stm32f1_hal/common/timer/
pwm.rs

1use super::*;
2use core::convert::Infallible;
3use embedded_hal::pwm::{ErrorType, SetDutyCycle};
4
5pub struct PwmTimer<TIM> {
6    tim: TIM,
7    clk: Hertz,
8}
9impl<TIM: TimerWithPwm> PwmTimer<TIM> {
10    pub fn new(tim: TIM, clk: Hertz) -> Self {
11        Self { tim, clk }
12    }
13
14    #[inline(always)]
15    pub fn start(&mut self) {
16        self.tim.start_pwm();
17    }
18
19    #[inline(always)]
20    pub fn stop(&mut self) {
21        self.tim.stop_pwm();
22    }
23
24    #[inline]
25    pub fn get_count_value(&self) -> u32 {
26        self.tim.read_count()
27    }
28
29    #[inline]
30    pub fn get_max_duty(&self) -> u32 {
31        self.tim.read_auto_reload().wrapping_add(1)
32    }
33
34    #[inline]
35    pub fn config_freq(&mut self, update_freq: Hertz) {
36        self.tim.config_freq(self.clk, update_freq);
37    }
38}
39
40// Channels -------------------------------------------------------------------
41
42macro_rules! pwm_channel {
43    ($name:ident, $Tim:ident, $ch:expr, $en:ident) => {
44        pub struct $name<TIM> {
45            tim: TIM,
46        }
47
48        impl<TIM> $name<TIM> {
49            pub fn new(tim: TIM) -> Self {
50                Self { tim }
51            }
52        }
53
54        impl<TIM: $Tim> ErrorType for $name<TIM> {
55            type Error = Infallible;
56        }
57
58        impl<TIM: $Tim> SetDutyCycle for $name<TIM> {
59            #[inline(always)]
60            fn max_duty_cycle(&self) -> u16 {
61                (self.tim.read_auto_reload() as u16).wrapping_add(1)
62            }
63
64            #[inline(always)]
65            fn set_duty_cycle(&mut self, duty: u16) -> Result<(), Self::Error> {
66                self.tim.set_ch1_cc_value(duty as u32);
67                Ok(())
68            }
69        }
70
71        impl<TIM: $Tim> PwmChannel for $name<TIM> {
72            #[inline(always)]
73            fn config(&mut self, mode: PwmMode, polarity: PwmPolarity) {
74                self.tim.preload_output_channel_in_mode($ch, mode.into());
75                self.tim.set_polarity($ch, polarity);
76            }
77
78            #[inline(always)]
79            fn set_enable(&mut self, en: bool) {
80                self.tim.$en(en);
81            }
82        }
83    };
84}
85pwm_channel!(PwmChannel1, TimerWithPwm1Ch, Channel::C1, enable_ch1);
86pwm_channel!(PwmChannel2, TimerWithPwm2Ch, Channel::C2, enable_ch2);
87pwm_channel!(PwmChannel3, TimerWithPwm3Ch, Channel::C3, enable_ch3);
88pwm_channel!(PwmChannel4, TimerWithPwm4Ch, Channel::C4, enable_ch4);
stm32f1_hal/common/timer/pwm.rs

stm32f1_hal/common/timer/
pwm.rs
