78 lines
2.4 KiB
Rust
78 lines
2.4 KiB
Rust
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#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_stm32::pwm::complementary_pwm::{Ckd, ComplementaryPwm, ComplementaryPwmPin};
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use embassy_stm32::pwm::simple_pwm::{PwmPin, SimplePwm};
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use embassy_stm32::pwm::Channel;
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use embassy_stm32::time::khz;
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use embassy_time::{Duration, Timer};
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use {defmt_rtt as _, panic_probe as _};
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let p = embassy_stm32::init(Default::default());
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info!("Hello World!");
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let ch1 = PwmPin::new_ch1(p.PE9);
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let ch1n = ComplementaryPwmPin::new_ch1(p.PA7);
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let mut pwm = ComplementaryPwm::new(
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p.TIM1,
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Some(ch1),
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Some(ch1n),
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None,
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None,
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None,
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None,
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None,
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None,
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khz(10),
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);
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/*
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Dead-time = T_clk * T_dts * T_dtg
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T_dts:
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This bit-field indicates the division ratio between the timer clock (CK_INT) frequency and the
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dead-time and sampling clock (tDTS)used by the dead-time generators and the digital filters
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(ETR, TIx),
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00: tDTS=tCK_INT
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01: tDTS=2*tCK_INT
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10: tDTS=4*tCK_INT
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T_dtg:
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This bit-field defines the duration of the dead-time inserted between the complementary
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outputs. DT correspond to this duration.
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DTG[7:5]=0xx => DT=DTG[7:0]x tdtg with tdtg=tDTS.
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DTG[7:5]=10x => DT=(64+DTG[5:0])xtdtg with Tdtg=2xtDTS.
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DTG[7:5]=110 => DT=(32+DTG[4:0])xtdtg with Tdtg=8xtDTS.
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DTG[7:5]=111 => DT=(32+DTG[4:0])xtdtg with Tdtg=16xtDTS.
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Example if TDTS=125ns (8MHz), dead-time possible values are:
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0 to 15875 ns by 125 ns steps,
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16 us to 31750 ns by 250 ns steps,
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32 us to 63us by 1 us steps,
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64 us to 126 us by 2 us steps
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*/
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pwm.set_dead_time_clock_division(Ckd::DIV1);
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pwm.set_dead_time_value(0);
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let max = pwm.get_max_duty();
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pwm.enable(Channel::Ch1);
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info!("PWM initialized");
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info!("PWM max duty {}", max);
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loop {
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pwm.set_duty(Channel::Ch1, 0);
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Timer::after(Duration::from_millis(300)).await;
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pwm.set_duty(Channel::Ch1, max / 4);
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Timer::after(Duration::from_millis(300)).await;
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pwm.set_duty(Channel::Ch1, max / 2);
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Timer::after(Duration::from_millis(300)).await;
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pwm.set_duty(Channel::Ch1, max - 1);
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Timer::after(Duration::from_millis(300)).await;
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}
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}
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