mirror of
https://github.com/ferrous-systems/embedded-trainings-2020.git
synced 2024-05-19 08:48:17 +00:00
f829ad46ae
- add 'project from scratch' section to the beginner workshop
93 lines
2.5 KiB
Rust
93 lines
2.5 KiB
Rust
#![no_main]
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#![no_std]
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use dk::{
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peripheral::USBD,
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usbd::{self, Ep0In, Event},
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};
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use panic_log as _; // panic handler
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// use one of these
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// use usb::{Descriptor, Request}; // your implementation
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use usb2::{GetDescriptor as Descriptor, StandardRequest as Request}; // crates.io impl
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#[rtic::app(device = dk)]
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const APP: () = {
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struct Resources {
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usbd: USBD,
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ep0in: Ep0In,
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}
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#[init]
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fn init(_cx: init::Context) -> init::LateResources {
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let board = dk::init().unwrap();
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usbd::init(board.power, &board.usbd);
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usbd::connect(&board.usbd);
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init::LateResources {
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ep0in: board.ep0in,
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usbd: board.usbd,
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}
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}
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#[task(binds = USBD, resources = [usbd, ep0in])]
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fn on_usbd(cx: on_usbd::Context) {
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let usbd = cx.resources.usbd;
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let ep0in = cx.resources.ep0in;
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while let Some(event) = usbd::next_event(usbd) {
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on_event(usbd, ep0in, event)
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}
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}
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};
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fn on_event(usbd: &USBD, ep0in: &mut Ep0In, event: Event) {
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log::info!("USB: {:?}", event);
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match event {
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Event::UsbReset => {
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// nothing to do here at the moment
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}
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Event::UsbEp0DataDone => usbd::todo(usbd),
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Event::UsbEp0Setup => {
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let bmrequesttype = usbd.bmrequesttype.read().bits() as u8;
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let brequest = usbd.brequest.read().brequest().bits();
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let wlength = usbd::wlength(usbd);
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let windex = usbd::windex(usbd);
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let wvalue = usbd::wvalue(usbd);
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log::info!(
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"bmrequesttype: {}, brequest: {}, wlength: {}, windex: {}, wvalue: {}",
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bmrequesttype,
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brequest,
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wlength,
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windex,
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wvalue
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);
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if let Ok(Request::GetDescriptor { descriptor, length }) =
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Request::parse(bmrequesttype, brequest, wvalue, windex, wlength)
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{
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match descriptor {
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Descriptor::Device => {
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log::info!("GET_DESCRIPTOR Device [length={}]", length);
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// FIXME send back a valid device descriptor, truncated to `length` bytes
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// let desc = usb2::device::Descriptor { .. };
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let resp = [];
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let _ = ep0in.start(&resp, usbd);
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}
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_ => usbd::todo(usbd),
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}
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} else {
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usbd::todo(usbd)
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}
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}
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}
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}
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