@ -379,6 +369,10 @@ impl Descriptor for ConfigurationSubsetHeader {
|
||||
}
|
||||
}
|
||||
|
||||
impl DescriptorSet for ConfigurationSubsetHeader {
|
||||
const LENGTH_OFFSET: usize = 6;
|
||||
}
|
||||
|
||||
/// Table 12. Function subset header.
|
||||
#[allow(non_snake_case)]
|
||||
#[repr(C, packed(1))]
|
||||
@ -390,6 +384,18 @@ pub struct FunctionSubsetHeader {
|
||||
wSubsetLength: u16,
|
||||
}
|
||||
|
||||
impl FunctionSubsetHeader {
|
||||
pub fn new(first_interface: u8) -> Self {
|
||||
FunctionSubsetHeader {
|
||||
wLength: (size_of::<Self>() as u16).to_le(),
|
||||
wDescriptorType: (Self::TYPE as u16).to_le(),
|
||||
bFirstInterface: first_interface,
|
||||
bReserved: 0,
|
||||
wSubsetLength: 0,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Descriptor for FunctionSubsetHeader {
|
||||
const TYPE: DescriptorType = DescriptorType::SubsetHeaderFunction;
|
||||
fn write_to(&self, buf: &mut [u8]) {
|
||||
@ -397,16 +403,17 @@ impl Descriptor for FunctionSubsetHeader {
|
||||
}
|
||||
}
|
||||
|
||||
impl DescriptorSet for FunctionSubsetHeader {
|
||||
const LENGTH_OFFSET: usize = 6;
|
||||
}
|
||||
|
||||
// Feature Descriptors
|
||||
|
||||
/// A marker trait for feature descriptors that are valid at the device level.
|
||||
pub trait DeviceLevelDescriptor {}
|
||||
pub trait DeviceLevelDescriptor: Descriptor {}
|
||||
|
||||
/// A marker trait for feature descriptors that are valid at the function level.
|
||||
pub trait FunctionLevelDescriptor {
|
||||
/// `true` when the feature descriptor may only be used at the function level in composite devices.
|
||||
const COMPOSITE_ONLY: bool = false;
|
||||
}
|
||||
pub trait FunctionLevelDescriptor: Descriptor {}
|
||||
|
||||
/// Table 13. Microsoft OS 2.0 compatible ID descriptor.
|
||||
#[allow(non_snake_case)]
|
||||
@ -419,9 +426,7 @@ pub struct CompatibleIdFeatureDescriptor {
|
||||
}
|
||||
|
||||
impl DeviceLevelDescriptor for CompatibleIdFeatureDescriptor {}
|
||||
impl FunctionLevelDescriptor for CompatibleIdFeatureDescriptor {
|
||||
const COMPOSITE_ONLY: bool = true;
|
||||
}
|
||||
impl FunctionLevelDescriptor for CompatibleIdFeatureDescriptor {}
|
||||
|
||||
impl Descriptor for CompatibleIdFeatureDescriptor {
|
||||
const TYPE: DescriptorType = DescriptorType::FeatureCompatibleId;
|
||||
@ -462,16 +467,12 @@ pub struct RegistryPropertyFeatureDescriptor<'a> {
|
||||
wLength: u16,
|
||||
wDescriptorType: u16,
|
||||
wPropertyDataType: u16,
|
||||
wPropertyNameLength: u16,
|
||||
PropertyName: &'a [u8],
|
||||
wPropertyDataLength: u16,
|
||||
PropertyData: &'a [u8],
|
||||
}
|
||||
|
||||
impl<'a> DeviceLevelDescriptor for RegistryPropertyFeatureDescriptor<'a> {}
|
||||
impl<'a> FunctionLevelDescriptor for RegistryPropertyFeatureDescriptor<'a> {
|
||||
const COMPOSITE_ONLY: bool = true;
|
||||
}
|
||||
impl<'a> FunctionLevelDescriptor for RegistryPropertyFeatureDescriptor<'a> {}
|
||||
|
||||
impl<'a> Descriptor for RegistryPropertyFeatureDescriptor<'a> {
|
||||
const TYPE: DescriptorType = DescriptorType::FeatureRegProperty;
|
||||
@ -479,45 +480,22 @@ impl<'a> Descriptor for RegistryPropertyFeatureDescriptor<'a> {
|
||||
10 + self.PropertyName.len() + self.PropertyData.len()
|
||||
}
|
||||
fn write_to(&self, buf: &mut [u8]) {
|
||||
assert!(buf.len() >= self.size());
|
||||
assert!(self.wPropertyNameLength as usize == self.PropertyName.len());
|
||||
assert!(self.wPropertyDataLength as usize == self.PropertyData.len());
|
||||
assert!(buf.len() >= self.size(), "MSOS descriptor buffer full");
|
||||
write_u16(buf, 0..2, self.wLength);
|
||||
write_u16(buf, 2..4, self.wDescriptorType);
|
||||
write_u16(buf, 4..6, self.wPropertyDataType);
|
||||
write_u16(buf, 6..8, self.wPropertyNameLength);
|
||||
write_u16(buf, 6..8, (self.PropertyName.len() as u16).to_le());
|
||||
let pne = 8 + self.PropertyName.len();
|
||||
(&mut buf[8..pne]).copy_from_slice(self.PropertyName);
|
||||
let pds = pne + 2;
|
||||
let pde = pds + self.PropertyData.len();
|
||||
write_u16(buf, pne..pds, self.wPropertyDataLength);
|
||||
write_u16(buf, pne..pds, (self.PropertyData.len() as u16).to_le());
|
||||
(&mut buf[pds..pde]).copy_from_slice(self.PropertyData);
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a> RegistryPropertyFeatureDescriptor<'a> {
|
||||
/// A registry property.
|
||||
///
|
||||
/// `name` should be a NUL-terminated 16-bit Unicode string.
|
||||
pub fn new_raw<'n: 'a, 'd: 'a>(name: &'a [u8], data: &'d [u8], data_type: PropertyDataType) -> Self {
|
||||
Self {
|
||||
wLength: ((10 + name.len() + data.len()) as u16).to_le(),
|
||||
wDescriptorType: (Self::TYPE as u16).to_le(),
|
||||
wPropertyDataType: (data_type as u16).to_le(),
|
||||
wPropertyNameLength: (name.len() as u16).to_le(),
|
||||
PropertyName: name,
|
||||
wPropertyDataLength: (data.len() as u16).to_le(),
|
||||
PropertyData: data,
|
||||
}
|
||||
}
|
||||
|
||||
fn u16str_bytes(s: &U16CStr) -> &[u8] {
|
||||
unsafe { core::slice::from_raw_parts(s.as_ptr() as *const u8, (s.len() + 1) * 2) }
|
||||
}
|
||||
|
||||
/// A registry property that sets the DeviceInterfaceGUIDs to the device interface class for USB devices which are
|
||||
/// attached to a USB hub.
|
||||
pub fn new_usb_deviceinterfaceguid() -> Self {
|
||||
pub const DEVICE_INTERFACE_GUIDS_NAME: &U16CStr = {
|
||||
// Can't use defmt::panic in constant expressions (inside u16cstr!)
|
||||
macro_rules! panic {
|
||||
($($x:tt)*) => {
|
||||
@ -527,10 +505,25 @@ impl<'a> RegistryPropertyFeatureDescriptor<'a> {
|
||||
};
|
||||
}
|
||||
|
||||
Self::new_multi_string(
|
||||
u16cstr!("DeviceInterfaceGUIDs"),
|
||||
u16cstr!("{A5DCBF10-6530-11D2-901F-00C04FB951ED}").as_slice_with_nul(),
|
||||
)
|
||||
u16cstr!("DeviceInterfaceGUIDs")
|
||||
};
|
||||
|
||||
/// A registry property.
|
||||
///
|
||||
/// `name` should be a NUL-terminated 16-bit Unicode string.
|
||||
pub fn new_raw<'n: 'a, 'd: 'a>(name: &'a [u8], data: &'d [u8], data_type: PropertyDataType) -> Self {
|
||||
assert!(name.len() < usize::from(u16::MAX) && data.len() < usize::from(u16::MAX));
|
||||
Self {
|
||||
wLength: ((10 + name.len() + data.len()) as u16).to_le(),
|
||||
wDescriptorType: (Self::TYPE as u16).to_le(),
|
||||
wPropertyDataType: (data_type as u16).to_le(),
|
||||
PropertyName: name,
|
||||
PropertyData: data,
|
||||
}
|
||||
}
|
||||
|
||||
fn u16str_bytes(s: &U16CStr) -> &[u8] {
|
||||
unsafe { core::slice::from_raw_parts(s.as_ptr() as *const u8, (s.len() + 1) * 2) }
|
||||
}
|
||||
|
||||
/// A registry property containing a NUL-terminated 16-bit Unicode string.
|
||||
@ -558,6 +551,10 @@ impl<'a> RegistryPropertyFeatureDescriptor<'a> {
|
||||
|
||||
/// A registry property containing multiple NUL-terminated 16-bit Unicode strings.
|
||||
pub fn new_multi_string<'n: 'a, 'd: 'a>(name: &'n U16CStr, data: &'d [u16]) -> Self {
|
||||
assert!(
|
||||
data.len() >= 2 && data[data.len() - 1] == 0 && data[data.len() - 2] == 0,
|
||||
"multi-strings must end in double nul terminators"
|
||||
);
|
||||
Self::new_raw(
|
||||
Self::u16str_bytes(name),
|
||||
unsafe { core::slice::from_raw_parts(data.as_ptr() as *const u8, data.len() * 2) },
|
||||
|
||||
@ -6,6 +6,7 @@ license = "MIT OR Apache-2.0"
|
||||
|
||||
[features]
|
||||
default = ["nightly"]
|
||||
msos-descriptor = ["embassy-usb/msos-descriptor"]
|
||||
nightly = ["embassy-executor/nightly", "embassy-nrf/nightly", "embassy-net/nightly", "embassy-nrf/unstable-traits", "embassy-usb", "embedded-io/async", "embassy-net",
|
||||
"embassy-lora", "lorawan-device", "lorawan"]
|
||||
|
||||
@ -35,3 +36,7 @@ rand = { version = "0.8.4", default-features = false }
|
||||
embedded-storage = "0.3.0"
|
||||
usbd-hid = "0.6.0"
|
||||
serde = { version = "1.0.136", default-features = false }
|
||||
|
||||
[[bin]]
|
||||
name = "usb_serial_winusb"
|
||||
required-features = ["msos-descriptor"]
|
||||
|
||||
139
examples/nrf52840/src/bin/usb_serial_winusb.rs
Normal file
139
examples/nrf52840/src/bin/usb_serial_winusb.rs
Normal file
@ -0,0 +1,139 @@
|
||||
#![no_std]
|
||||
#![no_main]
|
||||
#![feature(type_alias_impl_trait)]
|
||||
|
||||
use core::mem;
|
||||
|
||||
use defmt::{info, panic};
|
||||
use embassy_executor::Spawner;
|
||||
use embassy_futures::join::join;
|
||||
use embassy_nrf::usb::{Driver, Instance, PowerUsb, UsbSupply};
|
||||
use embassy_nrf::{interrupt, pac};
|
||||
use embassy_usb::class::cdc_acm::{CdcAcmClass, State};
|
||||
use embassy_usb::driver::EndpointError;
|
||||
use embassy_usb::msos::{self, windows_version};
|
||||
use embassy_usb::{Builder, Config};
|
||||
use {defmt_rtt as _, panic_probe as _};
|
||||
|
||||
const DEVICE_INTERFACE_GUIDS: &[u16] = {
|
||||
// Can't use defmt::panic in constant expressions (inside u16str!)
|
||||
macro_rules! panic {
|
||||
($($x:tt)*) => {
|
||||
{
|
||||
::core::panic!($($x)*);
|
||||
}
|
||||
};
|
||||
}
|
||||
msos::u16str!("{EAA9A5DC-30BA-44BC-9232-606CDC875321}\0\0").as_slice()
|
||||
};
|
||||
|
||||
#[embassy_executor::main]
|
||||
async fn main(_spawner: Spawner) {
|
||||
let p = embassy_nrf::init(Default::default());
|
||||
let clock: pac::CLOCK = unsafe { mem::transmute(()) };
|
||||
|
||||
info!("Enabling ext hfosc...");
|
||||
clock.tasks_hfclkstart.write(|w| unsafe { w.bits(1) });
|
||||
while clock.events_hfclkstarted.read().bits() != 1 {}
|
||||
|
||||
// Create the driver, from the HAL.
|
||||
let irq = interrupt::take!(USBD);
|
||||
let power_irq = interrupt::take!(POWER_CLOCK);
|
||||
let driver = Driver::new(p.USBD, irq, PowerUsb::new(power_irq));
|
||||
|
||||
// Create embassy-usb Config
|
||||
let mut config = Config::new(0xc0de, 0xcafe);
|
||||
config.manufacturer = Some("Embassy");
|
||||
config.product = Some("USB-serial example");
|
||||
config.serial_number = Some("12345678");
|
||||
config.max_power = 100;
|
||||
config.max_packet_size_0 = 64;
|
||||
|
||||
// Required for windows compatiblity.
|
||||
// https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.1/kconfig/CONFIG_CDC_ACM_IAD.html#help
|
||||
config.device_class = 0xEF;
|
||||
config.device_sub_class = 0x02;
|
||||
config.device_protocol = 0x01;
|
||||
config.composite_with_iads = true;
|
||||
|
||||
// Create embassy-usb DeviceBuilder using the driver and config.
|
||||
// It needs some buffers for building the descriptors.
|
||||
let mut device_descriptor = [0; 256];
|
||||
let mut config_descriptor = [0; 256];
|
||||
let mut bos_descriptor = [0; 256];
|
||||
let mut msos_descriptor = [0; 256];
|
||||
let mut control_buf = [0; 64];
|
||||
|
||||
let mut state = State::new();
|
||||
|
||||
let mut builder = Builder::new(
|
||||
driver,
|
||||
config,
|
||||
&mut device_descriptor,
|
||||
&mut config_descriptor,
|
||||
&mut bos_descriptor,
|
||||
&mut msos_descriptor,
|
||||
&mut control_buf,
|
||||
None,
|
||||
);
|
||||
|
||||
builder.msos_descriptor(windows_version::WIN8_1, 2);
|
||||
|
||||
// Create classes on the builder.
|
||||
let mut class = CdcAcmClass::new(&mut builder, &mut state, 64);
|
||||
|
||||
// Since we want to create MS OS feature descriptors that apply to a function that has already been added to the
|
||||
// builder, need to get the MsOsDescriptorWriter from the builder and manually add those descriptors.
|
||||
// Inside a class constructor, you would just need to call `FunctionBuilder::msos_feature` instead.
|
||||
let msos_writer = builder.msos_writer();
|
||||
msos_writer.configuration(0);
|
||||
msos_writer.function(0);
|
||||
msos_writer.function_feature(msos::CompatibleIdFeatureDescriptor::new("WINUSB", ""));
|
||||
msos_writer.function_feature(msos::RegistryPropertyFeatureDescriptor::new_multi_string(
|
||||
msos::RegistryPropertyFeatureDescriptor::DEVICE_INTERFACE_GUIDS_NAME,
|
||||
DEVICE_INTERFACE_GUIDS,
|
||||
));
|
||||
|
||||
// Build the builder.
|
||||
let mut usb = builder.build();
|
||||
|
||||
// Run the USB device.
|
||||
let usb_fut = usb.run();
|
||||
|
||||
// Do stuff with the class!
|
||||
let echo_fut = async {
|
||||
loop {
|
||||
class.wait_connection().await;
|
||||
info!("Connected");
|
||||
let _ = echo(&mut class).await;
|
||||
info!("Disconnected");
|
||||
}
|
||||
};
|
||||
|
||||
// Run everything concurrently.
|
||||
// If we had made everything `'static` above instead, we could do this using separate tasks instead.
|
||||
join(usb_fut, echo_fut).await;
|
||||
}
|
||||
|
||||
struct Disconnected {}
|
||||
|
||||
impl From<EndpointError> for Disconnected {
|
||||
fn from(val: EndpointError) -> Self {
|
||||
match val {
|
||||
EndpointError::BufferOverflow => panic!("Buffer overflow"),
|
||||
EndpointError::Disabled => Disconnected {},
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
async fn echo<'d, T: Instance + 'd, P: UsbSupply + 'd>(
|
||||
class: &mut CdcAcmClass<'d, Driver<'d, T, P>>,
|
||||
) -> Result<(), Disconnected> {
|
||||
let mut buf = [0; 64];
|
||||
loop {
|
||||
let n = class.read_packet(&mut buf).await?;
|
||||
let data = &buf[..n];
|
||||
info!("data: {:x}", data);
|
||||
class.write_packet(data).await?;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user