Setup embassy, usb-serial and display drivers

This commit is contained in:
Sebastian 2022-08-18 23:46:01 +02:00
commit 7a4e4a89cb
6 changed files with 1586 additions and 0 deletions

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.cargo/config.toml Normal file
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[target.'cfg(all(target_arch = "arm", target_os = "none"))']
runner = "probe-run --chip STM32F103C8"
rustflags = [
"-C", "linker=flip-link",
"-C", "link-arg=-Tlink.x",
"-C", "link-arg=-Tdefmt.x",
# This is needed if your flash or ram addresses are not aligned to 0x10000 in memory.x
# See https://github.com/rust-embedded/cortex-m-quickstart/pull/95
"-C", "link-arg=--nmagic",
]
[build]
target = "thumbv7m-none-eabi" # Cortex-M3
[alias]
rb = "run --bin"
rrb = "run --release --bin"

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.gitignore vendored Normal file
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/target

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Cargo.lock generated Normal file

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Cargo.toml Normal file
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[package]
name = "rotor-control-stm32"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
embassy-util = { version = "0.1.0", git = "https://github.com/embassy-rs/embassy.git", features = ["defmt"] }
embassy-executor = { version = "0.1.0", git = "https://github.com/embassy-rs/embassy.git", features = ["defmt", "integrated-timers"] }
embassy-time = { version = "0.1.0", git = "https://github.com/embassy-rs/embassy.git", features = ["defmt", "defmt-timestamp-uptime", "tick-32768hz"] }
embassy-stm32 = { version = "0.1.0", git = "https://github.com/embassy-rs/embassy.git", features = ["nightly", "defmt", "stm32f103c8", "unstable-pac", "memory-x", "time-driver-any"] }
embassy-usb = { version = "0.1.0", git = "https://github.com/embassy-rs/embassy.git", features = ["defmt"] }
embassy-usb-serial = { version = "0.1.0", git = "https://github.com/embassy-rs/embassy.git", features = ["defmt"] }
defmt = "0.3.2"
defmt-rtt = "0.3.2"
panic-probe = { version = "0.3.0"}
cortex-m = { version = "0.7.6", features = ["critical-section-single-core"] }
cortex-m-rt = "0.7.0"
embedded-hal = "0.2.6"
futures = { version = "0.3.17", default-features = false, features = ["async-await"] }
heapless = { version = "0.7.5", default-features = false }
nb = "1.0.0"
ssd1306 = "0.7.1"
embedded-graphics = "0.7.1"
profont = "0.6.1"
arrayvec = { version = "0.7.2", default-features = false}
[profile.dev]
opt-level = "s"

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memory.x Normal file
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/* Linker script for the STM32F103C8T6 */
MEMORY
{
FLASH : ORIGIN = 0x08000000, LENGTH = 64K
RAM : ORIGIN = 0x20000000, LENGTH = 20K
}

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use core::fmt::Write;
use defmt::panic;
use defmt_rtt as _;
use panic_probe as _;
use embassy_executor::Spawner;
use embassy_stm32::gpio::{Level, Output, Speed};
use embassy_stm32::time::Hertz;
use embassy_stm32::usb::{Driver, Instance};
use embassy_stm32::{i2c, interrupt, Config};
use embassy_time::{Duration, Instant, Timer};
use embassy_usb::driver::EndpointError;
use embassy_usb::Builder;
use embassy_usb_serial::{CdcAcmClass, State};
use futures::future::join;
use embedded_graphics::{
mono_font::MonoTextStyle, pixelcolor::BinaryColor, prelude::*, text::Text,
};
use profont::PROFONT_12_POINT;
use ssd1306::{prelude::*, I2CDisplayInterface, Ssd1306};
use arrayvec::ArrayString;
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let mut config = Config::default();
config.rcc.hse = Some(Hertz(8_000_000));
config.rcc.sys_ck = Some(Hertz(48_000_000));
config.rcc.pclk1 = Some(Hertz(24_000_000));
let mut p = embassy_stm32::init(config);
defmt::info!("Startup");
{
// BluePill board has a pull-up resistor on the D+ line.
// Pull the D+ pin down to send a RESET condition to the USB bus.
// This forced reset is needed only for development, without it host
// will not reset your device when you upload new firmware.
let _dp = Output::new(&mut p.PA12, Level::Low, Speed::Low);
Timer::after(Duration::from_millis(10)).await;
}
// Create the driver, from the HAL.
let irq = interrupt::take!(USB_LP_CAN1_RX0);
let driver = Driver::new(p.USB, irq, p.PA12, p.PA11);
// Create embassy-usb Config
let config = embassy_usb::Config::new(0xc0de, 0xcafe);
//config.max_packet_size_0 = 64;
// Create embassy-usb DeviceBuilder using the driver and config.
// It needs some buffers for building the descriptors.
let mut device_descriptor = [0; 256];
let mut config_descriptor = [0; 256];
let mut bos_descriptor = [0; 256];
let mut control_buf = [0; 7];
let mut state = State::new();
let mut builder = Builder::new(
driver,
config,
&mut device_descriptor,
&mut config_descriptor,
&mut bos_descriptor,
&mut control_buf,
None,
);
// Create classes on the builder.
let mut class = CdcAcmClass::new(&mut builder, &mut state, 64);
// Build the builder.
let mut usb = builder.build();
// Run the USB device.
let usb_fut = usb.run();
let i2c = i2c::I2c::new(
p.I2C1,
p.PB6,
p.PB7,
Hertz::hz(100_000),
i2c::Config::default(),
);
let interface = I2CDisplayInterface::new(i2c);
let display_fut = async {
let mut display = Ssd1306::new(interface, DisplaySize128x32, DisplayRotation::Rotate0)
.into_buffered_graphics_mode();
display.init().unwrap();
let text_style = MonoTextStyle::new(&PROFONT_12_POINT, BinaryColor::On);
loop {
display.clear();
Text::new("Hello world", Point::new(0, 7), text_style)
.draw(&mut display)
.unwrap();
let now = Instant::now().as_millis();
let mut buf = ArrayString::<20>::new();
write!(&mut buf, "{}", now).expect("Can't write");
Text::new(&buf, Point::new(0, 20), text_style)
.draw(&mut display)
.unwrap();
display.flush().unwrap();
Timer::after(Duration::from_millis(500)).await;
}
};
// Do stuff with the class!
let echo_fut = async {
loop {
class.wait_connection().await;
defmt::info!("Connected");
let _ = echo(&mut class).await;
defmt::info!("Disconnected");
}
};
// Run everything concurrently.
// If we had made everything `'static` above instead, we could do this using separate tasks instead.
join(join(usb_fut, display_fut), echo_fut).await;
}
struct Disconnected {}
impl From<EndpointError> for Disconnected {
fn from(val: EndpointError) -> Self {
match val {
EndpointError::BufferOverflow => panic!("Buffer overflow"),
EndpointError::Disabled => Disconnected {},
}
}
}
async fn echo<'d, T: Instance + 'd>(
class: &mut CdcAcmClass<'d, Driver<'d, T>>,
) -> Result<(), Disconnected> {
let mut buf = [0; 64];
loop {
let n = class.read_packet(&mut buf).await?;
let data = &buf[..n];
defmt::info!("data: {:x}", data);
class.write_packet(">".as_bytes()).await?;
class.write_packet(data).await?;
class.write_packet("\n".as_bytes()).await?;
}
}