From cf3c021c3745c3f555b650f019fd8b1d4982443b Mon Sep 17 00:00:00 2001 From: Bob McWhirter Date: Tue, 8 Jun 2021 10:36:47 -0400 Subject: [PATCH] Initial examples for STM32L4+ --- examples/stm32l4/.cargo/config.toml | 21 +++++++ examples/stm32l4/memory.x | 4 +- examples/stm32l4/src/bin/button.rs | 58 +++++++++++++++++ examples/stm32l4/src/bin/button_exti.rs | 84 +++++++++++++++++++++++++ examples/stm32l4/src/bin/spi.rs | 65 +++++++++++++++++++ 5 files changed, 230 insertions(+), 2 deletions(-) create mode 100644 examples/stm32l4/.cargo/config.toml create mode 100644 examples/stm32l4/src/bin/button.rs create mode 100644 examples/stm32l4/src/bin/button_exti.rs create mode 100644 examples/stm32l4/src/bin/spi.rs diff --git a/examples/stm32l4/.cargo/config.toml b/examples/stm32l4/.cargo/config.toml new file mode 100644 index 00000000..19ea6f56 --- /dev/null +++ b/examples/stm32l4/.cargo/config.toml @@ -0,0 +1,21 @@ +[unstable] +build-std = ["core"] + +[target.'cfg(all(target_arch = "arm", target_os = "none"))'] +# replace STM32F429ZITx with your chip as listed in `probe-run --list-chips` +runner = "probe-run --chip STM32L4S5VI" + +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 = "thumbv7em-none-eabi" diff --git a/examples/stm32l4/memory.x b/examples/stm32l4/memory.x index 22618dfb..eb87d1b5 100644 --- a/examples/stm32l4/memory.x +++ b/examples/stm32l4/memory.x @@ -2,6 +2,6 @@ MEMORY { /* NOTE 1 K = 1 KiBi = 1024 bytes */ /* These values correspond to the STM32L4S5 */ - FLASH : ORIGIN = 0x08000000, LENGTH = 2048K - RAM : ORIGIN = 0x20000000, LENGTH = 640K + FLASH : ORIGIN = 0x08000000, LENGTH = 1024K + RAM : ORIGIN = 0x20000000, LENGTH = 128K } diff --git a/examples/stm32l4/src/bin/button.rs b/examples/stm32l4/src/bin/button.rs new file mode 100644 index 00000000..43d81715 --- /dev/null +++ b/examples/stm32l4/src/bin/button.rs @@ -0,0 +1,58 @@ +#![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::{Input, Level, Output, Pull}; +use embedded_hal::digital::v2::{InputPin, OutputPin}; +use example_common::*; + +use cortex_m_rt::entry; +use stm32l4::stm32l4x5 as pac; + + +#[entry] +fn main() -> ! { + info!("Hello World!"); + + let pp = pac::Peripherals::take().unwrap(); + + pp.DBGMCU.cr.modify(|_, w| { + w.dbg_sleep().set_bit(); + w.dbg_standby().set_bit(); + w.dbg_stop().set_bit() + }); + + pp.RCC.ahb2enr.modify(|_, w| { + w.gpioaen().set_bit(); + w.gpioben().set_bit(); + w.gpiocen().set_bit(); + w.gpioden().set_bit(); + w.gpioeen().set_bit(); + w.gpiofen().set_bit(); + w + }); + + let p = embassy_stm32::init(Default::default()); + + let button = Input::new(p.PC13, Pull::Up); + let mut led1 = Output::new(p.PA5, Level::High); + let mut led2 = Output::new(p.PB14, 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(); + } + } +} diff --git a/examples/stm32l4/src/bin/button_exti.rs b/examples/stm32l4/src/bin/button_exti.rs new file mode 100644 index 00000000..caace835 --- /dev/null +++ b/examples/stm32l4/src/bin/button_exti.rs @@ -0,0 +1,84 @@ +#![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_traits::gpio::{WaitForFallingEdge, WaitForRisingEdge}; +use example_common::*; + +use cortex_m_rt::entry; +use stm32l4::stm32l4x5 as pac; + +#[embassy::task] +async fn main_task() { + let p = embassy_stm32::init(Default::default()); + + let button = Input::new(p.PC13, Pull::Up); + let mut button = ExtiInput::new(button, p.EXTI13); + + 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 = Forever::new(); + +#[entry] +fn main() -> ! { + info!("Hello World!"); + + let pp = pac::Peripherals::take().unwrap(); + + pp.DBGMCU.cr.modify(|_, w| { + w.dbg_sleep().set_bit(); + w.dbg_standby().set_bit(); + w.dbg_stop().set_bit() + }); + + pp.RCC.ahb2enr.modify(|_, w| { + w.gpioaen().set_bit(); + w.gpioben().set_bit(); + w.gpiocen().set_bit(); + w.gpioden().set_bit(); + w.gpioeen().set_bit(); + w.gpiofen().set_bit(); + w + }); + + pp.RCC.apb2enr.modify(|_, w| { + w.syscfgen().set_bit(); + w + }); + + unsafe { embassy::time::set_clock(&ZeroClock) }; + + let executor = EXECUTOR.put(Executor::new()); + + executor.run(|spawner| { + unwrap!(spawner.spawn(main_task())); + }) + +} diff --git a/examples/stm32l4/src/bin/spi.rs b/examples/stm32l4/src/bin/spi.rs new file mode 100644 index 00000000..9db854dc --- /dev/null +++ b/examples/stm32l4/src/bin/spi.rs @@ -0,0 +1,65 @@ +#![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::spi::{Config, Spi}; +use embassy_stm32::time::Hertz; +use embedded_hal::blocking::spi::Transfer; +use stm32l4::stm32l4x5 as pac; + +#[entry] +fn main() -> ! { + info!("Hello World, dude!"); + + let pp = pac::Peripherals::take().unwrap(); + + pp.DBGMCU.cr.modify(|_, w| { + w.dbg_sleep().set_bit(); + w.dbg_standby().set_bit(); + w.dbg_stop().set_bit() + }); + + pp.RCC.ahb2enr.modify(|_, w| { + w.gpioaen().set_bit(); + w.gpioben().set_bit(); + w.gpiocen().set_bit(); + w.gpioden().set_bit(); + w.gpioeen().set_bit(); + w.gpiofen().set_bit(); + w + }); + + let p = embassy_stm32::init(Default::default()); + + let mut spi = Spi::new( + Hertz(16_000_000), + p.SPI3, + p.PC10, + p.PC12, + p.PC11, + Hertz(1_000_000), + Config::default(), + ); + + let mut cs = Output::new(p.PE0, 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); + } +}