mirror of
https://github.com/embassy-rs/embassy.git
synced 2024-11-25 16:23:10 +00:00
112 lines
3.3 KiB
Rust
112 lines
3.3 KiB
Rust
#![no_std]
|
|
#![no_main]
|
|
|
|
use core::cell::RefCell;
|
|
|
|
use defmt::*;
|
|
use embassy_embedded_hal::shared_bus::blocking::i2c::I2cDevice;
|
|
use embassy_executor::Spawner;
|
|
use embassy_stm32::i2c::{self, I2c};
|
|
use embassy_stm32::mode::Async;
|
|
use embassy_stm32::time::Hertz;
|
|
use embassy_stm32::{bind_interrupts, peripherals};
|
|
use embassy_sync::blocking_mutex::NoopMutex;
|
|
use embassy_time::{Duration, Timer};
|
|
use static_cell::StaticCell;
|
|
use {defmt_rtt as _, panic_probe as _};
|
|
|
|
const TMP117_ADDR: u8 = 0x48;
|
|
const TMP117_TEMP_RESULT: u8 = 0x00;
|
|
|
|
const SHTC3_ADDR: u8 = 0x70;
|
|
const SHTC3_WAKEUP: [u8; 2] = [0x35, 0x17];
|
|
const SHTC3_MEASURE_RH_FIRST: [u8; 2] = [0x5c, 0x24];
|
|
const SHTC3_SLEEP: [u8; 2] = [0xb0, 0x98];
|
|
|
|
static I2C_BUS: StaticCell<NoopMutex<RefCell<I2c<'static, Async>>>> = StaticCell::new();
|
|
|
|
bind_interrupts!(struct Irqs {
|
|
I2C1_EV => i2c::EventInterruptHandler<peripherals::I2C1>;
|
|
I2C1_ER => i2c::ErrorInterruptHandler<peripherals::I2C1>;
|
|
});
|
|
|
|
#[embassy_executor::task]
|
|
async fn temperature(mut i2c: impl embedded_hal_1::i2c::I2c + 'static) {
|
|
let mut data = [0u8; 2];
|
|
|
|
loop {
|
|
match i2c.write_read(TMP117_ADDR, &[TMP117_TEMP_RESULT], &mut data) {
|
|
Ok(()) => {
|
|
let temp = f32::from(i16::from_be_bytes(data)) * 7.8125 / 1000.0;
|
|
info!("Temperature {}", temp);
|
|
}
|
|
Err(_) => error!("I2C Error"),
|
|
}
|
|
|
|
Timer::after(Duration::from_millis(1000)).await;
|
|
}
|
|
}
|
|
|
|
#[embassy_executor::task]
|
|
async fn humidity(mut i2c: impl embedded_hal_1::i2c::I2c + 'static) {
|
|
let mut data = [0u8; 6];
|
|
|
|
loop {
|
|
// Wakeup
|
|
match i2c.write(SHTC3_ADDR, &SHTC3_WAKEUP) {
|
|
Ok(()) => Timer::after(Duration::from_millis(20)).await,
|
|
Err(_) => error!("I2C Error"),
|
|
}
|
|
|
|
// Measurement
|
|
match i2c.write(SHTC3_ADDR, &SHTC3_MEASURE_RH_FIRST) {
|
|
Ok(()) => Timer::after(Duration::from_millis(5)).await,
|
|
Err(_) => error!("I2C Error"),
|
|
}
|
|
|
|
// Result
|
|
match i2c.read(SHTC3_ADDR, &mut data) {
|
|
Ok(()) => Timer::after(Duration::from_millis(5)).await,
|
|
Err(_) => error!("I2C Error"),
|
|
}
|
|
|
|
// Sleep
|
|
match i2c.write(SHTC3_ADDR, &SHTC3_SLEEP) {
|
|
Ok(()) => {
|
|
let (bytes, _) = data.split_at(core::mem::size_of::<i16>());
|
|
let rh = f32::from(u16::from_be_bytes(bytes.try_into().unwrap())) * 100.0 / 65536.0;
|
|
info!("Humidity: {}", rh);
|
|
}
|
|
Err(_) => error!("I2C Error"),
|
|
}
|
|
|
|
Timer::after(Duration::from_millis(1000)).await;
|
|
}
|
|
}
|
|
|
|
#[embassy_executor::main]
|
|
async fn main(spawner: Spawner) {
|
|
let p = embassy_stm32::init(Default::default());
|
|
|
|
let i2c = I2c::new(
|
|
p.I2C1,
|
|
p.PB8,
|
|
p.PB9,
|
|
Irqs,
|
|
p.DMA1_CH4,
|
|
p.DMA1_CH5,
|
|
Hertz(100_000),
|
|
Default::default(),
|
|
);
|
|
let i2c_bus = NoopMutex::new(RefCell::new(i2c));
|
|
let i2c_bus = I2C_BUS.init(i2c_bus);
|
|
|
|
// Device 1, using embedded-hal-async compatible driver for TMP117
|
|
let i2c_dev1 = I2cDevice::new(i2c_bus);
|
|
spawner.spawn(temperature(i2c_dev1)).unwrap();
|
|
|
|
// Device 2, using embedded-hal-async compatible driver for SHTC3
|
|
let i2c_dev2 = I2cDevice::new(i2c_bus);
|
|
spawner.spawn(humidity(i2c_dev2)).unwrap();
|
|
}
|