Port example to RTFM version 0.5
See https://rtfm.rs/0.5/book/en/migration.html for the migration guide. Additional changes: * Turned all resources into snake case (as they are struct fields now) * Set up and enable the cycle counter (CYCCNT) for scheduling
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@ -16,8 +16,7 @@ heapless = "0.4.2"
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panic-semihosting = "0.5.1"
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[dependencies.cortex-m-rtfm]
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version = "0.4.2"
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features = ["timer-queue"]
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version = "0.5.0"
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[dependencies.hal]
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package = "stm32f4xx-hal"
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161
src/main.rs
161
src/main.rs
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@ -22,6 +22,7 @@ use heapless::{consts::U8, Vec};
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#[cfg(not(test))]
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use panic_semihosting as _;
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use rtfm::app;
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use rtfm::cyccnt::{Instant, U32Ext};
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use stm32f4disc_demo::led_ring::LedRing;
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type Accelerometer = hal::spi::Spi<SPI1, (Spi1Sck, Spi1Miso, Spi1Mosi)>;
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@ -37,23 +38,29 @@ type UserButton = hal::gpio::gpioa::PA0<Input<Floating>>;
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/// The number of cycles between LED ring updates (used by tasks).
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const PERIOD: u32 = 8_000_000;
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#[app(device = hal::stm32)]
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#[app(device = hal::stm32, monotonic = rtfm::cyccnt::CYCCNT, peripherals = true)]
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const APP: () = {
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static mut ACCEL: Accelerometer = ();
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static mut ACCEL_CS: AccelerometerCs = ();
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static mut BUFFER: Vec<u8, U8> = ();
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static mut BUTTON: UserButton = ();
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static mut EXTI_CNTR: EXTI = ();
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static mut LED_RING: LedRing<Led> = ();
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static mut SERIAL_RX: SerialRx = ();
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static mut SERIAL_TX: SerialTx = ();
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struct Resources {
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accel: Accelerometer,
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accel_cs: AccelerometerCs,
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buffer: Vec<u8, U8>,
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button: UserButton,
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exit_cntr: EXTI,
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led_ring: LedRing<Led>,
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serial_rx: SerialRx,
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serial_tx: SerialTx,
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}
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/// Initializes the application by setting up the LED ring, user button, serial
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/// interface and accelerometer.
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#[init(spawn = [accel_leds, cycle_leds])]
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fn init() -> init::LateResources {
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fn init(mut cx: init::Context) -> init::LateResources {
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// Set up and enable the monotonic timer.
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cx.core.DCB.enable_trace();
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cx.core.DWT.enable_cycle_counter();
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// Set up the LED ring and spawn the task corresponding to the mode.
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let gpiod = device.GPIOD.split();
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let gpiod = cx.device.GPIOD.split();
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let leds = [
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gpiod.pd12.into_push_pull_output().downgrade(),
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gpiod.pd13.into_push_pull_output().downgrade(),
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@ -62,14 +69,14 @@ const APP: () = {
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];
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let led_ring = LedRing::from(leds);
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if led_ring.is_mode_cycle() {
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spawn.cycle_leds().unwrap();
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cx.spawn.cycle_leds().unwrap();
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} else if led_ring.is_mode_accel() {
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spawn.accel_leds().unwrap();
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cx.spawn.accel_leds().unwrap();
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}
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// Set up the EXTI0 interrupt for the user button.
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let mut exti_cntr = device.EXTI;
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let gpioa = device.GPIOA.split();
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let mut exti_cntr = cx.device.EXTI;
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let gpioa = cx.device.GPIOA.split();
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let mut button = gpioa.pa0.into_floating_input();
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button.enable_interrupt(&mut exti_cntr);
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button.trigger_on_edge(&mut exti_cntr, Edge::RISING);
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@ -78,9 +85,9 @@ const APP: () = {
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let tx = gpioa.pa2.into_alternate_af7();
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let rx = gpioa.pa3.into_alternate_af7();
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let config = SerialConfig::default().baudrate(115_200.bps());
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let rcc = device.RCC.constrain();
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let rcc = cx.device.RCC.constrain();
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let clocks = rcc.cfgr.freeze();
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let mut serial = Serial::usart2(device.USART2, (tx, rx), config, clocks).unwrap();
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let mut serial = Serial::usart2(cx.device.USART2, (tx, rx), config, clocks).unwrap();
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serial.listen(serial::Event::Rxne);
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let (mut serial_tx, serial_rx) = serial.split();
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@ -95,9 +102,9 @@ const APP: () = {
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polarity: Polarity::IdleHigh,
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phase: Phase::CaptureOnSecondTransition,
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};
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let mut accel = Spi::spi1(device.SPI1, (sck, miso, mosi), mode, 100.hz(), clocks);
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let mut accel = Spi::spi1(cx.device.SPI1, (sck, miso, mosi), mode, 100.hz(), clocks);
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let gpioe = device.GPIOE.split();
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let gpioe = cx.device.GPIOE.split();
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let mut accel_cs = gpioe.pe3.into_push_pull_output();
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// Initialize the accelerometer.
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@ -109,125 +116,141 @@ const APP: () = {
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writeln!(serial_tx, "init\r").unwrap();
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init::LateResources {
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ACCEL: accel,
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ACCEL_CS: accel_cs,
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BUFFER: buffer,
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BUTTON: button,
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EXTI_CNTR: exti_cntr,
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LED_RING: led_ring,
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SERIAL_RX: serial_rx,
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SERIAL_TX: serial_tx,
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accel: accel,
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accel_cs: accel_cs,
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buffer: buffer,
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button: button,
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exit_cntr: exti_cntr,
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led_ring: led_ring,
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serial_rx: serial_rx,
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serial_tx: serial_tx,
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}
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}
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/// Task that advances the LED ring one step and schedules the next trigger (if enabled).
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#[task(schedule = [cycle_leds], resources = [LED_RING])]
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fn cycle_leds() {
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resources.LED_RING.lock(|led_ring| {
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#[task(schedule = [cycle_leds], resources = [led_ring])]
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fn cycle_leds(mut cx: cycle_leds::Context) {
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let reschedule = cx.resources.led_ring.lock(|led_ring| {
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if led_ring.is_mode_cycle() {
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led_ring.advance();
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schedule.cycle_leds(scheduled + PERIOD.cycles()).unwrap();
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true
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} else {
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false
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}
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});
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if reschedule {
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cx.schedule
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.cycle_leds(Instant::now() + PERIOD.cycles())
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.unwrap();
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}
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}
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/// Task that performs an accelerometers measurement and adjusts the LED ring accordingly
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/// and schedules the next trigger (if enabled).
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#[task(schedule = [accel_leds], resources = [ACCEL, ACCEL_CS, LED_RING, SERIAL_TX])]
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fn accel_leds() {
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resources.ACCEL_CS.set_low();
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#[task(schedule = [accel_leds], resources = [accel, accel_cs, led_ring, serial_tx])]
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fn accel_leds(mut cx: accel_leds::Context) {
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cx.resources.accel_cs.set_low();
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let read_command = (1 << 7) | (1 << 6) | 0x29;
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let mut commands = [read_command, 0x0, 0x0, 0x0];
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let result = resources.ACCEL.transfer(&mut commands[..]).unwrap();
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let result = cx.resources.accel.transfer(&mut commands[..]).unwrap();
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let acc_x = result[1] as i8;
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let acc_y = result[3] as i8;
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resources.ACCEL_CS.set_high();
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cx.resources.accel_cs.set_high();
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if acc_x == 0 && acc_y == 0 {
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resources
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.SERIAL_TX
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cx.resources
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.serial_tx
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.lock(|serial_tx| writeln!(serial_tx, "level\r").unwrap());
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}
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resources.LED_RING.lock(|led_ring| {
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let reschedule = cx.resources.led_ring.lock(|led_ring| {
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if led_ring.is_mode_accel() {
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let directions = [acc_y < 0, acc_x < 0, acc_y > 0, acc_x > 0];
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led_ring.specific_on(directions);
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schedule.accel_leds(scheduled + PERIOD.cycles()).unwrap();
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true
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} else {
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false
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}
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})
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});
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if reschedule {
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cx.schedule
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.accel_leds(Instant::now() + PERIOD.cycles())
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.unwrap();
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}
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}
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/// Interrupt handler that writes that the button is pressed to the serial interface
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/// and reverses the LED ring cycle direction.
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#[interrupt(binds = EXTI0, resources = [BUTTON, EXTI_CNTR, LED_RING, SERIAL_TX])]
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fn button_pressed() {
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resources.LED_RING.lock(|led_ring| led_ring.reverse());
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#[task(binds = EXTI0, resources = [button, exit_cntr, led_ring, serial_tx])]
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fn button_pressed(mut cx: button_pressed::Context) {
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cx.resources.led_ring.lock(|led_ring| led_ring.reverse());
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// Write the fact that the button has been pressed to the serial port.
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resources
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.SERIAL_TX
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cx.resources
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.serial_tx
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.lock(|serial_tx| writeln!(serial_tx, "button\r").unwrap());
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resources
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.BUTTON
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.clear_interrupt_pending_bit(resources.EXTI_CNTR);
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cx.resources
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.button
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.clear_interrupt_pending_bit(cx.resources.exit_cntr);
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}
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/// Interrupt handler that reads data from the serial connection and handles commands
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/// once an appropriate command is in the buffer.
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#[interrupt(
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#[task(
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binds = USART2,
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priority = 2,
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resources = [BUFFER, LED_RING, SERIAL_RX, SERIAL_TX],
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resources = [buffer, led_ring, serial_rx, serial_tx],
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spawn = [accel_leds, cycle_leds]
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)]
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fn handle_serial() {
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let buffer = resources.BUFFER;
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fn handle_serial(cx: handle_serial::Context) {
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let buffer = cx.resources.buffer;
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// Read a byte from the serial port and write it back.
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let byte = resources.SERIAL_RX.read().unwrap();
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block!(resources.SERIAL_TX.write(byte)).unwrap();
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let byte = cx.resources.serial_rx.read().unwrap();
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block!(cx.resources.serial_tx.write(byte)).unwrap();
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//hprintln!("serial: {}", byte).unwrap();
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// Handle the command in the buffer for newline or backspace, otherwise append to the
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// buffer.
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if byte == b'\r' {
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block!(resources.SERIAL_TX.write(b'\n')).unwrap();
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block!(cx.resources.serial_tx.write(b'\n')).unwrap();
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match &buffer[..] {
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b"flip" => {
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resources.LED_RING.reverse();
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cx.resources.led_ring.reverse();
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}
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b"stop" => {
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resources.LED_RING.disable();
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cx.resources.led_ring.disable();
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}
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b"cycle" => {
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resources.LED_RING.enable_cycle();
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spawn.cycle_leds().unwrap();
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cx.resources.led_ring.enable_cycle();
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cx.spawn.cycle_leds().unwrap();
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}
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b"accel" => {
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resources.LED_RING.enable_accel();
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spawn.accel_leds().unwrap();
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cx.resources.led_ring.enable_accel();
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cx.spawn.accel_leds().unwrap();
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}
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b"off" => {
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resources.LED_RING.disable();
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resources.LED_RING.all_off();
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cx.resources.led_ring.disable();
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cx.resources.led_ring.all_off();
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}
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b"on" => {
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resources.LED_RING.disable();
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resources.LED_RING.all_on();
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cx.resources.led_ring.disable();
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cx.resources.led_ring.all_on();
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}
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_ => {
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writeln!(resources.SERIAL_TX, "?\r").unwrap();
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writeln!(cx.resources.serial_tx, "?\r").unwrap();
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}
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}
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buffer.clear();
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} else if byte == 0x7F {
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buffer.pop();
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block!(resources.SERIAL_TX.write(b'\r')).unwrap();
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block!(cx.resources.serial_tx.write(b'\r')).unwrap();
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for byte in buffer {
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block!(resources.SERIAL_TX.write(*byte)).unwrap();
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block!(cx.resources.serial_tx.write(*byte)).unwrap();
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}
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} else {
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if buffer.push(byte).is_err() {
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