New VA108xx Rust workspace structure + dependency updates

- The workspace is now a monorepo without submodules. The HAL, PAC and BSP
  are integrated directly
- Update all dependencies: embedded-hal v1 and RTIC v2

vorago-reb1/src/button.rs

@@ -0,0 +1,66 @@
+//! # API for the REB1 button
+//!
+//! ## Examples
+//!
+//! - [Button Blinky with IRQs](https://egit.irs.uni-stuttgart.de/rust/vorago-reb1/src/branch/main/examples/blinky-button-irq.rs)
+//! - [Button Blinky with IRQs and RTIC](https://egit.irs.uni-stuttgart.de/rust/vorago-reb1/src/branch/main/examples/blinky-button-rtic.rs)
+use embedded_hal::digital::InputPin;
+use va108xx_hal::{
+    gpio::{FilterClkSel, FilterType, InputFloating, InterruptEdge, InterruptLevel, Pin, PA11},
+    pac, IrqCfg,
+};
+
+pub struct Button {
+    button: Pin<PA11, InputFloating>,
+}
+
+impl Button {
+    pub fn new(pin: Pin<PA11, InputFloating>) -> Button {
+        Button { button: pin }
+    }
+
+    #[inline]
+    pub fn pressed(&mut self) -> bool {
+        self.button.is_low().ok().unwrap()
+    }
+
+    #[inline]
+    pub fn released(&mut self) -> bool {
+        self.button.is_high().ok().unwrap()
+    }
+
+    /// Configures an IRQ on edge.
+    pub fn edge_irq(
+        mut self,
+        edge_type: InterruptEdge,
+        irq_cfg: IrqCfg,
+        syscfg: Option<&mut pac::Sysconfig>,
+        irqsel: Option<&mut pac::Irqsel>,
+    ) -> Self {
+        self.button = self
+            .button
+            .interrupt_edge(edge_type, irq_cfg, syscfg, irqsel);
+        self
+    }
+
+    /// Configures an IRQ on level.
+    pub fn level_irq(
+        mut self,
+        level: InterruptLevel,
+        irq_cfg: IrqCfg,
+        syscfg: Option<&mut pac::Sysconfig>,
+        irqsel: Option<&mut pac::Irqsel>,
+    ) -> Self {
+        self.button = self.button.interrupt_level(level, irq_cfg, syscfg, irqsel);
+        self
+    }
+
+    /// Configures a filter on the button. This can be useful for debouncing the switch.
+    ///
+    /// Please note that you still have to set a clock divisor yourself using the
+    /// [`va108xx_hal::clock::set_clk_div_register`] function in order for this to work.
+    pub fn filter_type(mut self, filter: FilterType, clksel: FilterClkSel) -> Self {
+        self.button = self.button.filter_type(filter, clksel);
+        self
+    }
+}