68 lines
1.8 KiB
Rust
68 lines
1.8 KiB
Rust
//! Turns on LED with the option to change LED intensity depending on `duty` value.
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//!
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//! This assumes that a LED is connected to the pin assigned to `led`. (GPIO4)
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#![no_std]
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#![no_main]
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use core::fmt::Write;
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use esp32_hal::{
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gpio::IO,
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Serial,
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timer::TimerGroup,
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RtcCntl,
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clock::ClockControl,
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prelude::*,
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pac::Peripherals,
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};
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use esp_hal_common::ledc::{
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channel::{self, ChannelIFace},
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timer::{self, TimerIFace},
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HighSpeed, LEDC,
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};
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use panic_halt as _;
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use xtensa_lx_rt::entry;
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#[entry]
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fn main() -> ! {
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let peripherals = Peripherals::take().unwrap();
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let mut system = peripherals.DPORT.split();
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let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
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let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
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let mut wdt = timer_group0.wdt;
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let mut serial0 = Serial::new(peripherals.UART0);
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let mut rtc_cntl = RtcCntl::new(peripherals.RTC_CNTL);
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// Disable watchdog timer
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wdt.disable();
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rtc_cntl.set_wdt_global_enable(false);
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let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
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let led = io.pins.gpio4.into_push_pull_output();
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writeln!(serial0, "\nESP32 Started\n\n").unwrap();
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let ledc = LEDC::new(&clocks, &mut system.peripheral_clock_control);
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let mut hstimer0 = ledc.get_timer::<HighSpeed>(timer::Number::Timer0);
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hstimer0
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.configure(timer::config::Config {
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duty: timer::config::Duty::Duty5Bit,
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clock_source: timer::HSClockSource::APBClk,
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frequency: 24u32.kHz(),
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})
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.unwrap();
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let mut channel0 = ledc.get_channel(channel::Number::Channel0, led);
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channel0
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.configure(channel::config::Config {
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timer: &hstimer0,
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duty_pct: 0.1,
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})
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.unwrap();
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loop {}
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}
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