1 unstable release
new 0.1.0 | Oct 20, 2024 |
---|
#74 in #i2c-driver
126 downloads per month
9KB
rv3032
Quickstart
[!TIP] At the end you will see a link to the latest docs which you can view locally.
Build this by running:
./build.sh
[!NOTE]
You will need to configure your target MCU accordingly.
This example uses the stm32wle5cc
metapac configuration for the RAKwireless RAK3172 module.
#[embassy_executor::main]
async fn main(_spawner: Spawner) -> ! {
let mut config = Config::default();
{
use embassy_stm32::rcc::*;
config.rcc.hsi = true;
config.rcc.hse = None;
config.rcc.pll = Some(Pll {
source: PllSource::HSI,
prediv: PllPreDiv::DIV1, // PLLM
mul: PllMul::MUL21, // PLLN
divp: Some(PllPDiv::DIV2),
divq: Some(PllQDiv::DIV2), // PLLQ
divr: Some(PllRDiv::DIV7), // PLL1_R
});
config.rcc.sys = Sysclk::PLL1_R;
config.rcc.ahb_pre = AHBPrescaler::DIV1;
config.rcc.apb1_pre = APBPrescaler::DIV1;
config.rcc.apb2_pre = APBPrescaler::DIV1;
}
let p = embassy_stm32::init(config);
info!("Configure STM32 for Skynet(TM) AI bootup. Muwahahahahhaha!");
let i2c2_periph = p.I2C2;
let led2 = p.PA0;
let led2 = &mut gpio::Output::new(led2, gpio::Level::Low, gpio::Speed::Medium);
// RAK19007 board J12
// - pin 1: VCC 3V3
// - pin 2: GND
// - pin 3: SCL
// - pin 4: SDA
//
// RAK3172 Package (STM32wle5cc)
// https://docs.embassy.dev/embassy-stm32/git/stm32wle5cc/i2c/trait.SclPin.html
// https://docs.embassy.dev/embassy-stm32/git/stm32wle5cc/i2c/trait.SdaPin.html
let mut i2c = I2c::new_blocking(
i2c2_periph,
p.PA12, // scl
p.PA11, // sda
Hertz(400_000),
Default::default(),
);
let mut rv3032: Driver<i2c::I2c<'_, mode::Blocking>, SevenBitAddress> = Driver::new(i2c);
let mut data = Some(rv3032::ClockData::new());
// let mut data: Option<ClockData> = None;
if let Some(mut d) = data {
let now = DateTimeBuilder::new()
.year(CurrentYear::new(2024))
.month(Month::October)
.date(7)
.weekday(Weekday::Monday)
.hours(0)
.minutes(0)
.seconds(0)
.build();
d.set(&now);
// Uncomment below to update the time on the RTC clock chip;
// You can then comment this out to continue fetching the latest time.
// let _ = rv3032.update(rv3032::ClockData::new(), &Some(d)).unwrap();
}
info!("Starting loop()...");
loop {
pulse_heartbeat(
|_| {
// Connect to the RV3032 RTC and fetch the latest time.
if let Some(d) = data {
match rv3032.now(d) {
Ok(mut data) => {
let data = rv3032::prelude::LoggableClockData::new(data);
info!("{}", data)
}
Err(err) => match err {
rv3032::prelude::DriverError::I2c(err) => {
error!("Unknown I2C error: {:?}", err)
}
_ => error!("Cannot fetch latest from RTC: Unknown error!"),
},
}
} else {
error!("Clock data not provided!");
}
},
(),
led2,
)
.await;
}
}
pub async fn pulse_heartbeat<F>(f: F, callback: (), led: &mut gpio::Output<'_>)
where
F: FnOnce(()),
{
// trace!("Heartbeat pulse...");
led.set_high();
Timer::after_millis(800).await;
f(callback);
led.set_low();
Timer::after_millis(200).await;
}
You can also use a Raspberry Pi Pico (RP2040) to get started:
#[embassy_executor::main]
async fn main(spawner: Spawner) {
let mut p = embassy_rp::init(Default::default());
info!("Configure RP2040 for Skynet(TM) AI bootup. Muwahahahahhaha!");
let mut led = Output::new(p.PIN_25, Level::Low);
// I2C Setup
info!("Starting I2C Setup");
let sda = p.PIN_14; // Pico pin 16
let scl = p.PIN_15; // Pico pin 17
let mut i2c_config = I2cConfig::default();
i2c_config.frequency = 400_000;
let mut i2c = i2c::I2c::new_async(p.I2C1, scl, sda, Irqs, i2c_config);
info!("I2C Initialized");
// RV3032, default address 0x32h
let mut rv3032: Driver<i2c::I2c<'_, I2C1, i2c::Async>, SevenBitAddress> = Driver::new(i2c);
let mut data = Some(rv3032::ClockData::new());
// let mut data: Option<ClockData> = None;
if let Some(mut d) = data {
let now = DateTimeBuilder::new()
.year(CurrentYear::new(2024))
.month(Month::October)
.date(7)
.weekday(Weekday::Monday)
.hours(0)
.minutes(0)
.seconds(0)
.build();
d.set(&now);
// Uncomment below to update the time on the RTC clock chip;
// You can then comment this out to continue fetching the latest time.
// let _ = rv3032.update(rv3032::ClockData::new(), &Some(d)).unwrap();
}
// ...
}
Refer to the docs for details.
Minimum supported Rust version (MSRV)
This project is tested against rust stable
.
License
Licensed under either of Apache License Version 2.0 or The MIT License at your option.
🦀 ノ( º _ º ノ) - respect crables!
Copyright
Copyright © 2024, Michael de Silva
Dependencies
~0.5–1MB
~23K SLoC