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- //! Testing PWM output
- #![deny(unsafe_code)]
- #![deny(warnings)]
- #![no_main]
- #![no_std]
- extern crate panic_halt;
- use cortex_m::asm;
- use stm32f1xx_hal::{
- prelude::*,
- pac,
- };
- use cortex_m_rt::entry;
- #[entry]
- fn main() -> ! {
- let p = pac::Peripherals::take().unwrap();
- let mut flash = p.FLASH.constrain();
- let mut rcc = p.RCC.constrain();
- let clocks = rcc.cfgr.freeze(&mut flash.acr);
- let mut afio = p.AFIO.constrain(&mut rcc.apb2);
- // let mut gpioa = p.GPIOA.split(&mut rcc.apb2);
- let mut gpiob = p.GPIOB.split(&mut rcc.apb2);
- // TIM2
- // let c1 = gpioa.pa0.into_alternate_push_pull(&mut gpioa.crl);
- // let c2 = gpioa.pa1.into_alternate_push_pull(&mut gpioa.crl);
- // let c3 = gpioa.pa2.into_alternate_push_pull(&mut gpioa.crl);
- // let c4 = gpioa.pa3.into_alternate_push_pull(&mut gpioa.crl);
- // TIM3
- // let c1 = gpioa.pa6.into_alternate_push_pull(&mut gpioa.crl);
- // let c2 = gpioa.pa7.into_alternate_push_pull(&mut gpioa.crl);
- // let c3 = gpiob.pb0.into_alternate_push_pull(&mut gpiob.crl);
- // let c4 = gpiob.pb1.into_alternate_push_pull(&mut gpiob.crl);
- // TIM4
- let c1 = gpiob.pb6.into_alternate_push_pull(&mut gpiob.crl);
- let c2 = gpiob.pb7.into_alternate_push_pull(&mut gpiob.crl);
- let c3 = gpiob.pb8.into_alternate_push_pull(&mut gpiob.crh);
- let c4 = gpiob.pb9.into_alternate_push_pull(&mut gpiob.crh);
- let mut pwm = p
- .TIM4
- .pwm(
- (c1, c2, c3, c4),
- &mut afio.mapr,
- 1.khz(),
- clocks,
- &mut rcc.apb1,
- )
- .3;
- let max = pwm.get_max_duty();
- pwm.enable();
- // full
- pwm.set_duty(max);
- asm::bkpt();
- // dim
- pwm.set_duty(max / 4);
- asm::bkpt();
- // zero
- pwm.set_duty(0);
- asm::bkpt();
- loop {}
- }
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