Add some miscellaneous examples for the ESP32-H2 (#548)

* Add some miscellaneous examples for the ESP32-H2

* Update the CHANGELOG

.github/workflows/ci.yml

@@ -224,10 +224,10 @@ jobs:
         run: cd esp32h2-hal/ && cargo +nightly check --examples --features=eh1,ufmt
       - name: check esp32h2-hal (async, i2c)
         run: cd esp32h2-hal/ && cargo check --example=embassy_i2c --features=embassy,embassy-time-systick,async
-      # - name: check esp32h2-hal (async, systick)
+      - name: check esp32h2-hal (async, systick)
-      #   run: cd esp32h2-hal/ && cargo +nightly check --example=embassy_hello_world --features=embassy,embassy-time-systick
+        run: cd esp32h2-hal/ && cargo +nightly check --example=embassy_hello_world --features=embassy,embassy-time-systick
-      # - name: check esp32h2-hal (async, timg0)
+      - name: check esp32h2-hal (async, timg0)
-      #   run: cd esp32h2-hal/ && cargo +nightly check --example=embassy_hello_world --features=embassy,embassy-time-timg0
+        run: cd esp32h2-hal/ && cargo +nightly check --example=embassy_hello_world --features=embassy,embassy-time-timg0
       # - name: check esp32h2-hal (async, gpio)
       #   run: cd esp32h2-hal/ && cargo +nightly check --example=embassy_wait --features=embassy,embassy-time-systick,async
       # - name: check esp32h2-hal (async, spi)
@@ -440,7 +440,7 @@ jobs:
         uses: dangoslen/changelog-enforcer@v3
         with:
           changeLogPath: CHANGELOG.md
-          skipLabels: 'skip-changelog'
+          skipLabels: "skip-changelog"
-          missingUpdateErrorMessage: 'Please add a changelog entry in the CHANGELOG.md file.'
+          missingUpdateErrorMessage: "Please add a changelog entry in the CHANGELOG.md file."
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

CHANGELOG.md

@@ -24,6 +24,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add LEDC hardware fade support
 - Added support for multicore async GPIO (#542)
 - Add initial support for MCPWM in ESP32-H2 (#544)
+- Add some miscellaneous examples for the ESP32-H2 (#548)
 
 ### Fixed
 
@@ -34,6 +35,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - ESP32-S3: Move PSRAM related function to RAM (#546)
 
 ### Changed
+
 - Improve examples documentation (#533)
 
 ### Breaking

esp-hal-common/Cargo.toml

@@ -55,7 +55,7 @@ esp32   = { version = "0.23.0", features = ["critical-section"], optional = true
 esp32c2 = { version = "0.11.0", features = ["critical-section"], optional = true }
 esp32c3 = { version = "0.14.0", features = ["critical-section"], optional = true }
 esp32c6 = { version = "0.4.0",  features = ["critical-section"], optional = true }
-esp32h2 = { git = "https://github.com/esp-rs/esp-pacs", rev = "5828519", package = "esp32h2", features = ["critical-section"], optional = true }
+esp32h2 = { git = "https://github.com/esp-rs/esp-pacs", rev = "ff70333", package = "esp32h2", features = ["critical-section"], optional = true }
 esp32s2 = { version = "0.14.0", features = ["critical-section"], optional = true }
 esp32s3 = { version = "0.18.0", features = ["critical-section"], optional = true }
 

esp-hal-common/devices/esp32h2.toml

@@ -56,7 +56,7 @@ peripherals = [
     "uart0",
     "uart1",
     # "uhci0",
-    # "usb_device",
+    "usb_device",
 
     # Additional peripherals defined by us (the developers):
     "adc",

esp-hal-common/src/soc/esp32h2/peripherals.rs

@@ -58,6 +58,6 @@ crate::peripherals! {
     UART0 => true,
     UART1 => true,
     // UHCI0 => true,
-    // USB_DEVICE => true,
+    USB_DEVICE => true,
     RADIO => false,
 }

esp-hal-common/src/systimer.rs

@@ -138,7 +138,7 @@ impl<T, const CHANNEL: u8> Alarm<T, CHANNEL> {
             #[cfg(esp32s2)]
             systimer.step.write(|w| w.timer_xtal_step().bits(0x1)); // run at XTAL freq, not 80 * XTAL freq
 
-            #[cfg(any(esp32c2, esp32c3, esp32c6, esp32s3))]
+            #[cfg(any(esp32c2, esp32c3, esp32c6, esp32h2, esp32s3))]
             {
                 tconf.write(|w| w.target0_timer_unit_sel().clear_bit()); // default, use unit 0
                 systimer
@@ -148,7 +148,7 @@ impl<T, const CHANNEL: u8> Alarm<T, CHANNEL> {
 
             conf(tconf, hi, lo);
 
-            #[cfg(any(esp32c2, esp32c3, esp32c6, esp32s3))]
+            #[cfg(any(esp32c2, esp32c3, esp32c6, esp32h2, esp32s3))]
             {
                 match CHANNEL {
                     0 => {

esp32h2-hal/Cargo.toml

@@ -61,6 +61,10 @@ embassy              = ["esp-hal-common/embassy"]
 embassy-time-systick = ["esp-hal-common/embassy-time-systick", "embassy-time/tick-hz-16_000_000"]
 embassy-time-timg0   = ["esp-hal-common/embassy-time-timg0",   "embassy-time/tick-hz-1_000_000"]
 
+[[example]]
+name              = "embassy_hello_world"
+required-features = ["embassy"]
+
 [[example]]
 name              = "embassy_i2c"
 required-features = ["embassy", "async", "embassy-time-systick"]

esp32h2-hal/examples/advanced_serial.rs

@@ -0,0 +1,89 @@
+//! This shows how to configure UART
+//! You can short the TX and RX pin and see it reads what was written.
+//! Additionally you can connect a logic analzyer to TX and see how the changes
+//! of the configuration change the output signal.
+
+#![no_std]
+#![no_main]
+
+use esp32h2_hal::{
+    clock::ClockControl,
+    peripherals::Peripherals,
+    prelude::*,
+    timer::TimerGroup,
+    uart::{
+        config::{Config, DataBits, Parity, StopBits},
+        TxRxPins,
+    },
+    Rtc,
+    Uart,
+    IO,
+};
+use esp_backtrace as _;
+use esp_println::println;
+use nb::block;
+
+#[entry]
+fn main() -> ! {
+    let peripherals = Peripherals::take();
+    let mut system = peripherals.PCR.split();
+    let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
+
+    // Disable the watchdog timers. For the ESP32-H2, this includes the Super WDT,
+    // and the TIMG WDTs.
+    let mut rtc = Rtc::new(peripherals.LP_CLKRST);
+    let timer_group0 = TimerGroup::new(
+        peripherals.TIMG0,
+        &clocks,
+        &mut system.peripheral_clock_control,
+    );
+    let mut timer0 = timer_group0.timer0;
+    let mut wdt0 = timer_group0.wdt;
+    let timer_group1 = TimerGroup::new(
+        peripherals.TIMG1,
+        &clocks,
+        &mut system.peripheral_clock_control,
+    );
+    let mut wdt1 = timer_group1.wdt;
+
+    rtc.swd.disable();
+    rtc.rwdt.disable();
+    wdt0.disable();
+    wdt1.disable();
+
+    let config = Config {
+        baudrate: 115200,
+        data_bits: DataBits::DataBits8,
+        parity: Parity::ParityNone,
+        stop_bits: StopBits::STOP1,
+    };
+
+    let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
+    let pins = TxRxPins::new_tx_rx(
+        io.pins.gpio1.into_push_pull_output(),
+        io.pins.gpio2.into_floating_input(),
+    );
+
+    let mut serial1 = Uart::new_with_config(
+        peripherals.UART1,
+        Some(config),
+        Some(pins),
+        &clocks,
+        &mut system.peripheral_clock_control,
+    );
+
+    timer0.start(250u64.millis());
+
+    println!("Start");
+    loop {
+        serial1.write(0x42).ok();
+        let read = block!(serial1.read());
+
+        match read {
+            Ok(read) => println!("Read {:02x}", read),
+            Err(err) => println!("Error {:?}", err),
+        }
+
+        block!(timer0.wait()).unwrap();
+    }
+}

esp32h2-hal/examples/embassy_hello_world.rs

@@ -0,0 +1,82 @@
+//! embassy hello world
+//!
+//! This is an example of running the embassy executor with multiple tasks
+//! concurrently.
+
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use embassy_executor::Executor;
+use embassy_time::{Duration, Timer};
+use esp32h2_hal::{
+    clock::ClockControl,
+    embassy,
+    peripherals::Peripherals,
+    prelude::*,
+    timer::TimerGroup,
+    Rtc,
+};
+use esp_backtrace as _;
+use static_cell::StaticCell;
+
+#[embassy_executor::task]
+async fn run1() {
+    loop {
+        esp_println::println!("Hello world from embassy using esp-hal-async!");
+        Timer::after(Duration::from_millis(1_000)).await;
+    }
+}
+
+#[embassy_executor::task]
+async fn run2() {
+    loop {
+        esp_println::println!("Bing!");
+        Timer::after(Duration::from_millis(5_000)).await;
+    }
+}
+
+static EXECUTOR: StaticCell<Executor> = StaticCell::new();
+
+#[entry]
+fn main() -> ! {
+    esp_println::println!("Init!");
+    let peripherals = Peripherals::take();
+    let mut system = peripherals.PCR.split();
+    let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
+
+    let mut rtc = Rtc::new(peripherals.LP_CLKRST);
+    let timer_group0 = TimerGroup::new(
+        peripherals.TIMG0,
+        &clocks,
+        &mut system.peripheral_clock_control,
+    );
+    let mut wdt0 = timer_group0.wdt;
+    let timer_group1 = TimerGroup::new(
+        peripherals.TIMG1,
+        &clocks,
+        &mut system.peripheral_clock_control,
+    );
+    let mut wdt1 = timer_group1.wdt;
+
+    // Disable watchdog timers
+    rtc.swd.disable();
+    rtc.rwdt.disable();
+    wdt0.disable();
+    wdt1.disable();
+
+    #[cfg(feature = "embassy-time-systick")]
+    embassy::init(
+        &clocks,
+        esp32h2_hal::systimer::SystemTimer::new(peripherals.SYSTIMER),
+    );
+
+    #[cfg(feature = "embassy-time-timg0")]
+    embassy::init(&clocks, timer_group0.timer0);
+
+    let executor = EXECUTOR.init(Executor::new());
+    executor.run(|spawner| {
+        spawner.spawn(run1()).ok();
+        spawner.spawn(run2()).ok();
+    });
+}

esp32h2-hal/examples/systimer.rs

@@ -0,0 +1,138 @@
+//! This shows how to use the SYSTIMER peripheral including interrupts.
+//! It's an additional timer besides the TIMG peripherals.
+
+#![no_std]
+#![no_main]
+
+use core::cell::RefCell;
+
+use critical_section::Mutex;
+use esp32h2_hal::{
+    clock::ClockControl,
+    interrupt,
+    interrupt::Priority,
+    peripherals::{self, Peripherals},
+    prelude::*,
+    systimer::{Alarm, Periodic, SystemTimer, Target},
+    timer::TimerGroup,
+    Delay,
+    Rtc,
+};
+use esp_backtrace as _;
+use esp_println::println;
+
+static ALARM0: Mutex<RefCell<Option<Alarm<Periodic, 0>>>> = Mutex::new(RefCell::new(None));
+static ALARM1: Mutex<RefCell<Option<Alarm<Target, 1>>>> = Mutex::new(RefCell::new(None));
+static ALARM2: Mutex<RefCell<Option<Alarm<Target, 2>>>> = Mutex::new(RefCell::new(None));
+
+#[entry]
+fn main() -> ! {
+    let peripherals = Peripherals::take();
+    let mut system = peripherals.PCR.split();
+    let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
+
+    // Disable the watchdog timers. For the ESP32-H2, this includes the Super WDT,
+    // and the TIMG WDTs.
+    let mut rtc = Rtc::new(peripherals.LP_CLKRST);
+    let timer_group0 = TimerGroup::new(
+        peripherals.TIMG0,
+        &clocks,
+        &mut system.peripheral_clock_control,
+    );
+    let mut wdt0 = timer_group0.wdt;
+    let timer_group1 = TimerGroup::new(
+        peripherals.TIMG1,
+        &clocks,
+        &mut system.peripheral_clock_control,
+    );
+    let mut wdt1 = timer_group1.wdt;
+
+    // Disable watchdog timers
+    rtc.swd.disable();
+    rtc.rwdt.disable();
+    wdt0.disable();
+    wdt1.disable();
+
+    let syst = SystemTimer::new(peripherals.SYSTIMER);
+
+    println!("SYSTIMER Current value = {}", SystemTimer::now());
+
+    let alarm0 = syst.alarm0.into_periodic();
+    alarm0.set_period(1u32.Hz());
+    alarm0.clear_interrupt();
+    alarm0.interrupt_enable(true);
+
+    let alarm1 = syst.alarm1;
+    alarm1.set_target(SystemTimer::now() + (SystemTimer::TICKS_PER_SECOND * 2));
+    alarm1.interrupt_enable(true);
+
+    let alarm2 = syst.alarm2;
+    alarm2.set_target(SystemTimer::now() + (SystemTimer::TICKS_PER_SECOND * 3));
+    alarm2.interrupt_enable(true);
+
+    critical_section::with(|cs| {
+        ALARM0.borrow_ref_mut(cs).replace(alarm0);
+        ALARM1.borrow_ref_mut(cs).replace(alarm1);
+        ALARM2.borrow_ref_mut(cs).replace(alarm2);
+    });
+
+    interrupt::enable(
+        peripherals::Interrupt::SYSTIMER_TARGET0,
+        Priority::Priority1,
+    )
+    .unwrap();
+    interrupt::enable(
+        peripherals::Interrupt::SYSTIMER_TARGET1,
+        Priority::Priority2,
+    )
+    .unwrap();
+    interrupt::enable(
+        peripherals::Interrupt::SYSTIMER_TARGET2,
+        Priority::Priority2,
+    )
+    .unwrap();
+
+    // Initialize the Delay peripheral, and use it to toggle the LED state in a
+    // loop.
+    let mut delay = Delay::new(&clocks);
+
+    loop {
+        delay.delay_ms(10000u32);
+    }
+}
+
+#[interrupt]
+fn SYSTIMER_TARGET0() {
+    println!("Interrupt lvl1 (alarm0)");
+    critical_section::with(|cs| {
+        ALARM0
+            .borrow_ref_mut(cs)
+            .as_mut()
+            .unwrap()
+            .clear_interrupt()
+    });
+}
+
+#[interrupt]
+fn SYSTIMER_TARGET1() {
+    println!("Interrupt lvl2 (alarm1)");
+    critical_section::with(|cs| {
+        ALARM1
+            .borrow_ref_mut(cs)
+            .as_mut()
+            .unwrap()
+            .clear_interrupt()
+    });
+}
+
+#[interrupt]
+fn SYSTIMER_TARGET2() {
+    println!("Interrupt lvl2 (alarm2)");
+    critical_section::with(|cs| {
+        ALARM2
+            .borrow_ref_mut(cs)
+            .as_mut()
+            .unwrap()
+            .clear_interrupt()
+    });
+}

esp32h2-hal/examples/usb_serial_jtag.rs

@@ -0,0 +1,99 @@
+//! This shows how to output text via USB Serial/JTAG.
+//! You need to connect via the Serial/JTAG interface to see any output.
+//! Most dev-kits use a USB-UART-bridge - in that case you won't see any output.
+
+#![no_std]
+#![no_main]
+
+use core::{cell::RefCell, fmt::Write};
+
+use critical_section::Mutex;
+use esp32h2_hal::{
+    clock::ClockControl,
+    interrupt,
+    peripherals::{self, Peripherals},
+    prelude::*,
+    riscv,
+    timer::TimerGroup,
+    Cpu,
+    Rtc,
+    UsbSerialJtag,
+};
+use esp_backtrace as _;
+use nb::block;
+
+static USB_SERIAL: Mutex<RefCell<Option<UsbSerialJtag>>> = Mutex::new(RefCell::new(None));
+
+#[entry]
+fn main() -> ! {
+    let peripherals = Peripherals::take();
+    let mut system = peripherals.PCR.split();
+    let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
+
+    let mut rtc = Rtc::new(peripherals.LP_CLKRST);
+    let timer_group0 = TimerGroup::new(
+        peripherals.TIMG0,
+        &clocks,
+        &mut system.peripheral_clock_control,
+    );
+    let mut timer0 = timer_group0.timer0;
+    let mut wdt0 = timer_group0.wdt;
+    let timer_group1 = TimerGroup::new(
+        peripherals.TIMG1,
+        &clocks,
+        &mut system.peripheral_clock_control,
+    );
+    let mut wdt1 = timer_group1.wdt;
+
+    // Disable watchdog timers
+    rtc.swd.disable();
+    rtc.rwdt.disable();
+    wdt0.disable();
+    wdt1.disable();
+
+    let mut usb_serial =
+        UsbSerialJtag::new(peripherals.USB_DEVICE, &mut system.peripheral_clock_control);
+
+    usb_serial.listen_rx_packet_recv_interrupt();
+
+    timer0.start(1u64.secs());
+
+    critical_section::with(|cs| USB_SERIAL.borrow_ref_mut(cs).replace(usb_serial));
+
+    interrupt::enable(peripherals::Interrupt::USB, interrupt::Priority::Priority1).unwrap();
+
+    interrupt::set_kind(
+        Cpu::ProCpu,
+        interrupt::CpuInterrupt::Interrupt1,
+        interrupt::InterruptKind::Edge,
+    );
+
+    unsafe {
+        riscv::interrupt::enable();
+    }
+
+    loop {
+        critical_section::with(|cs| {
+            writeln!(
+                USB_SERIAL.borrow_ref_mut(cs).as_mut().unwrap(),
+                "Hello world!"
+            )
+            .ok();
+        });
+
+        block!(timer0.wait()).unwrap();
+    }
+}
+
+#[interrupt]
+fn USB() {
+    critical_section::with(|cs| {
+        let mut usb_serial = USB_SERIAL.borrow_ref_mut(cs);
+        let usb_serial = usb_serial.as_mut().unwrap();
+        writeln!(usb_serial, "USB serial interrupt").unwrap();
+        while let nb::Result::Ok(c) = usb_serial.read_byte() {
+            writeln!(usb_serial, "Read byte: {:02x}", c).unwrap();
+        }
+        usb_serial.reset_rx_packet_recv_interrupt();
+    });
+}