Merge v1, v2 DAC and update register definitions

embassy-stm32/src/dac.rs

@@ -1,8 +1,10 @@
+#![macro_use]
+
+use cfg_if::cfg_if;
 use embassy_hal_common::{into_ref, PeripheralRef};
 
-use crate::dac::{DacPin, Instance};
 use crate::pac::dac;
-use crate::Peripheral;
+use crate::{peripherals, Peripheral};
 
 #[derive(Debug, Copy, Clone, Eq, PartialEq)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
@@ -18,6 +20,15 @@ pub enum Channel {
     Ch2,
 }
 
+impl Channel {
+    fn index(&self) -> usize {
+        match self {
+            Channel::Ch1 => 0,
+            Channel::Ch2 => 1,
+        }
+    }
+}
+
 #[derive(Debug, Copy, Clone, Eq, PartialEq)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum Ch1Trigger {
@@ -119,28 +130,29 @@ impl<'d, T: Instance> Dac<'d, T> {
             // Sadly we cannot use `RccPeripheral::enable` since devices are quite inconsistent DAC clock
             // configuration.
             critical_section::with(|_| {
-                #[cfg(rcc_h7)]
+                cfg_if! {
+                    if #[cfg(rcc_f1)] {
+                        enable!(apb1enr, set_dacen, apb1rstr, set_dacrst);
+                    } else if #[cfg(rcc_h7)] {
                         enable!(apb1lenr, set_dac12en, apb1lrstr, set_dac12rst);
-                #[cfg(rcc_h7ab)]
+                    } else if #[cfg(rcc_h7ab)] {
                         enable!(apb1lenr, set_dac1en, apb1lrstr, set_dac1rst);
-                #[cfg(stm32g0)]
+                    } else if #[cfg(stm32g0)] {
                         enable!(apbenr1, set_dac1en, apbrstr1, set_dac1rst);
-                #[cfg(any(stm32l4, stm32l5))]
+                    } else if #[cfg(any(stm32l4, stm32l5))] {
                         enable!(apb1enr1, set_dac1en, apb1rstr1, set_dac1rst);
+                    } else {
+                        unimplemented!("DAC enable/reset is not yet implemented for this chip");
+                    }
+                }
             });
 
-            if channels >= 1 {
             T::regs().cr().modify(|reg| {
-                    reg.set_en1(true);
+                for ch in 0..channels {
-                });
+                    reg.set_en(ch as usize, true);
                 }
-
-            if channels >= 2 {
-                T::regs().cr().modify(|reg| {
-                    reg.set_en2(true);
             });
         }
-        }
 
         Self { channels, _peri: peri }
     }
@@ -156,17 +168,10 @@ impl<'d, T: Instance> Dac<'d, T> {
 
     fn set_channel_enable(&mut self, ch: Channel, on: bool) -> Result<(), Error> {
         self.check_channel_exists(ch)?;
-        match ch {
+        unsafe {
-            Channel::Ch1 => unsafe {
             T::regs().cr().modify(|reg| {
-                    reg.set_en1(on);
+                reg.set_en(ch.index(), on);
             })
-            },
-            Channel::Ch2 => unsafe {
-                T::regs().cr().modify(|reg| {
-                    reg.set_en2(on);
-                });
-            },
         }
         Ok(())
     }
@@ -203,17 +208,10 @@ impl<'d, T: Instance> Dac<'d, T> {
 
     pub fn trigger(&mut self, ch: Channel) -> Result<(), Error> {
         self.check_channel_exists(ch)?;
-        match ch {
+        unsafe {
-            Channel::Ch1 => unsafe {
             T::regs().swtrigr().write(|reg| {
-                    reg.set_swtrig1(true);
+                reg.set_swtrig(ch.index(), true);
             });
-            },
-            Channel::Ch2 => unsafe {
-                T::regs().swtrigr().write(|reg| {
-                    reg.set_swtrig2(true);
-                })
-            },
         }
         Ok(())
     }
@@ -221,38 +219,53 @@ impl<'d, T: Instance> Dac<'d, T> {
     pub fn trigger_all(&mut self) {
         unsafe {
             T::regs().swtrigr().write(|reg| {
-                reg.set_swtrig1(true);
+                reg.set_swtrig(Channel::Ch1.index(), true);
-                reg.set_swtrig2(true);
+                reg.set_swtrig(Channel::Ch2.index(), true);
             })
         }
     }
 
     pub fn set(&mut self, ch: Channel, value: Value) -> Result<(), Error> {
         self.check_channel_exists(ch)?;
-        match ch {
+        match value {
-            Channel::Ch1 => match value {
             Value::Bit8(v) => unsafe {
-                    T::regs().dhr8r1().write(|reg| reg.set_dacc1dhr(v));
+                T::regs().dhr8r(ch.index()).write(|reg| reg.set_dhr(v));
             },
             Value::Bit12(v, Alignment::Left) => unsafe {
-                    T::regs().dhr12l1().write(|reg| reg.set_dacc1dhr(v));
+                T::regs().dhr12l(ch.index()).write(|reg| reg.set_dhr(v));
             },
             Value::Bit12(v, Alignment::Right) => unsafe {
-                    T::regs().dhr12r1().write(|reg| reg.set_dacc1dhr(v));
+                T::regs().dhr12r(ch.index()).write(|reg| reg.set_dhr(v));
-                },
-            },
-            Channel::Ch2 => match value {
-                Value::Bit8(v) => unsafe {
-                    T::regs().dhr8r2().write(|reg| reg.set_dacc2dhr(v));
-                },
-                Value::Bit12(v, Alignment::Left) => unsafe {
-                    T::regs().dhr12l2().write(|reg| reg.set_dacc2dhr(v));
-                },
-                Value::Bit12(v, Alignment::Right) => unsafe {
-                    T::regs().dhr12r2().write(|reg| reg.set_dacc2dhr(v));
-                },
             },
         }
         Ok(())
     }
 }
+
+pub(crate) mod sealed {
+    pub trait Instance {
+        fn regs() -> &'static crate::pac::dac::Dac;
+    }
+}
+
+pub trait Instance: sealed::Instance + 'static {}
+
+pub trait DacPin<T: Instance, const C: u8>: crate::gpio::Pin + 'static {}
+
+foreach_peripheral!(
+    (dac, $inst:ident) => {
+        impl crate::dac::sealed::Instance for peripherals::$inst {
+            fn regs() -> &'static crate::pac::dac::Dac {
+                &crate::pac::$inst
+            }
+        }
+
+        impl crate::dac::Instance for peripherals::$inst {}
+    };
+);
+
+macro_rules! impl_dac_pin {
+    ($inst:ident, $pin:ident, $ch:expr) => {
+        impl crate::dac::DacPin<peripherals::$inst, $ch> for crate::peripherals::$pin {}
+    };
+}

embassy-stm32/src/dac/mod.rs

@@ -1,36 +0,0 @@
-#![macro_use]
-
-#[cfg_attr(dac_v1, path = "v1.rs")]
-#[cfg_attr(dac_v2, path = "v2.rs")]
-mod _version;
-pub use _version::*;
-
-use crate::peripherals;
-
-pub(crate) mod sealed {
-    pub trait Instance {
-        fn regs() -> &'static crate::pac::dac::Dac;
-    }
-}
-
-pub trait Instance: sealed::Instance + 'static {}
-
-pub trait DacPin<T: Instance, const C: u8>: crate::gpio::Pin + 'static {}
-
-foreach_peripheral!(
-    (dac, $inst:ident) => {
-        impl crate::dac::sealed::Instance for peripherals::$inst {
-            fn regs() -> &'static crate::pac::dac::Dac {
-                &crate::pac::$inst
-            }
-        }
-
-        impl crate::dac::Instance for peripherals::$inst {}
-    };
-);
-
-macro_rules! impl_dac_pin {
-    ($inst:ident, $pin:ident, $ch:expr) => {
-        impl crate::dac::DacPin<peripherals::$inst, $ch> for crate::peripherals::$pin {}
-    };
-}

embassy-stm32/src/dac/v1.rs

@@ -1 +0,0 @@
-

examples/stm32f1/Cargo.toml

@@ -6,7 +6,7 @@ version = "0.1.0"
 [dependencies]
 embassy-util = { version = "0.1.0", path = "../../embassy-util", features = ["defmt"] }
 embassy-executor = { version = "0.1.0", path = "../../embassy-executor", features = ["defmt", "defmt-timestamp-uptime", "time-tick-32768hz"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f103c8", "unstable-pac", "memory-x", "time-driver-any"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f103rc", "unstable-pac", "memory-x", "time-driver-any"]  }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
 embassy-usb-serial = { version = "0.1.0", path = "../../embassy-usb-serial", features = ["defmt"] }
 
@@ -20,6 +20,7 @@ panic-probe = { version = "0.3", features = ["print-defmt"] }
 futures = { version = "0.3.17", default-features = false, features = ["async-await"] }
 heapless = { version = "0.7.5", default-features = false }
 nb = "1.0.0"
+micromath = "2.0.0"
 
 [profile.dev]
 opt-level = "s"

examples/stm32f1/src/bin/dac.rs

@@ -0,0 +1,37 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::*;
+use embassy_executor::executor::Spawner;
+use embassy_stm32::dac::{Channel, Dac, Value};
+use embassy_stm32::Peripherals;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner, p: Peripherals) -> ! {
+    info!("Hello World, dude!");
+
+    let mut dac = Dac::new_1ch(p.DAC, p.PA4);
+
+    loop {
+        for v in 0..=255 {
+            unwrap!(dac.set(Channel::Ch1, Value::Bit8(to_sine_wave(v))));
+            unwrap!(dac.trigger(Channel::Ch1));
+        }
+    }
+}
+
+use micromath::F32Ext;
+
+fn to_sine_wave(v: u8) -> u8 {
+    if v >= 128 {
+        // top half
+        let r = 3.14 * ((v - 128) as f32 / 128.0);
+        (r.sin() * 128.0 + 127.0) as u8
+    } else {
+        // bottom half
+        let r = 3.14 + 3.14 * (v as f32 / 128.0);
+        (r.sin() * 128.0 + 127.0) as u8
+    }
+}

stm32-data

@@ -1 +1 @@
-Subproject commit b13ba26f6f9b7049097e39ccc7e5e246ac023d15
+Subproject commit ac5e65f02a48a443b160e08e8db4bbd7c7787ab4