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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
50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
//! Uses timer0 and operator0 of the MCPWM0 peripheral to output a 50% duty
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//! signal at 20 kHz.
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//!
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//! The signal will be output to the pin assigned to `pin`. (GPIO4)
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#![no_std]
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#![no_main]
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use esp32s3_hal::{
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clock::ClockControl,
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gpio::IO,
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mcpwm::{operator::PwmPinConfig, timer::PwmWorkingMode, PeripheralClockConfig, MCPWM},
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peripherals::Peripherals,
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prelude::*,
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};
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use esp_backtrace as _;
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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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let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
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let pin = io.pins.gpio4;
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// initialize peripheral
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let clock_cfg = PeripheralClockConfig::with_frequency(&clocks, 40u32.MHz()).unwrap();
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let mut mcpwm = MCPWM::new(peripherals.MCPWM0, clock_cfg);
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// connect operator0 to timer0
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mcpwm.operator0.set_timer(&mcpwm.timer0);
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// connect operator0 to pin
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let mut pwm_pin = mcpwm
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.operator0
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.with_pin_a(pin, PwmPinConfig::UP_ACTIVE_HIGH);
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// start timer with timestamp values in the range of 0..=99 and a frequency of
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// 20 kHz
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let timer_clock_cfg = clock_cfg
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.timer_clock_with_frequency(99, PwmWorkingMode::Increase, 20u32.kHz())
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.unwrap();
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mcpwm.timer0.start(timer_clock_cfg);
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// pin will be high 50% of the time
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pwm_pin.set_timestamp(50);
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loop {}
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}
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