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
68 lines
1.7 KiB
Rust
68 lines
1.7 KiB
Rust
//! This shows how to configure UART
|
|
//! You can short the TX and RX pin and see it reads what was written.
|
|
//! Additionally you can connect a logic analzyer to TX and see how the changes
|
|
//! of the configuration change the output signal.
|
|
//!
|
|
//! The following wiring is assumed:
|
|
//! - TX => GPIO1
|
|
//! - RX => GPIO2
|
|
|
|
#![no_std]
|
|
#![no_main]
|
|
|
|
use esp32h2_hal::{
|
|
clock::ClockControl,
|
|
peripherals::Peripherals,
|
|
prelude::*,
|
|
timer::TimerGroup,
|
|
uart::{
|
|
config::{Config, DataBits, Parity, StopBits},
|
|
TxRxPins,
|
|
},
|
|
Uart,
|
|
IO,
|
|
};
|
|
use esp_backtrace as _;
|
|
use esp_println::println;
|
|
use nb::block;
|
|
|
|
#[entry]
|
|
fn main() -> ! {
|
|
let peripherals = Peripherals::take();
|
|
let system = peripherals.SYSTEM.split();
|
|
let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
|
|
|
|
let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
|
|
let mut timer0 = timer_group0.timer0;
|
|
|
|
let config = Config {
|
|
baudrate: 115200,
|
|
data_bits: DataBits::DataBits8,
|
|
parity: Parity::ParityNone,
|
|
stop_bits: StopBits::STOP1,
|
|
};
|
|
|
|
let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
|
|
let pins = TxRxPins::new_tx_rx(
|
|
io.pins.gpio1.into_push_pull_output(),
|
|
io.pins.gpio2.into_floating_input(),
|
|
);
|
|
|
|
let mut serial1 = Uart::new_with_config(peripherals.UART1, config, Some(pins), &clocks);
|
|
|
|
timer0.start(250u64.millis());
|
|
|
|
println!("Start");
|
|
loop {
|
|
serial1.write(0x42).ok();
|
|
let read = block!(serial1.read());
|
|
|
|
match read {
|
|
Ok(read) => println!("Read 0x{:02x}", read),
|
|
Err(err) => println!("Error {:?}", err),
|
|
}
|
|
|
|
block!(timer0.wait()).unwrap();
|
|
}
|
|
}
|