examples(pygamer): Restore neopixel examples using SPI driver

boards/pygamer/Cargo.toml

@@ -33,6 +33,11 @@ version = "0.20.0"
 optional = true
 version = "0.3.2"
 
+[dependencies.ws2812-spi]
+version = "0.5.0"
+features = ["mosi_idle_high"]
+optional = true
+
 [dev-dependencies]
 embedded-graphics = "0.8.1"
 embedded-sdmmc = "0.8.0"
@@ -52,6 +57,7 @@ max-channels = ["dma", "atsamd-hal/max-channels"]
 panic_led = []
 rt = ["cortex-m-rt", "atsamd-hal/samd51j-rt"]
 usb = ["atsamd-hal/usb", "usb-device"]
+neopixel-spi = ["dep:ws2812-spi"]
 # Enable async support from atsamd-hal
 async = ["atsamd-hal/async"]
 
@@ -89,3 +95,23 @@ name = "timer"
 [[example]]
 name = "usb_poll"
 required-features = ["usb"]
+
+[[example]]
+name = "neopixel_adc_battery"
+required-features = ["neopixel-spi"]
+
+[[example]]
+name = "neopixel_adc_light"
+required-features = ["neopixel-spi"]
+
+[[example]]
+name = "neopixel_button"
+required-features = ["neopixel-spi"]
+
+[[example]]
+name = "neopixel_easing"
+required-features = ["neopixel-spi"]
+
+[[example]]
+name = "neopixel_rainbow"
+required-features = ["neopixel-spi"]

boards/pygamer/examples/neopixel_adc_battery.rs

@@ -0,0 +1,89 @@
+//! Display battery percentage on the neopixels.
+//!
+//! Note leds may appear white during debug. Either build for release or add
+//! opt-level = 2 to profile.dev in Cargo.toml
+
+#![no_std]
+#![no_main]
+
+#[cfg(not(feature = "panic_led"))]
+use panic_halt as _;
+use pygamer::{entry, hal, pac, Pins};
+
+use hal::adc::Adc;
+use hal::{clock::GenericClockController, delay::Delay};
+
+use pac::gclk::pchctrl::Genselect::Gclk11;
+
+use hal::ehal::delay::DelayNs;
+
+use pac::{CorePeripherals, Peripherals};
+use smart_leds::{brightness, SmartLedsWrite, RGB8};
+
+#[entry]
+fn main() -> ! {
+    let mut peripherals = Peripherals::take().unwrap();
+    let core = CorePeripherals::take().unwrap();
+    let mut clocks = GenericClockController::with_internal_32kosc(
+        peripherals.gclk,
+        &mut peripherals.mclk,
+        &mut peripherals.osc32kctrl,
+        &mut peripherals.oscctrl,
+        &mut peripherals.nvmctrl,
+    );
+    let pins = Pins::new(peripherals.port).split();
+
+    let mut adc0 = Adc::adc0(peripherals.adc0, &mut peripherals.mclk, &mut clocks, Gclk11);
+    let mut battery = pins.battery.init();
+
+    // neopixels
+    let mut neopixel = pins.neopixel.init_spi(
+        &mut clocks,
+        // Unfortunately, the SPI driver requires a clock pin, even though it's not used by the
+        // neopixels.
+        pins.i2c.scl,
+        peripherals.sercom2,
+        &mut peripherals.mclk,
+    );
+
+    let mut delay = Delay::new(core.SYST, &mut clocks);
+
+    //todo put this on a .. 10minute, 30min, update timer
+    loop {
+        let battery_data = battery.read(&mut adc0);
+
+        let mut colors = [
+            RGB8::default(),
+            RGB8::default(),
+            RGB8::default(),
+            RGB8::default(),
+            RGB8::default(),
+        ];
+
+        if battery_data < 3.6 {
+            enable_leds(1, &mut colors);
+        } else if (3.6..3.8).contains(&battery_data) {
+            enable_leds(2, &mut colors);
+        } else if (3.8..3.9).contains(&battery_data) {
+            enable_leds(3, &mut colors);
+        } else if (3.9..4.0).contains(&battery_data) {
+            enable_leds(4, &mut colors);
+        } else {
+            enable_leds(5, &mut colors);
+        };
+
+        neopixel
+            .write(brightness(colors.iter().cloned(), 1))
+            .unwrap();
+
+        // Reset the LEDs
+        delay.delay_ms(10);
+    }
+}
+
+/// Turn on the specified number of LEDs and set the color to red.
+fn enable_leds(num_leds: usize, colors: &mut [RGB8]) {
+    for color in colors.iter_mut().take(num_leds) {
+        *color = RGB8::from((255, 0, 0));
+    }
+}

boards/pygamer/examples/neopixel_adc_light.rs

@@ -0,0 +1,88 @@
+//! Display light sensor reading on the neopixels.
+//!
+//! Note leds may appear white during debug. Either build for release or add
+//! opt-level = 2 to profile.dev in Cargo.toml
+
+#![no_std]
+#![no_main]
+
+#[cfg(not(feature = "panic_led"))]
+use panic_halt as _;
+use pygamer::{entry, hal, pac, Pins};
+
+use hal::adc::Adc;
+use hal::prelude::*;
+use hal::{clock::GenericClockController, delay::Delay};
+use pac::gclk::pchctrl::Genselect::Gclk11;
+use pac::{CorePeripherals, Peripherals};
+use smart_leds::SmartLedsWrite;
+use smart_leds::{
+    hsv::{hsv2rgb, Hsv},
+    RGB8,
+};
+
+#[entry]
+fn main() -> ! {
+    let mut peripherals = Peripherals::take().unwrap();
+    let core = CorePeripherals::take().unwrap();
+    let mut clocks = GenericClockController::with_internal_32kosc(
+        peripherals.gclk,
+        &mut peripherals.mclk,
+        &mut peripherals.osc32kctrl,
+        &mut peripherals.oscctrl,
+        &mut peripherals.nvmctrl,
+    );
+    let pins = Pins::new(peripherals.port).split();
+
+    let mut adc1 = Adc::adc1(peripherals.adc1, &mut peripherals.mclk, &mut clocks, Gclk11);
+    let mut light = pins.light_pin.into_alternate();
+
+    // neopixels
+    let mut neopixel = pins.neopixel.init_spi(
+        &mut clocks,
+        // Unfortunately, the SPI driver requires a clock pin, even though it's not used by the
+        // neopixels.
+        pins.i2c.scl,
+        peripherals.sercom2,
+        &mut peripherals.mclk,
+    );
+
+    let mut delay = Delay::new(core.SYST, &mut clocks);
+
+    const NUM_LEDS: usize = 5;
+    let mut j: u8 = 0;
+
+    loop {
+        let light_data: u16 = adc1.read(&mut light).unwrap();
+
+        let pos: usize = if light_data < 100 {
+            0
+        } else if (147..1048).contains(&light_data) {
+            1
+        } else if (1048..3048).contains(&light_data) {
+            2
+        } else if (3048..3948).contains(&light_data) {
+            3
+        } else {
+            4
+        };
+
+        //finally paint the one led wherever the position is
+        let _ = neopixel.write((0..NUM_LEDS).map(|i| {
+            if i == pos {
+                hsv2rgb(Hsv {
+                    hue: j,
+                    sat: 255,
+                    val: 32,
+                })
+            } else {
+                RGB8::default()
+            }
+        }));
+
+        //incremement the hue easing
+        j = j.wrapping_add(1);
+
+        delay.delay_ms(10u8);
+    }
+}

boards/pygamer/examples/neopixel_button.rs

@@ -0,0 +1,115 @@
+//! Joystick y controls the color of a neopixel while Joystick x moves it
+//! left and right around the center neopixel
+//! Select and Start control a second neopixel left and right while it is
+//! automatically rotating through the color wheel
+//! When they overlap, joystick takes precedence
+//!
+//! Note leds may appear white during debug. Either build for release or add
+//! opt-level = 2 to profile.dev in Cargo.toml
+
+#![no_std]
+#![no_main]
+
+#[cfg(not(feature = "panic_led"))]
+use panic_halt as _;
+use pygamer::{self as bsp, entry, hal, pac, pins::Keys, Pins};
+
+use bsp::util::map_from;
+use hal::adc::Adc;
+use hal::{clock::GenericClockController, delay::Delay};
+
+use pac::gclk::pchctrl::Genselect::Gclk11;
+use pac::{CorePeripherals, Peripherals};
+
+use hal::ehal::delay::DelayNs;
+
+use smart_leds::SmartLedsWrite;
+use smart_leds::{
+    hsv::{hsv2rgb, Hsv},
+    RGB8,
+};
+
+#[entry]
+fn main() -> ! {
+    let mut peripherals = Peripherals::take().unwrap();
+    let core_peripherals = CorePeripherals::take().unwrap();
+
+    let mut clocks = GenericClockController::with_internal_32kosc(
+        peripherals.gclk,
+        &mut peripherals.mclk,
+        &mut peripherals.osc32kctrl,
+        &mut peripherals.oscctrl,
+        &mut peripherals.nvmctrl,
+    );
+
+    let mut delay = Delay::new(core_peripherals.SYST, &mut clocks);
+    let pins = Pins::new(peripherals.port).split();
+
+    let mut buttons = pins.buttons.init();
+
+    let mut adc1 = Adc::adc1(peripherals.adc1, &mut peripherals.mclk, &mut clocks, Gclk11);
+    let mut joystick = pins.joystick.init();
+
+    // neopixels
+    let mut neopixel = pins.neopixel.init_spi(
+        &mut clocks,
+        // Unfortunately, the SPI driver requires a clock pin, even though it's not used by the
+        // neopixels.
+        pins.i2c.scl,
+        peripherals.sercom2,
+        &mut peripherals.mclk,
+    );
+
+    const NUM_LEDS: usize = 5;
+    let mut pos_button: usize = 2;
+    let mut color_button: u8 = 0;
+    loop {
+        let (x, y) = joystick.read(&mut adc1);
+
+        // map up/down to control rainbow color 0-255
+        let color_joy = map_from(y as i16, (0, 4095), (0, 255)) as u8;
+
+        // map left/right to neopixel position 0-4
+        // joystick is not quite linear, rests at second pixel
+        // shifting up by 500 seems to help
+        let pos_joy = map_from(x as i16 + 500, (0, 4595), (0, 4)) as usize;
+
+        for event in buttons.events() {
+            match event {
+                Keys::SelectDown => {
+                    pos_button = pos_button.saturating_sub(1);
+                }
+                Keys::StartDown => {
+                    if pos_button < 4 {
+                        pos_button += 1;
+                    }
+                }
+                _ => {}
+            }
+        }
+
+        //finally paint the two leds at position, accel priority
+        let _ = neopixel.write((0..NUM_LEDS).map(|i| {
+            if i == pos_joy {
+                hsv2rgb(Hsv {
+                    hue: color_joy,
+                    sat: 255,
+                    val: 32,
+                })
+            } else if i == pos_button {
+                hsv2rgb(Hsv {
+                    hue: color_button,
+                    sat: 255,
+                    val: 32,
+                })
+            } else {
+                RGB8::default()
+            }
+        }));
+
+        //incremement the hue easing
+        color_button = color_button.wrapping_add(1);
+
+        delay.delay_ms(5);
+    }
+}