mirror of
https://github.com/esp-rs/esp-hal.git
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0064766ef2
* No longer publicly expose the `PeripheralClockControl` struct * Update examples as needed to get things building again * Update CHANGELOG.md * Address review feedback, fix a warning * Use a critical section for all devices other than the ESP32-C6/H2, as they modify multiple registers * Rebase and update `etm` driver to fix build errors
86 lines
2.3 KiB
Rust
86 lines
2.3 KiB
Rust
//! This shows some of the interrupts that can be generated by UART/Serial.
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//! Use a proper serial terminal to connect to the board (espmonitor and
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//! espflash won't work)
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#![no_std]
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#![no_main]
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use core::{cell::RefCell, fmt::Write};
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use critical_section::Mutex;
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use esp32s2_hal::{
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clock::ClockControl,
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interrupt,
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peripherals::{self, Peripherals, UART0},
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prelude::*,
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timer::TimerGroup,
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uart::config::AtCmdConfig,
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Uart,
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};
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use esp_backtrace as _;
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use nb::block;
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static SERIAL: Mutex<RefCell<Option<Uart<UART0>>>> = Mutex::new(RefCell::new(None));
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#[entry]
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fn main() -> ! {
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let peripherals = Peripherals::take();
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let system = peripherals.SYSTEM.split();
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let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
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// Disable the TIMG watchdog timer.
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let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
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let mut timer0 = timer_group0.timer0;
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let mut uart0 = Uart::new(peripherals.UART0, &clocks);
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uart0.set_at_cmd(AtCmdConfig::new(None, None, None, b'#', None));
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uart0.set_rx_fifo_full_threshold(30).unwrap();
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uart0.listen_at_cmd();
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uart0.listen_rx_fifo_full();
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interrupt::enable(
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peripherals::Interrupt::UART0,
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interrupt::Priority::Priority2,
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)
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.unwrap();
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timer0.start(1u64.secs());
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critical_section::with(|cs| SERIAL.borrow_ref_mut(cs).replace(uart0));
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loop {
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critical_section::with(|cs| {
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let mut serial = SERIAL.borrow_ref_mut(cs);
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let serial = serial.as_mut().unwrap();
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writeln!(serial, "Hello World! Send a single `#` character or send at least 30 characters and see the interrupts trigger.").ok();
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});
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block!(timer0.wait()).unwrap();
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}
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}
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#[interrupt]
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fn UART0() {
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critical_section::with(|cs| {
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let mut serial = SERIAL.borrow_ref_mut(cs);
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let serial = serial.as_mut().unwrap();
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let mut cnt = 0;
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while let nb::Result::Ok(_c) = serial.read() {
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cnt += 1;
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}
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writeln!(serial, "Read {} bytes", cnt,).ok();
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writeln!(
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serial,
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"Interrupt AT-CMD: {} RX-FIFO-FULL: {}",
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serial.at_cmd_interrupt_set(),
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serial.rx_fifo_full_interrupt_set(),
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)
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.ok();
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serial.reset_at_cmd_interrupt();
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serial.reset_rx_fifo_full_interrupt();
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});
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}
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