Need help getting embassy setup working

[gyzerok]

Hello everyone!

I am trying to get a project generated by esp-template working with embassy by looking into Cargo.toml and the examples in this repo. Currently I am stuck at getting hello world to run.

Can someone help me figure out what am I missingZ

Here is the error I am getting while trying to build:

  = note: rust-lld: error: undefined symbol: _embassy_time_schedule_wake
          >>> referenced by lib.rs:44 (src/lib.rs:44)
          >>>               embassy_time_queue_driver-0086165c97473b38.embassy_time_queue_driver.7c79af5ce243461e-cgu.0.rcgu.o:(embassy_time_queue_driver::schedule_wake::h1c40c0489591156e) in archive /Users/f.nezhivoi/Code/private/esp32-waterplant/target/riscv32imc-unknown-none-elf/debug/deps/libembassy_time_queue_driver-0086165c97473b38.rlib

Here is my Cargo.toml:

[package]
name = "esp32-waterplant"
version = "0.1.0"
edition = "2021"
license = "MIT OR Apache-2.0"

[dependencies]
esp-backtrace = { version = "0.11.0", features = [
    "esp32c3",
    "exception-handler",
    "panic-handler",
    "println",
] }
esp-hal = { version = "0.16.0", features = [ "esp32c3", "embassy", "embassy-time-timg0", "embassy-executor-thread", "async" ] }
esp-println = { version = "0.9.0", features = ["esp32c3", "log"] }
log = { version = "0.4.20" }
esp-alloc = { version = "0.3.0" }
embedded-svc = { version = "0.26.1", default-features = false }
embedded-io = "0.6.1"
embedded-hal-async = "1.0.0"
esp-wifi = { version = "0.4.0", features = [
    "esp32c3",
    "phy-enable-usb",
    "utils",
    "wifi-default",
] }
embassy-executor = { version = "0.5.0", features = ["nightly"] }
embassy-time = { version = "0.3.0" }
heapless = { version = "0.8.0", default-features = false }
static_cell = "2.0"

[profile.dev]
# Rust debug is too slow.
# For debug builds always builds with some optimization
opt-level = "s"

[profile.release]
codegen-units = 1 # LLVM can perform better optimizations using a single thread
debug = 2
debug-assertions = false
incremental = false
lto = 'fat'
opt-level = 's'
overflow-checks = false

And here is my current main.rs

#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]

extern crate alloc;
use core::mem::MaybeUninit;

use embassy_executor::Spawner;
use embassy_time::{Duration, Timer};
use esp_backtrace as _;
use esp_hal::{
    clock::ClockControl,
    embassy::{self},
    peripherals::Peripherals,
    prelude::*,
    timer::TimerGroup,
};

#[global_allocator]
static ALLOCATOR: esp_alloc::EspHeap = esp_alloc::EspHeap::empty();

fn init_heap() {
    const HEAP_SIZE: usize = 32 * 1024;
    static mut HEAP: MaybeUninit<[u8; HEAP_SIZE]> = MaybeUninit::uninit();

    unsafe {
        ALLOCATOR.init(HEAP.as_mut_ptr() as *mut u8, HEAP_SIZE);
    }
}

#[embassy_executor::task]
async fn run() {
    loop {
        esp_println::println!("Hello world from embassy using esp-hal-async!");
        Timer::after(Duration::from_millis(1_000)).await;
    }
}

#[main]
async fn main(spawner: Spawner) {
    init_heap();

    esp_println::println!("Init!");
    let peripherals = Peripherals::take();
    let system = peripherals.SYSTEM.split();
    let clocks = ClockControl::boot_defaults(system.clock_control).freeze();

    let timg0 = TimerGroup::new(peripherals.TIMG0, &clocks);
    embassy::init(&clocks, timg0);

    spawner.spawn(run()).ok();

    loop {
        esp_println::println!("Bing!");
        Timer::after(Duration::from_millis(5_000)).await;
    }
}

[yanshay]

I think I stumbled on this lately which lead me to #1087 .
I think eventually I added embassy-integrated-timers feature to my esp-hal, but I'm using esp32s3, so don't know if it's the same in your case.

[gyzerok]

Oh my, thats it! Thank you so much

[lattice0]

embassy-integrated-timer does not exist on the current esp-hal

[bugadani]

As embassy support was moved out of esp-hal (into esp-hal-embassy) I'd expect a lot more to be missing in esp-hal :) The feature you want has been renamed to integrated-timers that you can enable on esp-hal-embassy

[georgik]

@gyzerok Example of solution for the linker problem with esp-hal 0.22 is:

esp-hal-embassy  = { version = "0.5.0",  features = ["esp32c6", "integrated-timers"] }

The same problem occurs if the feature is not enabled.