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//! The example uses FIFO and interrupts, wrapped in async API.
//!
//! This example controls AD5171 digital potentiometer via I2C with the LP-MSPM0L1306 board.
#![no_std]
#![no_main]
use defmt::*;
use embassy_executor::Spawner;
use embassy_mspm0::bind_interrupts;
use embassy_mspm0::i2c::{Config, I2c, InterruptHandler};
use embassy_mspm0::peripherals::I2C0;
use embassy_time::Timer;
use {defmt_rtt as _, panic_halt as _};
const ADDRESS: u8 = 0x6a;
bind_interrupts!(struct Irqs {
I2C0 => InterruptHandler<I2C0>;
});
#[embassy_executor::main]
async fn main(_spawner: Spawner) -> ! {
let p = embassy_mspm0::init(Default::default());
let instance = p.I2C0;
let scl = p.PA1;
let sda = p.PA0;
let mut i2c = unwrap!(I2c::new_async(instance, scl, sda, Irqs, Config::default()));
let mut pot_value: u8 = 0;
loop {
let to_write = [0u8, pot_value];
match i2c.async_write(ADDRESS, &to_write).await {
Ok(()) => info!("New potentioemter value: {}", pot_value),
Err(e) => error!("I2c Error: {:?}", e),
}
pot_value += 1;
// if reached 64th position (max)
// start over from lowest value
if pot_value == 64 {
pot_value = 0;
}
Timer::after_millis(500).await;
}
}
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