8b71e0d9ec
Spike 4. Drive the ESP-IDF USB Host Library directly through the raw esp-idf-sys bindings (the convenience HID class driver is a managed component not vendored in mainline, and a boot keyboard doesn't need it). On attach, src/usb_kbd.rs enumerates the device and dumps its descriptors, claims the boot-keyboard interface, sends SET_PROTOCOL(boot) and SET_IDLE(0), then polls the interrupt-IN endpoint and decodes each 8-byte report into modifiers + keycodes logged over UART. main.rs becomes the Spike 4 harness; the epd module is kept compiled (allow(dead_code)) so it doesn't bit-rot. Verified on hardware with a 19f5:3255 keyboard: letters, digits, modifiers, and rollover all decode.
24 lines
948 B
Rust
24 lines
948 B
Rust
// epd is proven (Spike 2) but unused by the Spike 4 harness; keep it compiled
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// so it doesn't bit-rot while USB host bring-up is in progress.
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#[allow(dead_code)]
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mod epd;
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mod usb_kbd;
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/// Injected by build.rs so serial output identifies the exact build.
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const BUILD_TAG: &str = concat!("build ", env!("BUILD_TIME"), " @", env!("BUILD_GIT"));
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fn main() -> anyhow::Result<()> {
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// Required once before any esp-idf-svc call; some runtime patches
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// only link if this symbol is referenced. See esp-idf-template#71.
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esp_idf_svc::sys::link_patches();
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esp_idf_svc::log::EspLogger::initialize_default();
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log::info!("Typoena Spike 4 — USB host keyboard, {BUILD_TAG}");
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log::info!("Plug the keyboard into the native USB port, then type.");
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// Runs forever: installs the USB Host Library and logs descriptors of any
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// device that attaches. Returns only on a fatal host-library error.
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usb_kbd::run()?;
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Ok(())
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}
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