Rotating blinky

Cargo.toml

@@ -13,6 +13,7 @@ panic-halt = "1.0.0"
 panic-semihosting = "0.6"
 stm32f3 = { version = "0.16.0", features = ["stm32f303"] }
 stm32f3xx-hal = { version = "0.10.0", features = ["stm32f303xc"] }
+switch-hal = "0.4.0"
 
 # Uncomment for the panic example.
 # panic-itm = "0.4.1"

src/main.rs

@@ -2,6 +2,7 @@
 #![no_main]
 
 use core::fmt::Write;
+use core::slice::Iter;
 
 use cortex_m_semihosting::hprintln;
 // pick a panicking behavior
@@ -13,8 +14,120 @@ use panic_semihosting as _; // logs messages to the host stderr; requires a debu
 use cortex_m::peripheral::{syst, Peripherals};
 use cortex_m_rt::entry;
 
+use stm32f3xx_hal::delay;
 use stm32f3xx_hal::serial::Serial;
-use stm32f3xx_hal::{self as hal, pac, prelude::*};
+use stm32f3xx_hal::{
+    gpio::{self, gpioe},
+    pac,
+    prelude::*,
+};
+use switch_hal::{ActiveHigh, IntoSwitch, OutputSwitch, Switch};
+
+enum Direction {
+    North,
+    NorthEast,
+    East,
+    SouthEast,
+    South,
+    SouthWest,
+    West,
+    NorthWest,
+}
+
+impl Direction {
+    pub fn iter() -> Iter<'static, Direction> {
+        static DIRECTIONS: [Direction; 8] = [
+            Direction::North,
+            Direction::NorthEast,
+            Direction::East,
+            Direction::SouthEast,
+            Direction::South,
+            Direction::SouthWest,
+            Direction::West,
+            Direction::NorthWest,
+        ];
+        DIRECTIONS.iter()
+    }
+}
+
+type Led = Switch<gpioe::PEx<gpio::Output<gpio::PushPull>>, ActiveHigh>;
+struct Leds {
+    ld3: Led,
+    ld4: Led,
+    ld5: Led,
+    ld6: Led,
+    ld7: Led,
+    ld8: Led,
+    ld9: Led,
+    ld10: Led,
+}
+
+impl Leds {
+    fn new<PE8Mode, PE9Mode, PE10Mode, PE11Mode, PE12Mode, PE13Mode, PE14Mode, PE15Mode>(
+        pe8: gpioe::PE8<PE8Mode>,
+        pe9: gpioe::PE9<PE9Mode>,
+        pe10: gpioe::PE10<PE10Mode>,
+        pe11: gpioe::PE11<PE11Mode>,
+        pe12: gpioe::PE12<PE12Mode>,
+        pe13: gpioe::PE13<PE13Mode>,
+        pe14: gpioe::PE14<PE14Mode>,
+        pe15: gpioe::PE15<PE15Mode>,
+        moder: &mut gpioe::MODER,
+        otyper: &mut gpioe::OTYPER,
+    ) -> Self {
+        let mut leds = Self {
+            ld3: pe9
+                .into_push_pull_output(moder, otyper)
+                .downgrade()
+                .into_active_high_switch(),
+            ld4: pe8
+                .into_push_pull_output(moder, otyper)
+                .downgrade()
+                .into_active_high_switch(),
+            ld5: pe10
+                .into_push_pull_output(moder, otyper)
+                .downgrade()
+                .into_active_high_switch(),
+            ld6: pe15
+                .into_push_pull_output(moder, otyper)
+                .downgrade()
+                .into_active_high_switch(),
+            ld7: pe11
+                .into_push_pull_output(moder, otyper)
+                .downgrade()
+                .into_active_high_switch(),
+            ld8: pe14
+                .into_push_pull_output(moder, otyper)
+                .downgrade()
+                .into_active_high_switch(),
+            ld9: pe12
+                .into_push_pull_output(moder, otyper)
+                .downgrade()
+                .into_active_high_switch(),
+            ld10: pe13
+                .into_push_pull_output(moder, otyper)
+                .downgrade()
+                .into_active_high_switch(),
+        };
+        for dir in Direction::iter() {
+            leds.for_direction(dir).off().ok();
+        }
+        leds
+    }
+
+    pub fn for_direction(&mut self, direction: &Direction) -> &mut Led {
+        match direction {
+            Direction::North => &mut self.ld3,
+            Direction::NorthEast => &mut self.ld5,
+            Direction::East => &mut self.ld7,
+            Direction::SouthEast => &mut self.ld9,
+            Direction::South => &mut self.ld10,
+            Direction::SouthWest => &mut self.ld8,
+            Direction::West => &mut self.ld6,
+            Direction::NorthWest => &mut self.ld4,
+        }
+    }
+}
 
 #[entry]
 fn main() -> ! {
@@ -32,19 +145,19 @@ fn main() -> ! {
     systick.set_reload(8_000_000); // 1s
     systick.clear_current();
 
-    // PE9: LD3 (red)
-    // PE8: LD4 (blue)
-    // PE10: LD5 (orange)
     let mut gpioe = dp.GPIOE.split(&mut rcc.ahb);
-    let mut ld3 = gpioe
-        .pe9
-        .into_push_pull_output(&mut gpioe.moder, &mut gpioe.otyper);
-    let mut ld4 = gpioe
-        .pe8
-        .into_push_pull_output(&mut gpioe.moder, &mut gpioe.otyper);
-    let mut ld5 = gpioe
-        .pe10
-        .into_push_pull_output(&mut gpioe.moder, &mut gpioe.otyper);
+    let mut leds = Leds::new(
+        gpioe.pe8,
+        gpioe.pe9,
+        gpioe.pe10,
+        gpioe.pe11,
+        gpioe.pe12,
+        gpioe.pe13,
+        gpioe.pe14,
+        gpioe.pe15,
+        &mut gpioe.moder,
+        &mut gpioe.otyper,
+    );
 
     let mut gpioc = dp.GPIOC.split(&mut rcc.ahb);
     let pins = (
@@ -59,14 +172,21 @@ fn main() -> ! {
     );
 
     let mut uart = Serial::new(dp.USART1, pins, 115200.Bd(), clocks, &mut rcc.apb2);
-    systick.enable_counter();
+
+    let mut delay = delay::Delay::new(systick, clocks);
+
     let mut enabled = true;
     loop {
-        while !systick.has_wrapped() {}
         enabled = !enabled;
-        ld3.toggle().unwrap();
-        ld4.toggle().unwrap();
-        ld5.toggle().unwrap();
+        for dir in Direction::iter() {
+            let led = leds.for_direction(dir);
+            if enabled {
+                led.on().ok();
+            } else {
+                led.off().ok();
+            }
+            delay.delay_ms(50u16);
+        }
         uart.write_str("Loop\r\n").unwrap();
         hprintln!("Loop");
     }