/*
For a detailed explanation of this code check out the associated blog post:
https://apollolabsblog.hashnode.dev/esp32-embedded-rust-at-the-hal-random-number-generator
GitHub Repo containing source code and other examples:
https://github.com/apollolabsdev
For notifications on similar examples and more, subscribe to newsletter here:
https://www.theembeddedrustacean.com/subscribe
*/
#![no_std]
#![no_main]
use esp32c3_hal::{
clock::ClockControl, esp_riscv_rt::entry, peripherals::Peripherals, prelude::*,
timer::TimerGroup, Delay, Rng, Rtc,
};
use esp_backtrace as _;
use esp_println::{print, println};
static MOCK_SENTENCES: &'static str = include_str!("nmea.rs");
#[entry]
fn main() -> ! {
// Take Peripherals, Initialize Clocks, and Create a Handle for Each
let peripherals = Peripherals::take();
let mut system = peripherals.SYSTEM.split();
let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
// Instantiate and Create Handles for the RTC and TIMG watchdog timers
let mut rtc = Rtc::new(peripherals.RTC_CNTL);
let timer_group0 = TimerGroup::new(
peripherals.TIMG0,
&clocks,
&mut system.peripheral_clock_control,
);
let mut wdt0 = timer_group0.wdt;
let timer_group1 = TimerGroup::new(
peripherals.TIMG1,
&clocks,
&mut system.peripheral_clock_control,
);
let mut wdt1 = timer_group1.wdt;
// Disable the RTC and TIMG watchdog timers
rtc.swd.disable();
rtc.rwdt.disable();
wdt0.disable();
wdt1.disable();
let mut delay = Delay::new(&clocks);
// Configure terminal: enable newline conversion
print!("\x1b[20h");
let mut rng = Rng::new(peripherals.RNG);
// Application Loop
loop {
let num = rng.random() as u8;
let sentence = MOCK_SENTENCES.lines().nth(num as usize).unwrap();
println!("{}", sentence);
delay.delay_ms(2000_u32);
}
}