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@ -33,7 +33,7 @@ use hal::{
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},
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pac::I2C1,
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prelude::*,
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timer::{Alarm, Alarm0, Alarm1},
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timer::{Alarm, Alarm0, Alarm1, Alarm2},
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Adc,
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};
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@ -44,8 +44,8 @@ const HEAP_SIZE: usize = 1024;
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const XTAL_FREQ_HZ: u32 = 12_000_000u32;
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const MVG_AVG_COUNT: u16 = 20;
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const DISPLAY_UPDATE_INT_TICKS: u32 = 500_000;
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const SENSOR_READ_INT_TICKS: u32 = 50_000;
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const DISPLAY_UPDATE_INT_TICKS: u32 = 2_000_000;
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const SENSOR_READ_INT_TICKS: u32 = 1_000_000;
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const AIR_QUALITY_THRESHOLD: u16 = 480;
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const AIR_QUALITY_THRESHOLD_LOWER: u16 = 400;
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@ -72,8 +72,8 @@ mod app {
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struct Shared {
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alarm0: Alarm0,
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alarm1: Alarm1,
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alarm2: Alarm2,
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sensor_value: u16,
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led: LED,
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}
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#[local]
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@ -83,6 +83,8 @@ mod app {
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adc_pin: Pin<hal::gpio::bank0::Gpio29, hal::gpio::FloatingInput>,
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watchdog: hal::Watchdog,
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use_lower_limit: bool,
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led: LED,
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led_color: smart_leds::RGB<u8>,
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}
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#[init()]
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@ -121,6 +123,10 @@ mod app {
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let _ = alarm1.schedule(MicrosDurationU32::from_ticks(SENSOR_READ_INT_TICKS));
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alarm1.enable_interrupt();
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let mut alarm2 = timer.alarm_2().unwrap();
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let _ = alarm2.schedule(MicrosDurationU32::from_ticks(DISPLAY_UPDATE_INT_TICKS));
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alarm2.enable_interrupt();
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let (mut pio, sm0, _, _, _) = c.device.PIO0.split(&mut resets);
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let mut led = ws2812_pio::Ws2812::new(
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pins.gpio16.into_mode(),
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@ -130,8 +136,6 @@ mod app {
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unsafe { core::mem::transmute(timer.count_down()) },
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);
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led.write([RGB8::new(255, 255, 0)].iter().copied()).unwrap();
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let scl = pins.gpio15.into_mode();
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let sda = pins.gpio14.into_mode();
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let i2c = i2c::I2C::i2c1(
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@ -152,8 +156,8 @@ mod app {
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Shared {
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alarm0,
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alarm1,
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alarm2,
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sensor_value: adc.read(&mut adc_pin).unwrap(),
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led,
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},
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Local {
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display,
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@ -161,6 +165,8 @@ mod app {
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adc_pin,
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watchdog,
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use_lower_limit: false,
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led,
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led_color: RGB8::new(255, 255, 255),
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},
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init::Monotonics(),
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)
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@ -197,7 +203,7 @@ mod app {
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let text = c.shared.sensor_value.lock(|val| format!("{val}"));
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let display = c.local.display;
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display.clear();
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display.clear(BinaryColor::Off).unwrap();
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Text::with_alignment(
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&text,
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display.bounding_box().center(),
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@ -214,14 +220,24 @@ mod app {
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});
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}
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#[task(binds = TIMER_IRQ_1, priority = 2, shared = [alarm1, sensor_value, led], local = [adc, adc_pin, watchdog, use_lower_limit])]
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#[task(binds = TIMER_IRQ_1, priority = 2, shared = [alarm1, sensor_value], local = [adc, adc_pin, watchdog])]
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fn read_sensor(mut c: read_sensor::Context) {
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let mut sensor_value: u16 = c.local.adc.read(c.local.adc_pin).unwrap();
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sensor_value = c.shared.sensor_value.lock(|v| {
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let sensor_value: u16 = c.local.adc.read(c.local.adc_pin).unwrap();
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c.shared.sensor_value.lock(|v| {
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*v = (*v * (MVG_AVG_COUNT - 1) + sensor_value) / MVG_AVG_COUNT;
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*v
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});
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c.local.watchdog.feed();
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c.shared.alarm1.lock(|a| {
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a.clear_interrupt();
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let _ = a.schedule(MicrosDurationU32::from_ticks(DISPLAY_UPDATE_INT_TICKS));
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});
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}
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#[task(binds=TIMER_IRQ_2, priority = 1, shared = [alarm2, sensor_value], local = [led, led_color, use_lower_limit])]
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fn update_led(mut c: update_led::Context) {
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let sensor_value = c.shared.sensor_value.lock(|v| *v);
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if sensor_value >= AIR_QUALITY_THRESHOLD {
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*c.local.use_lower_limit = true;
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} else if sensor_value < AIR_QUALITY_THRESHOLD_LOWER && *c.local.use_lower_limit {
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@ -237,12 +253,12 @@ mod app {
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AIR_QUALITY_THRESHOLD.. => RGB8::new(0, 255, 0),
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};
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c.shared.led.lock(|l| {
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l.write([color].iter().cloned()).unwrap();
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});
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if *c.local.led_color != color {
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c.local.led.write([color].iter().cloned()).unwrap();
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*c.local.led_color = color;
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}
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c.local.watchdog.feed();
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c.shared.alarm1.lock(|a| {
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c.shared.alarm2.lock(|a| {
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a.clear_interrupt();
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let _ = a.schedule(MicrosDurationU32::from_ticks(DISPLAY_UPDATE_INT_TICKS));
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});
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