first compiling firmware

6 files changed, 668 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2ab2f5c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/firmware/target
+**/*.rs.bk
+*~
+*.bin
diff --git a/firmware/.cargo/config b/firmware/.cargo/config
new file mode 100644
index 0000000..1a57e27
--- /dev/null
+++ b/firmware/.cargo/config
@@ -0,0 +1,12 @@
+[target.thumbv6m-none-eabi]
+
+# uncomment ONE of these three option to make `cargo run` start a GDB session
+# which option to pick depends on your system
+runner = "arm-none-eabi-gdb -q -x openocd.gdb"
+# runner = "gdb-multiarch -q -x openocd.gdb"
+# runner = "gdb -q -x openocd.gdb"
+
+rustflags = ["-C", "link-arg=-Tlink.x"]
+
+[build]
+target = "thumbv6m-none-eabi"
diff --git a/firmware/Cargo.lock b/firmware/Cargo.lock
new file mode 100644
index 0000000..f7eadcc
--- /dev/null
+++ b/firmware/Cargo.lock
@@ -0,0 +1,411 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
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+ "usb-device",
+]
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+[[package]]
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+ "generic-array 0.13.2",
+ "keyberon",
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+ "vcell",
+]
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+ "cast",
+ "cortex-m",
+ "embedded-hal",
+ "nb 0.1.3",
+ "stm32-usbd",
+ "stm32f0",
+ "void",
+]
+
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+ "vcell",
+]
diff --git a/firmware/Cargo.toml b/firmware/Cargo.toml
new file mode 100644
index 0000000..b2a31b1
--- /dev/null
+++ b/firmware/Cargo.toml
@@ -0,0 +1,22 @@
+[package]
+name = "keyberon-f4"
+version = "0.1.0"
+authors = ["Guillaume Pinot <texitoi@texitoi.eu>"]
+edition = "2018"
+
+[dependencies]
+stm32f0xx-hal = { version = "0.17.0", features = ["rt", "stm32f072", "stm32-usbd"] }
+cortex-m = "0.6"
+cortex-m-rt = { version = "0.6.10", features = ["device"] }
+panic-halt = "0.2.0"
+keyberon = { git = "https://github.com/TeXitoi/keyberon" }
+cortex-m-rtfm = "0.5"
+generic-array = "0.13"
+embedded-hal = "0.2"
+usb-device = "0.2.0"
+
+[profile.release]
+lto = true
+incremental = false
+opt-level = "z"
+debug = true
diff --git a/firmware/memory.x b/firmware/memory.x
new file mode 100644
index 0000000..5153cb7
--- /dev/null
+++ b/firmware/memory.x
@@ -0,0 +1,6 @@
+/* Linker script for the STM32F103C8T6 */
+MEMORY
+{
+  FLASH : ORIGIN = 0x08000000, LENGTH = 128K
+  RAM : ORIGIN = 0x20000000, LENGTH = 16K
+}
diff --git a/firmware/src/main.rs b/firmware/src/main.rs
new file mode 100644
index 0000000..9c261c0
--- /dev/null
+++ b/firmware/src/main.rs
@@ -0,0 +1,213 @@
+#![no_main]
+#![no_std]
+
+// set the panic handler
+use panic_halt as _;
+
+use core::convert::Infallible;
+use embedded_hal::digital::v2::{InputPin, OutputPin};
+use generic_array::typenum::{U4, U6};
+use keyberon::action::{k, l, m, Action, Action::*};
+use keyberon::debounce::Debouncer;
+use keyberon::impl_heterogenous_array;
+use keyberon::key_code::KbHidReport;
+use keyberon::key_code::KeyCode::{self, *};
+use keyberon::layout::Layout;
+use keyberon::matrix::{Matrix, PressedKeys};
+use rtfm::app;
+use stm32f0xx_hal::gpio::{gpioa, gpiob, Input, Output, PullUp, PushPull};
+use stm32f0xx_hal::prelude::*;
+use stm32f0xx_hal::usb;
+use stm32f0xx_hal::{stm32, timers};
+use usb_device::bus::UsbBusAllocator;
+use usb_device::class::UsbClass as _;
+
+type UsbClass = keyberon::Class<'static, usb::UsbBusType, ()>;
+type UsbDevice = keyberon::Device<'static, usb::UsbBusType>;
+
+pub struct Cols(
+    gpioa::PA15<Input<PullUp>>,
+    gpiob::PB3<Input<PullUp>>,
+    gpiob::PB4<Input<PullUp>>,
+    gpiob::PB5<Input<PullUp>>,
+    gpiob::PB8<Input<PullUp>>,
+    gpiob::PB9<Input<PullUp>>,
+);
+impl_heterogenous_array! {
+    Cols,
+    dyn InputPin<Error = Infallible>,
+    U6,
+    [0, 1, 2, 3, 4, 5]
+}
+
+pub struct Rows(
+    gpiob::PB0<Output<PushPull>>,
+    gpiob::PB1<Output<PushPull>>,
+    gpiob::PB2<Output<PushPull>>,
+    gpiob::PB10<Output<PushPull>>,
+);
+impl_heterogenous_array! {
+    Rows,
+    dyn OutputPin<Error = Infallible>,
+    U4,
+    [0, 1, 2, 3]
+}
+
+const CUT: Action = m(&[LShift, Delete]);
+const COPY: Action = m(&[LCtrl, Insert]);
+const PASTE: Action = m(&[LShift, Insert]);
+const L2_ENTER: Action = HoldTap {
+    timeout: 200,
+    hold: &l(2),
+    tap: &k(Enter),
+};
+const L1_SP: Action = HoldTap {
+    timeout: 200,
+    hold: &l(1),
+    tap: &k(Space),
+};
+const CSPACE: Action = m(&[LCtrl, Space]);
+macro_rules! s {
+    ($k:ident) => {
+        m(&[LShift, $k])
+    };
+}
+macro_rules! a {
+    ($k:ident) => {
+        m(&[RAlt, $k])
+    };
+}
+
+// The 13th column is the hardware button of the development board,
+// thus all the column is activated when the button is pushed. Because
+// of that, only one action is defined in the 13th column.
+#[rustfmt::skip]
+pub static LAYERS: keyberon::layout::Layers = &[
+    &[
+        &[k(Tab),     k(Q), k(W),  k(E),    k(R), k(T),    k(Y),     k(U),    k(I),   k(O),    k(P),     k(LBracket)],
+        &[k(RBracket),k(A), k(S),  k(D),    k(F), k(G),    k(H),     k(J),    k(K),   k(L),    k(SColon),k(Quote)   ],
+        &[k(Equal),   k(Z), k(X),  k(C),    k(V), k(B),    k(N),     k(M),    k(Comma),k(Dot), k(Slash), k(Bslash)  ],
+        &[Trans,      Trans,k(LGui),k(LAlt),L1_SP,k(LCtrl),k(RShift),L2_ENTER,k(RAlt),k(BSpace),Trans,   Trans      ],
+    ], &[
+        &[Trans,         k(Pause),Trans,     k(PScreen),Trans,    Trans,Trans,      Trans,  k(Delete),Trans,  Trans,   Trans ],
+        &[Trans,         Trans,   k(NumLock),k(Insert), k(Escape),Trans,k(CapsLock),k(Left),k(Down),  k(Up),  k(Right),Trans ],
+        &[k(NonUsBslash),k(Undo), CUT,       COPY,      PASTE,    Trans,Trans,      k(Home),k(PgDown),k(PgUp),k(End),  Trans ],
+        &[Trans,         Trans,   Trans,     Trans,     Trans,    Trans,Trans,      Trans,  Trans,    Trans,  Trans,   Trans ],
+    ], &[
+        &[s!(Grave),s!(Kb1),s!(Kb2),s!(Kb3),s!(Kb4),s!(Kb5),s!(Kb6),s!(Kb7),s!(Kb8),s!(Kb9),s!(Kb0),s!(Minus)],
+        &[ k(Grave), k(Kb1), k(Kb2), k(Kb3), k(Kb4), k(Kb5), k(Kb6), k(Kb7), k(Kb8), k(Kb9), k(Kb0), k(Minus)],
+        &[a!(Grave),a!(Kb1),a!(Kb2),a!(Kb3),a!(Kb4),a!(Kb5),a!(Kb6),a!(Kb7),a!(Kb8),a!(Kb9),a!(Kb0),a!(Minus)],
+        &[Trans,    Trans,  Trans,  Trans,  CSPACE, Trans,  Trans,  Trans,  Trans,  Trans,  Trans,  Trans    ],
+    ], &[
+        &[k(F1),k(F2),k(F3),k(F4),k(F5),k(F6),k(F7),k(F8),k(F9),k(F10),k(F11),k(F12)],
+        &[Trans,Trans,Trans,Trans,Trans,Trans,Trans,Trans,Trans,Trans, Trans, Trans ],
+        &[Trans,Trans,Trans,Trans,Trans,Trans,Trans,Trans,Trans,Trans, Trans, Trans ],
+        &[Trans,Trans,Trans,Trans,Trans,Trans,Trans,Trans,Trans,Trans, Trans, Trans ],
+    ],
+];
+
+#[app(device = stm32f0xx_hal::stm32, peripherals = true)]
+const APP: () = {
+    struct Resources {
+        usb_dev: UsbDevice,
+        usb_class: UsbClass,
+        matrix: Matrix<Cols, Rows>,
+        debouncer: Debouncer<PressedKeys<U4, U6>>,
+        layout: Layout,
+        timer: timers::Timer<stm32::TIM3>,
+    }
+
+    #[init]
+    fn init(mut c: init::Context) -> init::LateResources {
+        static mut USB_BUS: Option<UsbBusAllocator<usb::UsbBusType>> = None;
+
+        let mut rcc = c
+            .device
+            .RCC
+            .configure()
+            .hsi48()
+            .enable_crs(c.device.CRS)
+            .sysclk(48.mhz())
+            .pclk(24.mhz())
+            .freeze(&mut c.device.FLASH);
+
+        let gpioa = c.device.GPIOA.split(&mut rcc);
+        let gpiob = c.device.GPIOB.split(&mut rcc);
+
+        let usb = usb::Peripheral {
+            usb: c.device.USB,
+            pin_dm: gpioa.pa11,
+            pin_dp: gpioa.pa12,
+        };
+        *USB_BUS = Some(usb::UsbBusType::new(usb));
+        let usb_bus = USB_BUS.as_ref().unwrap();
+
+        let usb_class = keyberon::new_class(usb_bus, ());
+        let usb_dev = keyberon::new_device(usb_bus);
+
+        let mut timer = timers::Timer::tim3(c.device.TIM3, 1.khz(), &mut rcc);
+        timer.listen(timers::Event::TimeOut);
+
+        let pa15 = gpioa.pa15;
+        let matrix = cortex_m::interrupt::free(move |cs| {
+            Matrix::new(
+                Cols(
+                    pa15.into_pull_up_input(cs),
+                    gpiob.pb3.into_pull_up_input(cs),
+                    gpiob.pb4.into_pull_up_input(cs),
+                    gpiob.pb5.into_pull_up_input(cs),
+                    gpiob.pb8.into_pull_up_input(cs),
+                    gpiob.pb9.into_pull_up_input(cs),
+                ),
+                Rows(
+                    gpiob.pb0.into_push_pull_output(cs),
+                    gpiob.pb1.into_push_pull_output(cs),
+                    gpiob.pb2.into_push_pull_output(cs),
+                    gpiob.pb10.into_push_pull_output(cs),
+                ),
+            )
+        });
+
+        init::LateResources {
+            usb_dev,
+            usb_class,
+            timer,
+            debouncer: Debouncer::new(PressedKeys::default(), PressedKeys::default(), 5),
+            matrix: matrix.unwrap(),
+            layout: Layout::new(LAYERS),
+        }
+    }
+
+    #[task(binds = USB, priority = 2, resources = [usb_dev, usb_class])]
+    fn usb_rx(mut c: usb_rx::Context) {
+        usb_poll(&mut c.resources.usb_dev, &mut c.resources.usb_class);
+    }
+
+    #[task(binds = TIM3, priority = 1, resources = [usb_class, matrix, debouncer, layout, timer])]
+    fn tick(mut c: tick::Context) {
+        c.resources.timer.wait().ok();
+
+        for event in c
+            .resources
+            .debouncer
+            .events(c.resources.matrix.get().unwrap())
+        {
+            send_report(c.resources.layout.event(event), &mut c.resources.usb_class);
+        }
+        send_report(c.resources.layout.tick(), &mut c.resources.usb_class);
+    }
+};
+
+fn send_report(iter: impl Iterator<Item = KeyCode>, usb_class: &mut resources::usb_class<'_>) {
+    use rtfm::Mutex;
+    let report: KbHidReport = iter.collect();
+    if usb_class.lock(|k| k.device_mut().set_keyboard_report(report.clone())) {
+        while let Ok(0) = usb_class.lock(|k| k.write(report.as_bytes())) {}
+    }
+}
+
+fn usb_poll(usb_dev: &mut UsbDevice, keyboard: &mut UsbClass) {
+    if usb_dev.poll(&mut [keyboard]) {
+        keyboard.poll();
+    }
+}