mirror of
https://github.com/esp-rs/esp-hal.git
synced 2025-10-02 14:44:42 +00:00
db409ffe7b
* Unify the system peripheral Whilst the PCR, SYSTEM and DPORT peripherals are different, we currently use them all in the same way. This PR unifies the peripheral name in the hal to `SYSTEM`. The idea is that they all do the same sort of thing, so we can collect them under the same name, and later down the line we can being to expose differences under an extended API. The benifits to this are imo quite big, the examples now are all identical, which makes things easier for esp-wifi, and paves a path towards the multichip hal. Why not do this in the PAC? Imo the pac should be as close to the hardware as possible, and the HAL is where we should abstractions such as this. * changelog
64 lines
1.5 KiB
Rust
64 lines
1.5 KiB
Rust
//! This demos a simple monitor for the XTAL frequency, by relying on a special
|
|
//! feature of the TIMG0 (Timer Group 0). This feature counts the number of XTAL
|
|
//! clock cycles within a given number of RTC_SLOW_CLK cycles.
|
|
|
|
#![no_std]
|
|
#![no_main]
|
|
|
|
use core::cell::RefCell;
|
|
|
|
use critical_section::Mutex;
|
|
use esp32_hal::{
|
|
clock::ClockControl,
|
|
interrupt,
|
|
peripherals::{self, Peripherals},
|
|
prelude::*,
|
|
Rtc,
|
|
};
|
|
use esp_backtrace as _;
|
|
|
|
static RTC: Mutex<RefCell<Option<Rtc>>> = Mutex::new(RefCell::new(None));
|
|
|
|
#[entry]
|
|
fn main() -> ! {
|
|
let peripherals = Peripherals::take();
|
|
let system = peripherals.SYSTEM.split();
|
|
let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
|
|
|
|
let mut rtc = Rtc::new(peripherals.RTC_CNTL);
|
|
rtc.rwdt.start(2000u64.millis());
|
|
rtc.rwdt.listen();
|
|
|
|
esp_println::println!(
|
|
"{: <10} XTAL frequency: {} MHz",
|
|
"[Expected]",
|
|
clocks.xtal_clock.to_MHz()
|
|
);
|
|
|
|
interrupt::enable(
|
|
peripherals::Interrupt::RTC_CORE,
|
|
interrupt::Priority::Priority1,
|
|
)
|
|
.unwrap();
|
|
|
|
critical_section::with(|cs| RTC.borrow_ref_mut(cs).replace(rtc));
|
|
|
|
loop {}
|
|
}
|
|
|
|
#[interrupt]
|
|
fn RTC_CORE() {
|
|
critical_section::with(|cs| {
|
|
let mut rtc = RTC.borrow_ref_mut(cs);
|
|
let rtc = rtc.as_mut().unwrap();
|
|
|
|
esp_println::println!(
|
|
"{: <10} XTAL frequency: {} MHz",
|
|
"[Monitor]",
|
|
rtc.estimate_xtal_frequency()
|
|
);
|
|
|
|
rtc.rwdt.clear_interrupt();
|
|
});
|
|
}
|