Merge pull request #1712 from xoviat/pwm

stm32/pwm: add output type control

embassy-stm32/src/gpio.rs

@@ -502,6 +502,20 @@ impl<'d, T: Pin> OutputOpenDrain<'d, T> {
     }
 }
 
+pub enum OutputType {
+    PushPull,
+    OpenDrain,
+}
+
+impl From<OutputType> for sealed::AFType {
+    fn from(value: OutputType) -> Self {
+        match value {
+            OutputType::OpenDrain => sealed::AFType::OutputOpenDrain,
+            OutputType::PushPull => sealed::AFType::OutputPushPull,
+        }
+    }
+}
+
 pub(crate) mod sealed {
     use super::*;
 

embassy-stm32/src/timer/complementary_pwm.rs

@@ -7,7 +7,7 @@ use super::simple_pwm::*;
 use super::*;
 #[allow(unused_imports)]
 use crate::gpio::sealed::{AFType, Pin};
-use crate::gpio::AnyPin;
+use crate::gpio::{AnyPin, OutputType};
 use crate::time::Hertz;
 use crate::Peripheral;
 
@@ -17,13 +17,13 @@ pub struct ComplementaryPwmPin<'d, Perip, Channel> {
 }
 
 macro_rules! complementary_channel_impl {
-    ($new_chx:ident, $channel:ident, $pin_trait:ident, $complementary_pin_trait:ident) => {
+    ($new_chx:ident, $channel:ident, $pin_trait:ident) => {
         impl<'d, Perip: CaptureCompare16bitInstance> ComplementaryPwmPin<'d, Perip, $channel> {
-            pub fn $new_chx(pin: impl Peripheral<P = impl $complementary_pin_trait<Perip>> + 'd) -> Self {
+            pub fn $new_chx(pin: impl Peripheral<P = impl $pin_trait<Perip>> + 'd, output_type: OutputType) -> Self {
                 into_ref!(pin);
                 critical_section::with(|_| {
                     pin.set_low();
-                    pin.set_as_af(pin.af_num(), AFType::OutputPushPull);
+                    pin.set_as_af(pin.af_num(), output_type.into());
                     #[cfg(gpio_v2)]
                     pin.set_speed(crate::gpio::Speed::VeryHigh);
                 });
@@ -36,10 +36,10 @@ macro_rules! complementary_channel_impl {
     };
 }
 
-complementary_channel_impl!(new_ch1, Ch1, Channel1Pin, Channel1ComplementaryPin);
+complementary_channel_impl!(new_ch1, Ch1, Channel1ComplementaryPin);
-complementary_channel_impl!(new_ch2, Ch2, Channel2Pin, Channel2ComplementaryPin);
+complementary_channel_impl!(new_ch2, Ch2, Channel2ComplementaryPin);
-complementary_channel_impl!(new_ch3, Ch3, Channel3Pin, Channel3ComplementaryPin);
+complementary_channel_impl!(new_ch3, Ch3, Channel3ComplementaryPin);
-complementary_channel_impl!(new_ch4, Ch4, Channel4Pin, Channel4ComplementaryPin);
+complementary_channel_impl!(new_ch4, Ch4, Channel4ComplementaryPin);
 
 pub struct ComplementaryPwm<'d, T> {
     inner: PeripheralRef<'d, T>,

embassy-stm32/src/timer/simple_pwm.rs

@@ -5,7 +5,7 @@ use embassy_hal_internal::{into_ref, PeripheralRef};
 use super::*;
 #[allow(unused_imports)]
 use crate::gpio::sealed::{AFType, Pin};
-use crate::gpio::AnyPin;
+use crate::gpio::{AnyPin, OutputType};
 use crate::time::Hertz;
 use crate::Peripheral;
 
@@ -22,11 +22,11 @@ pub struct PwmPin<'d, Perip, Channel> {
 macro_rules! channel_impl {
     ($new_chx:ident, $channel:ident, $pin_trait:ident) => {
         impl<'d, Perip: CaptureCompare16bitInstance> PwmPin<'d, Perip, $channel> {
-            pub fn $new_chx(pin: impl Peripheral<P = impl $pin_trait<Perip>> + 'd) -> Self {
+            pub fn $new_chx(pin: impl Peripheral<P = impl $pin_trait<Perip>> + 'd, output_type: OutputType) -> Self {
                 into_ref!(pin);
                 critical_section::with(|_| {
                     pin.set_low();
-                    pin.set_as_af(pin.af_num(), AFType::OutputPushPull);
+                    pin.set_as_af(pin.af_num(), output_type.into());
                     #[cfg(gpio_v2)]
                     pin.set_speed(crate::gpio::Speed::VeryHigh);
                 });

examples/stm32f4/src/bin/pwm.rs

@@ -4,6 +4,7 @@
 
 use defmt::*;
 use embassy_executor::Spawner;
+use embassy_stm32::gpio::OutputType;
 use embassy_stm32::time::khz;
 use embassy_stm32::timer::simple_pwm::{PwmPin, SimplePwm};
 use embassy_stm32::timer::Channel;
@@ -15,7 +16,7 @@ async fn main(_spawner: Spawner) {
     let p = embassy_stm32::init(Default::default());
     info!("Hello World!");
 
-    let ch1 = PwmPin::new_ch1(p.PE9);
+    let ch1 = PwmPin::new_ch1(p.PE9, OutputType::PushPull);
     let mut pwm = SimplePwm::new(p.TIM1, Some(ch1), None, None, None, khz(10));
     let max = pwm.get_max_duty();
     pwm.enable(Channel::Ch1);

examples/stm32f4/src/bin/pwm_complementary.rs

@@ -4,6 +4,7 @@
 
 use defmt::*;
 use embassy_executor::Spawner;
+use embassy_stm32::gpio::OutputType;
 use embassy_stm32::time::khz;
 use embassy_stm32::timer::complementary_pwm::{ComplementaryPwm, ComplementaryPwmPin};
 use embassy_stm32::timer::simple_pwm::PwmPin;
@@ -16,8 +17,8 @@ async fn main(_spawner: Spawner) {
     let p = embassy_stm32::init(Default::default());
     info!("Hello World!");
 
-    let ch1 = PwmPin::new_ch1(p.PE9);
+    let ch1 = PwmPin::new_ch1(p.PE9, OutputType::PushPull);
-    let ch1n = ComplementaryPwmPin::new_ch1(p.PA7);
+    let ch1n = ComplementaryPwmPin::new_ch1(p.PA7, OutputType::PushPull);
     let mut pwm = ComplementaryPwm::new(
         p.TIM1,
         Some(ch1),

examples/stm32g4/src/bin/pwm.rs

@@ -4,6 +4,7 @@
 
 use defmt::*;
 use embassy_executor::Spawner;
+use embassy_stm32::gpio::OutputType;
 use embassy_stm32::time::khz;
 use embassy_stm32::timer::simple_pwm::{PwmPin, SimplePwm};
 use embassy_stm32::timer::Channel;
@@ -15,7 +16,7 @@ async fn main(_spawner: Spawner) {
     let p = embassy_stm32::init(Default::default());
     info!("Hello World!");
 
-    let ch1 = PwmPin::new_ch1(p.PC0);
+    let ch1 = PwmPin::new_ch1(p.PC0, OutputType::PushPull);
     let mut pwm = SimplePwm::new(p.TIM1, Some(ch1), None, None, None, khz(10));
     let max = pwm.get_max_duty();
     pwm.enable(Channel::Ch1);

examples/stm32h7/src/bin/pwm.rs

@@ -4,6 +4,7 @@
 
 use defmt::*;
 use embassy_executor::Spawner;
+use embassy_stm32::gpio::OutputType;
 use embassy_stm32::time::{khz, mhz};
 use embassy_stm32::timer::simple_pwm::{PwmPin, SimplePwm};
 use embassy_stm32::timer::Channel;
@@ -24,7 +25,7 @@ async fn main(_spawner: Spawner) {
     let p = embassy_stm32::init(config);
     info!("Hello World!");
 
-    let ch1 = PwmPin::new_ch1(p.PA6);
+    let ch1 = PwmPin::new_ch1(p.PA6, OutputType::PushPull);
     let mut pwm = SimplePwm::new(p.TIM3, Some(ch1), None, None, None, khz(10));
     let max = pwm.get_max_duty();
     pwm.enable(Channel::Ch1);