64 lines
2.2 KiB
Rust
64 lines
2.2 KiB
Rust
//! Simple PWM example
|
|
#![no_main]
|
|
#![no_std]
|
|
|
|
use cortex_m_rt::entry;
|
|
use embedded_hal::PwmPin;
|
|
use panic_rtt_target as _;
|
|
use rtt_target::{rprintln, rtt_init_print};
|
|
use va108xx_hal::{
|
|
gpio::PinsA,
|
|
pac,
|
|
prelude::*,
|
|
pwm::{self, get_duty_from_percent, ReducedPwmPin, PWMA, PWMB},
|
|
timer::set_up_ms_delay_provider,
|
|
};
|
|
|
|
#[entry]
|
|
fn main() -> ! {
|
|
rtt_init_print!();
|
|
rprintln!("-- VA108xx PWM example application--");
|
|
let mut dp = pac::Peripherals::take().unwrap();
|
|
let pinsa = PinsA::new(&mut dp.SYSCONFIG, None, dp.PORTA);
|
|
let mut pwm = pwm::PwmPin::new(
|
|
(pinsa.pa3.into_funsel_1(), dp.TIM3),
|
|
50.mhz(),
|
|
&mut dp.SYSCONFIG,
|
|
10.hz(),
|
|
);
|
|
let mut delay = set_up_ms_delay_provider(&mut dp.SYSCONFIG, 50.mhz(), dp.TIM0);
|
|
let mut current_duty_cycle = 0.0;
|
|
PwmPin::set_duty(&mut pwm, get_duty_from_percent(current_duty_cycle));
|
|
PwmPin::enable(&mut pwm);
|
|
|
|
// Delete type information, increased code readibility for the rest of the code
|
|
let mut reduced_pin = ReducedPwmPin::from(pwm);
|
|
loop {
|
|
// Increase duty cycle continuously
|
|
while current_duty_cycle < 1.0 {
|
|
delay.delay_ms(200_u16);
|
|
current_duty_cycle += 0.02;
|
|
PwmPin::set_duty(&mut reduced_pin, get_duty_from_percent(current_duty_cycle));
|
|
}
|
|
|
|
// Switch to PWMB and decrease the window with a high signal from 100 % to 0 %
|
|
// continously
|
|
current_duty_cycle = 0.0;
|
|
let mut upper_limit = 1.0;
|
|
let mut lower_limit = 0.0;
|
|
let mut pwmb: ReducedPwmPin<PWMB> = ReducedPwmPin::from(reduced_pin);
|
|
pwmb.set_pwmb_lower_limit(get_duty_from_percent(lower_limit));
|
|
pwmb.set_pwmb_upper_limit(get_duty_from_percent(upper_limit));
|
|
while lower_limit < 0.5 {
|
|
delay.delay_ms(200_u16);
|
|
lower_limit += 0.01;
|
|
upper_limit -= 0.01;
|
|
pwmb.set_pwmb_lower_limit(get_duty_from_percent(lower_limit));
|
|
pwmb.set_pwmb_upper_limit(get_duty_from_percent(upper_limit));
|
|
rprintln!("Lower limit: {}", pwmb.pwmb_lower_limit());
|
|
rprintln!("Upper limit: {}", pwmb.pwmb_upper_limit());
|
|
}
|
|
reduced_pin = ReducedPwmPin::<PWMA>::from(pwmb);
|
|
}
|
|
}
|