79 lines
2.5 KiB
Rust
79 lines
2.5 KiB
Rust
//! Simple PWM example
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#![no_main]
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#![no_std]
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use cortex_m_rt::entry;
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use embedded_hal::PwmPin;
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use panic_rtt_target as _;
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use rtt_target::{rprintln, rtt_init_print};
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use va108xx_hal::{
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gpio::PinsA,
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pac::{self, interrupt},
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prelude::*,
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pwm::{self, get_duty_from_percent, ReducedPwmPin, PWMA, PWMB},
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timer::{default_ms_irq_handler, set_up_ms_timer, Delay},
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};
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#[entry]
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fn main() -> ! {
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rtt_init_print!();
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rprintln!("-- VA108xx PWM example application--");
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let mut dp = pac::Peripherals::take().unwrap();
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let pinsa = PinsA::new(&mut dp.SYSCONFIG, None, dp.PORTA);
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let mut pwm = pwm::PwmPin::new(
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(pinsa.pa3.into_funsel_1(), dp.TIM3),
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50.mhz(),
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&mut dp.SYSCONFIG,
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10.hz(),
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);
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let timer = set_up_ms_timer(
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&mut dp.SYSCONFIG,
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&mut dp.IRQSEL,
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50.mhz().into(),
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dp.TIM0,
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pac::Interrupt::OC0,
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);
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let mut delay = Delay::new(timer);
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unsafe {
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cortex_m::peripheral::NVIC::unmask(pac::Interrupt::OC0);
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}
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let mut current_duty_cycle = 0.0;
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PwmPin::set_duty(&mut pwm, get_duty_from_percent(current_duty_cycle));
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PwmPin::enable(&mut pwm);
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// Delete type information, increased code readibility for the rest of the code
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let mut reduced_pin = ReducedPwmPin::from(pwm);
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loop {
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// Increase duty cycle continuously
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while current_duty_cycle < 1.0 {
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delay.delay_ms(200);
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current_duty_cycle += 0.02;
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PwmPin::set_duty(&mut reduced_pin, get_duty_from_percent(current_duty_cycle));
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}
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// Switch to PWMB and decrease the window with a high signal from 100 % to 0 %
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// continously
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current_duty_cycle = 0.0;
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let mut upper_limit = 1.0;
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let mut lower_limit = 0.0;
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let mut pwmb: ReducedPwmPin<PWMB> = ReducedPwmPin::from(reduced_pin);
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pwmb.set_pwmb_lower_limit(get_duty_from_percent(lower_limit));
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pwmb.set_pwmb_upper_limit(get_duty_from_percent(upper_limit));
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while lower_limit < 0.5 {
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delay.delay_ms(200);
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lower_limit += 0.01;
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upper_limit -= 0.01;
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pwmb.set_pwmb_lower_limit(get_duty_from_percent(lower_limit));
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pwmb.set_pwmb_upper_limit(get_duty_from_percent(upper_limit));
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rprintln!("Lower limit: {}", pwmb.pwmb_lower_limit());
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rprintln!("Upper limit: {}", pwmb.pwmb_upper_limit());
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}
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reduced_pin = ReducedPwmPin::<PWMA>::from(pwmb);
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}
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}
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#[interrupt]
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fn OC0() {
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default_ms_irq_handler()
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}
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