Add examples for STM32L0

This commit is contained in:
Ulf Lilleengen 2021-06-09 15:22:52 +02:00 committed by Dario Nieuwenhuis
parent 3d16e922d5
commit 1bb7123156
11 changed files with 300 additions and 3 deletions

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@ -84,6 +84,8 @@ jobs:
target: thumbv7em-none-eabi
- package: examples/stm32h7
target: thumbv7em-none-eabi
- package: examples/stm32l0
target: thumbv6m-none-eabi
steps:
- uses: actions/checkout@v2

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@ -263,9 +263,7 @@ impl<'d> Rcc<'d> {
pub fn enable_debug_wfe(&mut self, _dbg: &mut peripherals::DBGMCU, enable_dma: bool) {
// NOTE(unsafe) We have exclusive access to the RCC and DBGMCU
unsafe {
if enable_dma {
pac::RCC.ahbenr().modify(|w| w.set_dmaen(true));
}
pac::RCC.ahbenr().modify(|w| w.set_dmaen(enable_dma));
pac::DBGMCU.cr().modify(|w| {
w.set_dbg_sleep(DbgSleep::ENABLED);

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@ -0,0 +1,21 @@
[unstable]
build-std = ["core"]
[target.'cfg(all(target_arch = "arm", target_os = "none"))']
# replace your chip as listed in `probe-run --list-chips`
runner = "probe-run --chip STM32L072CZ"
rustflags = [
# LLD (shipped with the Rust toolchain) is used as the default linker
"-C", "link-arg=--nmagic",
"-C", "link-arg=-Tlink.x",
"-C", "link-arg=-Tdefmt.x",
# Code-size optimizations.
"-Z", "trap-unreachable=no",
"-C", "inline-threshold=5",
"-C", "no-vectorize-loops",
]
[build]
target = "thumbv6m-none-eabi"

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@ -0,0 +1,34 @@
[package]
authors = ["Dario Nieuwenhuis <dirbaio@dirbaio.net>", "Ulf Lilleengen <ulf.lilleengen@gmail.com>"]
edition = "2018"
name = "embassy-stm32l0-examples"
version = "0.1.0"
resolver = "2"
[features]
default = [
"defmt-default",
]
defmt-default = []
defmt-trace = []
defmt-debug = []
defmt-info = []
defmt-warn = []
defmt-error = []
[dependencies]
embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt", "defmt-trace"] }
embassy-traits = { version = "0.1.0", path = "../../embassy-traits", features = ["defmt"] }
embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "defmt-trace", "stm32l072cz"] }
embassy-extras = {version = "0.1.0", path = "../../embassy-extras" }
defmt = "0.2.0"
defmt-rtt = "0.2.0"
cortex-m = "0.7.1"
cortex-m-rt = "0.6.14"
embedded-hal = { version = "0.2.4" }
panic-probe = { version = "0.2.0", features= ["print-defmt"] }
futures = { version = "0.3.8", default-features = false, features = ["async-await"] }
rtt-target = { version = "0.3", features = ["cortex-m"] }
heapless = { version = "0.7.1", default-features = false }

31
examples/stm32l0/build.rs Normal file
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@ -0,0 +1,31 @@
//! This build script copies the `memory.x` file from the crate root into
//! a directory where the linker can always find it at build time.
//! For many projects this is optional, as the linker always searches the
//! project root directory -- wherever `Cargo.toml` is. However, if you
//! are using a workspace or have a more complicated build setup, this
//! build script becomes required. Additionally, by requesting that
//! Cargo re-run the build script whenever `memory.x` is changed,
//! updating `memory.x` ensures a rebuild of the application with the
//! new memory settings.
use std::env;
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;
fn main() {
// Put `memory.x` in our output directory and ensure it's
// on the linker search path.
let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
File::create(out.join("memory.x"))
.unwrap()
.write_all(include_bytes!("memory.x"))
.unwrap();
println!("cargo:rustc-link-search={}", out.display());
// By default, Cargo will re-run a build script whenever
// any file in the project changes. By specifying `memory.x`
// here, we ensure the build script is only re-run when
// `memory.x` is changed.
println!("cargo:rerun-if-changed=memory.x");
}

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@ -0,0 +1,5 @@
MEMORY
{
FLASH : ORIGIN = 0x08000000, LENGTH = 192K
RAM : ORIGIN = 0x20000000, LENGTH = 20K
}

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@ -0,0 +1,36 @@
#![no_std]
#![no_main]
#![feature(trait_alias)]
#![feature(min_type_alias_impl_trait)]
#![feature(impl_trait_in_bindings)]
#![feature(type_alias_impl_trait)]
#![allow(incomplete_features)]
#[path = "../example_common.rs"]
mod example_common;
use embassy_stm32::{rcc::*, gpio::{Level, Output}};
use embedded_hal::digital::v2::OutputPin;
use example_common::*;
use cortex_m_rt::entry;
#[entry]
fn main() -> ! {
info!("Hello World!");
let mut p = embassy_stm32::init(Default::default());
Rcc::new(p.RCC).enable_debug_wfe(&mut p.DBGMCU, true);
let mut led = Output::new(p.PB5, Level::High);
loop {
info!("high");
led.set_high().unwrap();
cortex_m::asm::delay(1_000_000);
info!("low");
led.set_low().unwrap();
cortex_m::asm::delay(1_000_000);
}
}

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@ -0,0 +1,40 @@
#![no_std]
#![no_main]
#![feature(trait_alias)]
#![feature(min_type_alias_impl_trait)]
#![feature(impl_trait_in_bindings)]
#![feature(type_alias_impl_trait)]
#![allow(incomplete_features)]
#[path = "../example_common.rs"]
mod example_common;
use embassy_stm32::{rcc::*, gpio::{Input, Level, Output, Pull}};
use embedded_hal::digital::v2::{InputPin, OutputPin};
use example_common::*;
use cortex_m_rt::entry;
#[entry]
fn main() -> ! {
info!("Hello World!");
let mut p = embassy_stm32::init(Default::default());
Rcc::new(p.RCC).enable_debug_wfe(&mut p.DBGMCU, true);
let button = Input::new(p.PB2, Pull::Up);
let mut led1 = Output::new(p.PA5, Level::High);
let mut led2 = Output::new(p.PB5, Level::High);
loop {
if button.is_high().unwrap() {
info!("high");
led1.set_high().unwrap();
led2.set_low().unwrap();
} else {
info!("low");
led1.set_low().unwrap();
led2.set_high().unwrap();
}
}
}

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@ -0,0 +1,64 @@
#![no_std]
#![no_main]
#![feature(trait_alias)]
#![feature(min_type_alias_impl_trait)]
#![feature(impl_trait_in_bindings)]
#![feature(type_alias_impl_trait)]
#![allow(incomplete_features)]
#[path = "../example_common.rs"]
mod example_common;
use embassy::executor::Executor;
use embassy::time::Clock;
use embassy::util::Forever;
use embassy_stm32::exti::ExtiInput;
use embassy_stm32::gpio::{Input, Pull};
use embassy_stm32::rcc;
use embassy_traits::gpio::{WaitForFallingEdge, WaitForRisingEdge};
use example_common::*;
use cortex_m_rt::entry;
#[embassy::task]
async fn main_task() {
let mut p = embassy_stm32::init(Default::default());
let mut rcc = rcc::Rcc::new(p.RCC);
rcc.enable_debug_wfe(&mut p.DBGMCU, true);
// Enables SYSCFG
let _ = rcc.enable_hsi48(&mut p.SYSCFG, p.CRS);
let button = Input::new(p.PB2, Pull::Up);
let mut button = ExtiInput::new(button, p.EXTI2);
info!("Press the USER button...");
loop {
button.wait_for_falling_edge().await;
info!("Pressed!");
button.wait_for_rising_edge().await;
info!("Released!");
}
}
struct ZeroClock;
impl Clock for ZeroClock {
fn now(&self) -> u64 {
0
}
}
static EXECUTOR: Forever<Executor> = Forever::new();
#[entry]
fn main() -> ! {
info!("Hello World!");
unsafe { embassy::time::set_clock(&ZeroClock) };
let executor = EXECUTOR.put(Executor::new());
executor.run(|spawner| {
unwrap!(spawner.spawn(main_task()));
})
}

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@ -0,0 +1,49 @@
#![no_std]
#![no_main]
#![feature(trait_alias)]
#![feature(min_type_alias_impl_trait)]
#![feature(impl_trait_in_bindings)]
#![feature(type_alias_impl_trait)]
#![allow(incomplete_features)]
#[path = "../example_common.rs"]
mod example_common;
use embassy_stm32::gpio::{Level, Output};
use embedded_hal::digital::v2::OutputPin;
use example_common::*;
use cortex_m_rt::entry;
use embassy_stm32::rcc;
use embassy_stm32::spi::{Config, Spi};
use embassy_stm32::time::Hertz;
use embedded_hal::blocking::spi::Transfer;
#[entry]
fn main() -> ! {
info!("Hello World, dude!");
let mut p = embassy_stm32::init(Default::default());
let mut rcc = rcc::Rcc::new(p.RCC);
rcc.enable_debug_wfe(&mut p.DBGMCU, true);
let mut spi = Spi::new(
Hertz(16_000_000),
p.SPI1,
p.PB3,
p.PA7,
p.PA6,
Hertz(1_000_000),
Config::default(),
);
let mut cs = Output::new(p.PA15, Level::High);
loop {
let mut buf = [0x0A; 4];
unwrap!(cs.set_low());
unwrap!(spi.transfer(&mut buf));
unwrap!(cs.set_high());
info!("xfer {=[u8]:x}", buf);
}
}

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@ -0,0 +1,17 @@
#![macro_use]
use defmt_rtt as _; // global logger
use panic_probe as _;
pub use defmt::*;
use core::sync::atomic::{AtomicUsize, Ordering};
defmt::timestamp! {"{=u64}", {
static COUNT: AtomicUsize = AtomicUsize::new(0);
// NOTE(no-CAS) `timestamps` runs with interrupts disabled
let n = COUNT.load(Ordering::Relaxed);
COUNT.store(n + 1, Ordering::Relaxed);
n as u64
}
}