read/write dead_time

CHANGELOG.md

@@ -11,7 +11,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
  - Bump `synopsys-usb-otg` to 0.3.2 (bug fix)
  - Update readme, clippy fixes
- - Added possibility to pass complementary pins to `Pwm` and change pwm channel polarity [#571]
+ - Added possibility to pass complementary pins to `Pwm` and change pwm channel polarity [#571],
+   set dead time and idle state for advanced timers [#578]
 
 ### Added
 
@@ -27,6 +28,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 [#571]: https://github.com/stm32-rs/stm32f4xx-hal/pull/571
 [#572]: https://github.com/stm32-rs/stm32f4xx-hal/pull/572
 [#577]: https://github.com/stm32-rs/stm32f4xx-hal/pull/577
+[#578]: https://github.com/stm32-rs/stm32f4xx-hal/pull/578
+
 
 ## [v0.14.0] - 2022-12-12
 

src/timer.rs

@@ -64,6 +64,13 @@ pub enum Polarity {
     ActiveLow,
 }
 
+/// Output Idle state
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum IdleState {
+    Reset,
+    Set,
+}
+
 /// Interrupt events
 #[derive(Clone, Copy, PartialEq, Eq)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
@@ -239,7 +246,7 @@ pub type CCR4<T> = CCR<T, 3>;
 pub struct DMAR<T>(T);
 
 mod sealed {
-    use super::{Channel, Event, Ocm, Polarity};
+    use super::{Channel, Event, IdleState, Ocm, Polarity};
     pub trait General {
         type Width: Into<u32> + From<u16>;
         fn max_auto_reload() -> u32;
@@ -266,6 +273,7 @@ mod sealed {
 
     pub trait WithPwmCommon: General {
         const CH_NUMBER: u8;
+        const COMP_CH_NUMBER: u8;
         fn read_cc_value(channel: u8) -> u32;
         fn set_cc_value(channel: u8, value: u32);
         fn enable_channel(channel: u8, b: bool);
@@ -275,6 +283,9 @@ mod sealed {
 
     pub trait Advanced: WithPwmCommon {
         fn enable_nchannel(channel: u8, b: bool);
+        fn set_dtg_value(value: u8);
+        fn read_dtg_value() -> u8;
+        fn idle_state(channel: u8, comp: bool, s: IdleState);
     }
 
     pub trait WithPwm: WithPwmCommon {
@@ -409,6 +420,7 @@ macro_rules! hal {
             $(
                 impl WithPwmCommon for $TIM {
                     const CH_NUMBER: u8 = $cnum;
+                    const COMP_CH_NUMBER: u8 = $cnum;
 
                     #[inline(always)]
                     fn read_cc_value(c: u8) -> u32 {
@@ -448,7 +460,7 @@ macro_rules! hal {
                     #[inline(always)]
                     fn set_nchannel_polarity(c: u8, p: Polarity) {
                         let tim = unsafe { &*<$TIM>::ptr() };
-                        if c < Self::CH_NUMBER {
+                        if c < Self::COMP_CH_NUMBER {
                             unsafe { bb::write(&tim.ccer, c*4 + 3, p == Polarity::ActiveLow); }
                         }
                     }
@@ -459,10 +471,30 @@ macro_rules! hal {
                         fn enable_nchannel(c: u8, b: bool) {
                             let $aoe = ();
                             let tim = unsafe { &*<$TIM>::ptr() };
-                            if c < Self::CH_NUMBER {
+                            if c < Self::COMP_CH_NUMBER {
                                 unsafe { bb::write(&tim.ccer, c*4 + 2, b); }
                             }
                         }
+                        fn set_dtg_value(value: u8) {
+                            let tim = unsafe { &*<$TIM>::ptr() };
+                            tim.bdtr.modify(|_,w| unsafe { w.dtg().bits(value) });
+                        }
+                        fn read_dtg_value() -> u8 {
+                            let tim = unsafe { &*<$TIM>::ptr() };
+                            tim.bdtr.read().dtg().bits()
+                        }
+                        fn idle_state(c: u8, comp: bool, s: IdleState) {
+                            let tim = unsafe { &*<$TIM>::ptr() };
+                            if !comp {
+                                if c < Self::CH_NUMBER {
+                                    unsafe { bb::write(&tim.cr2, c*2 + 8, s == IdleState::Set); }
+                                }
+                            } else {
+                                if c < Self::COMP_CH_NUMBER {
+                                    unsafe { bb::write(&tim.cr2, c*2 + 9, s == IdleState::Set); }
+                                }
+                            }
+                        }
                     }
                 )?
 

src/timer/pwm.rs

@@ -34,7 +34,8 @@
 //! and change their polarity with `set_polarity` and `set_complementary_polarity`.
 
 use super::{
-    compute_arr_presc, Advanced, Channel, FTimer, Instance, Ocm, Polarity, Timer, WithPwm,
+    compute_arr_presc, Advanced, Channel, FTimer, IdleState, Instance, Ocm, Polarity, Timer,
+    WithPwm,
 };
 use crate::rcc::Clocks;
 use core::marker::PhantomData;
@@ -263,6 +264,16 @@ impl<TIM: Instance + WithPwm + Advanced, const C: u8> PwmChannel<TIM, C, true> {
     pub fn enable_complementary(&mut self) {
         TIM::enable_nchannel(C, true);
     }
+
+    #[inline]
+    pub fn set_idle_state(&mut self, s: IdleState) {
+        TIM::idle_state(C, false, s);
+    }
+
+    #[inline]
+    pub fn set_complementary_idle_state(&mut self, s: IdleState) {
+        TIM::idle_state(C, true, s);
+    }
 }
 
 pub struct PwmHz<TIM, P, PINS>
@@ -359,22 +370,27 @@ where
     TIM: Instance + WithPwm,
     PINS: Pins<TIM, P>,
 {
+    #[inline]
     pub fn enable(&mut self, channel: Channel) {
         TIM::enable_channel(PINS::check_used(channel) as u8, true)
     }
 
+    #[inline]
     pub fn disable(&mut self, channel: Channel) {
         TIM::enable_channel(PINS::check_used(channel) as u8, false)
     }
 
+    #[inline]
     pub fn set_polarity(&mut self, channel: Channel, p: Polarity) {
         TIM::set_channel_polarity(PINS::check_used(channel) as u8, p);
     }
 
+    #[inline]
     pub fn get_duty(&self, channel: Channel) -> u16 {
         TIM::read_cc_value(PINS::check_used(channel) as u8) as u16
     }
 
+    #[inline]
     pub fn set_duty(&mut self, channel: Channel, duty: u16) {
         TIM::set_cc_value(PINS::check_used(channel) as u8, duty as u32)
     }
@@ -402,6 +418,7 @@ where
         self.tim.cnt_reset();
     }
 
+    #[inline]
     pub fn set_complementary_polarity(&mut self, channel: Channel, p: Polarity) {
         TIM::set_channel_polarity(PINS::check_complementary_used(channel) as u8, p);
     }
@@ -412,13 +429,50 @@ where
     TIM: Instance + WithPwm + Advanced,
     PINS: Pins<TIM, P>,
 {
+    #[inline]
     pub fn enable_complementary(&mut self, channel: Channel) {
         TIM::enable_nchannel(PINS::check_complementary_used(channel) as u8, true)
     }
 
+    #[inline]
     pub fn disable_complementary(&mut self, channel: Channel) {
         TIM::enable_nchannel(PINS::check_complementary_used(channel) as u8, false)
     }
+
+    /// Set number DTS ticks during that complementary pin is `dead`
+    #[inline]
+    pub fn set_dead_time(&mut self, dts_ticks: u16) {
+        let bits = pack_ceil_dead_time(dts_ticks);
+        TIM::set_dtg_value(bits);
+    }
+
+    /// Set raw dead time (DTG) bits
+    #[inline]
+    pub fn set_dead_time_bits(&mut self, bits: u8) {
+        TIM::set_dtg_value(bits);
+    }
+
+    /// Return dead time for complementary pins in DTS ticks
+    #[inline]
+    pub fn get_dead_time(&self) -> u16 {
+        unpack_dead_time(TIM::read_dtg_value())
+    }
+
+    /// Get raw dead time (DTG) bits
+    #[inline]
+    pub fn get_dead_time_bits(&self) -> u8 {
+        TIM::read_dtg_value()
+    }
+
+    #[inline]
+    pub fn set_idle_state(&mut self, channel: Channel, s: IdleState) {
+        TIM::idle_state(PINS::check_used(channel) as u8, false, s);
+    }
+
+    #[inline]
+    pub fn set_complementary_idle_state(&mut self, channel: Channel, s: IdleState) {
+        TIM::idle_state(PINS::check_complementary_used(channel) as u8, true, s);
+    }
 }
 
 pub struct Pwm<TIM, P, PINS, const FREQ: u32>
@@ -517,30 +571,37 @@ where
     TIM: Instance + WithPwm,
     PINS: Pins<TIM, P>,
 {
+    #[inline]
     pub fn enable(&mut self, channel: Channel) {
         TIM::enable_channel(PINS::check_used(channel) as u8, true)
     }
 
+    #[inline]
     pub fn disable(&mut self, channel: Channel) {
         TIM::enable_channel(PINS::check_used(channel) as u8, false)
     }
 
+    #[inline]
     pub fn set_polarity(&mut self, channel: Channel, p: Polarity) {
         TIM::set_channel_polarity(PINS::check_used(channel) as u8, p);
     }
 
+    #[inline]
     pub fn get_duty(&self, channel: Channel) -> u16 {
         TIM::read_cc_value(PINS::check_used(channel) as u8) as u16
     }
 
+    #[inline]
     pub fn get_duty_time(&self, channel: Channel) -> TimerDurationU32<FREQ> {
         TimerDurationU32::from_ticks(TIM::read_cc_value(PINS::check_used(channel) as u8))
     }
 
+    #[inline]
     pub fn set_duty(&mut self, channel: Channel, duty: u16) {
         TIM::set_cc_value(PINS::check_used(channel) as u8, duty.into())
     }
 
+    #[inline]
     pub fn set_duty_time(&mut self, channel: Channel, duty: TimerDurationU32<FREQ>) {
         TIM::set_cc_value(PINS::check_used(channel) as u8, duty.ticks())
     }
@@ -559,6 +620,7 @@ where
         self.tim.cnt_reset();
     }
 
+    #[inline]
     pub fn set_complementary_polarity(&mut self, channel: Channel, p: Polarity) {
         TIM::set_channel_polarity(PINS::check_complementary_used(channel) as u8, p);
     }
@@ -569,11 +631,70 @@ where
     TIM: Instance + WithPwm + Advanced,
     PINS: Pins<TIM, P>,
 {
+    #[inline]
     pub fn enable_complementary(&mut self, channel: Channel) {
         TIM::enable_nchannel(PINS::check_complementary_used(channel) as u8, true)
     }
 
+    #[inline]
     pub fn disable_complementary(&mut self, channel: Channel) {
         TIM::enable_nchannel(PINS::check_complementary_used(channel) as u8, false)
     }
+
+    /// Set number DTS ticks during that complementary pin is `dead`
+    #[inline]
+    pub fn set_dead_time(&mut self, dts_ticks: u16) {
+        let bits = pack_ceil_dead_time(dts_ticks);
+        TIM::set_dtg_value(bits);
+    }
+
+    /// Set raw dead time (DTG) bits
+    #[inline]
+    pub fn set_dead_time_bits(&mut self, bits: u8) {
+        TIM::set_dtg_value(bits);
+    }
+
+    /// Return dead time for complementary pins in DTS ticks
+    #[inline]
+    pub fn get_dead_time(&self) -> u16 {
+        unpack_dead_time(TIM::read_dtg_value())
+    }
+
+    /// Get raw dead time (DTG) bits
+    #[inline]
+    pub fn get_dead_time_bits(&self) -> u8 {
+        TIM::read_dtg_value()
+    }
+
+    #[inline]
+    pub fn set_idle_state(&mut self, channel: Channel, s: IdleState) {
+        TIM::idle_state(PINS::check_used(channel) as u8, false, s);
+    }
+
+    #[inline]
+    pub fn set_complementary_idle_state(&mut self, channel: Channel, s: IdleState) {
+        TIM::idle_state(PINS::check_complementary_used(channel) as u8, true, s);
+    }
+}
+
+const fn pack_ceil_dead_time(dts_ticks: u16) -> u8 {
+    match dts_ticks {
+        0..=127 => dts_ticks as u8,
+        128..=254 => ((((dts_ticks + 1) >> 1) - 64) as u8) | 0b_1000_0000,
+        255..=504 => ((((dts_ticks + 7) >> 3) - 32) as u8) | 0b_1100_0000,
+        505..=1008 => ((((dts_ticks + 15) >> 4) - 32) as u8) | 0b_1110_0000,
+        1009.. => 0xff,
+    }
+}
+
+const fn unpack_dead_time(bits: u8) -> u16 {
+    if bits & 0b_1000_0000 == 0 {
+        bits as u16
+    } else if bits & 0b_0100_0000 == 0 {
+        (((bits & !0b_1000_0000) as u16) + 64) * 2
+    } else if bits & 0b_0010_0000 == 0 {
+        (((bits & !0b_1100_0000) as u16) + 32) * 8
+    } else {
+        (((bits & !0b_1110_0000) as u16) + 32) * 16
+    }
 }