Merge pull request #2791 from taunusflieger/feature/fix-spi

Fix for SPI and CRC reg changes in stm32-data

11 files changed, 369 insertions, 30 deletions

diff --git a/embassy-stm32/Cargo.toml b/embassy-stm32/Cargo.toml
index 89b24f0eb..93792ecf8 100644
--- a/embassy-stm32/Cargo.toml
+++ b/embassy-stm32/Cargo.toml
@@ -70,7 +70,7 @@ rand_core = "0.6.3"
 sdio-host = "0.5.0"
 critical-section = "1.1"
 #stm32-metapac = { version = "15" }
-stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-2b7ec569a5510c324693f0515ac8ea20b12917a9" }
+stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-0c4baf478324e19741c7a9795ab0aa8217c3691c" }
 
 vcell = "0.1.3"
 nb = "1.0.0"
@@ -96,7 +96,7 @@ proc-macro2 = "1.0.36"
 quote = "1.0.15"
 
 #stm32-metapac = { version = "15", default-features = false, features = ["metadata"]}
-stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-2b7ec569a5510c324693f0515ac8ea20b12917a9", default-features = false, features = ["metadata"]}
+stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-0c4baf478324e19741c7a9795ab0aa8217c3691c", default-features = false, features = ["metadata"]}
 
 [features]
 default = ["rt"]
diff --git a/embassy-stm32/build.rs b/embassy-stm32/build.rs
index 38b6c480c..0f87dd8ac 100644
--- a/embassy-stm32/build.rs
+++ b/embassy-stm32/build.rs
@@ -272,8 +272,6 @@ fn main() {
                 "Bank1"
             } else if region.name.starts_with("BANK_2") {
                 "Bank2"
-            } else if region.name == "OTP" {
-                "Otp"
             } else {
                 continue;
             }
diff --git a/embassy-stm32/src/adc/g4.rs b/embassy-stm32/src/adc/g4.rs
new file mode 100644
index 000000000..f6741f019
--- /dev/null
+++ b/embassy-stm32/src/adc/g4.rs
@@ -0,0 +1,304 @@
+#[allow(unused)]
+use pac::adc::vals::{Adcaldif, Difsel, Exten};
+use pac::adccommon::vals::Presc;
+
+use super::{blocking_delay_us, Adc, AdcPin, Instance, InternalChannel, Resolution, SampleTime};
+use crate::time::Hertz;
+use crate::{pac, Peripheral};
+
+/// Default VREF voltage used for sample conversion to millivolts.
+pub const VREF_DEFAULT_MV: u32 = 3300;
+/// VREF voltage used for factory calibration of VREFINTCAL register.
+pub const VREF_CALIB_MV: u32 = 3300;
+
+/// Max single ADC operation clock frequency
+#[cfg(stm32g4)]
+const MAX_ADC_CLK_FREQ: Hertz = Hertz::mhz(60);
+#[cfg(stm32h7)]
+const MAX_ADC_CLK_FREQ: Hertz = Hertz::mhz(50);
+
+#[cfg(stm32g4)]
+const VREF_CHANNEL: u8 = 18;
+#[cfg(stm32g4)]
+const TEMP_CHANNEL: u8 = 16;
+
+#[cfg(stm32h7)]
+const VREF_CHANNEL: u8 = 19;
+#[cfg(stm32h7)]
+const TEMP_CHANNEL: u8 = 18;
+
+// TODO this should be 14 for H7a/b/35
+const VBAT_CHANNEL: u8 = 17;
+
+// NOTE: Vrefint/Temperature/Vbat are not available on all ADCs, this currently cannot be modeled with stm32-data, so these are available from the software on all ADCs
+/// Internal voltage reference channel.
+pub struct VrefInt;
+impl<T: Instance> InternalChannel<T> for VrefInt {}
+impl<T: Instance> super::SealedInternalChannel<T> for VrefInt {
+    fn channel(&self) -> u8 {
+        VREF_CHANNEL
+    }
+}
+
+/// Internal temperature channel.
+pub struct Temperature;
+impl<T: Instance> InternalChannel<T> for Temperature {}
+impl<T: Instance> super::SealedInternalChannel<T> for Temperature {
+    fn channel(&self) -> u8 {
+        TEMP_CHANNEL
+    }
+}
+
+/// Internal battery voltage channel.
+pub struct Vbat;
+impl<T: Instance> InternalChannel<T> for Vbat {}
+impl<T: Instance> super::SealedInternalChannel<T> for Vbat {
+    fn channel(&self) -> u8 {
+        VBAT_CHANNEL
+    }
+}
+
+// NOTE (unused): The prescaler enum closely copies the hardware capabilities,
+// but high prescaling doesn't make a lot of sense in the current implementation and is ommited.
+#[allow(unused)]
+enum Prescaler {
+    NotDivided,
+    DividedBy2,
+    DividedBy4,
+    DividedBy6,
+    DividedBy8,
+    DividedBy10,
+    DividedBy12,
+    DividedBy16,
+    DividedBy32,
+    DividedBy64,
+    DividedBy128,
+    DividedBy256,
+}
+
+impl Prescaler {
+    fn from_ker_ck(frequency: Hertz) -> Self {
+        let raw_prescaler = frequency.0 / MAX_ADC_CLK_FREQ.0;
+        match raw_prescaler {
+            0 => Self::NotDivided,
+            1 => Self::DividedBy2,
+            2..=3 => Self::DividedBy4,
+            4..=5 => Self::DividedBy6,
+            6..=7 => Self::DividedBy8,
+            8..=9 => Self::DividedBy10,
+            10..=11 => Self::DividedBy12,
+            _ => unimplemented!(),
+        }
+    }
+
+    fn divisor(&self) -> u32 {
+        match self {
+            Prescaler::NotDivided => 1,
+            Prescaler::DividedBy2 => 2,
+            Prescaler::DividedBy4 => 4,
+            Prescaler::DividedBy6 => 6,
+            Prescaler::DividedBy8 => 8,
+            Prescaler::DividedBy10 => 10,
+            Prescaler::DividedBy12 => 12,
+            Prescaler::DividedBy16 => 16,
+            Prescaler::DividedBy32 => 32,
+            Prescaler::DividedBy64 => 64,
+            Prescaler::DividedBy128 => 128,
+            Prescaler::DividedBy256 => 256,
+        }
+    }
+
+    fn presc(&self) -> Presc {
+        match self {
+            Prescaler::NotDivided => Presc::DIV1,
+            Prescaler::DividedBy2 => Presc::DIV2,
+            Prescaler::DividedBy4 => Presc::DIV4,
+            Prescaler::DividedBy6 => Presc::DIV6,
+            Prescaler::DividedBy8 => Presc::DIV8,
+            Prescaler::DividedBy10 => Presc::DIV10,
+            Prescaler::DividedBy12 => Presc::DIV12,
+            Prescaler::DividedBy16 => Presc::DIV16,
+            Prescaler::DividedBy32 => Presc::DIV32,
+            Prescaler::DividedBy64 => Presc::DIV64,
+            Prescaler::DividedBy128 => Presc::DIV128,
+            Prescaler::DividedBy256 => Presc::DIV256,
+        }
+    }
+}
+
+impl<'d, T: Instance> Adc<'d, T> {
+    /// Create a new ADC driver.
+    pub fn new(adc: impl Peripheral<P = T> + 'd) -> Self {
+        embassy_hal_internal::into_ref!(adc);
+        T::enable_and_reset();
+
+        let prescaler = Prescaler::from_ker_ck(T::frequency());
+
+        T::common_regs().ccr().modify(|w| w.set_presc(prescaler.presc()));
+
+        let frequency = Hertz(T::frequency().0 / prescaler.divisor());
+        info!("ADC frequency set to {} Hz", frequency.0);
+
+        if frequency > MAX_ADC_CLK_FREQ {
+            panic!("Maximal allowed frequency for the ADC is {} MHz and it varies with different packages, refer to ST docs for more information.", MAX_ADC_CLK_FREQ.0 /  1_000_000 );
+        }
+
+        let mut s = Self {
+            adc,
+            sample_time: SampleTime::from_bits(0),
+        };
+        s.power_up();
+        s.configure_differential_inputs();
+
+        s.calibrate();
+        blocking_delay_us(1);
+
+        s.enable();
+        s.configure();
+
+        s
+    }
+
+    fn power_up(&mut self) {
+        T::regs().cr().modify(|reg| {
+            reg.set_deeppwd(false);
+            reg.set_advregen(true);
+        });
+
+        blocking_delay_us(10);
+    }
+
+    fn configure_differential_inputs(&mut self) {
+        T::regs().difsel().modify(|w| {
+            for n in 0..20 {
+                w.set_difsel(n, Difsel::SINGLEENDED);
+            }
+        });
+    }
+
+    fn calibrate(&mut self) {
+        T::regs().cr().modify(|w| {
+            w.set_adcaldif(Adcaldif::SINGLEENDED);
+        });
+
+        T::regs().cr().modify(|w| w.set_adcal(true));
+
+        while T::regs().cr().read().adcal() {}
+    }
+
+    fn enable(&mut self) {
+        T::regs().isr().write(|w| w.set_adrdy(true));
+        T::regs().cr().modify(|w| w.set_aden(true));
+        while !T::regs().isr().read().adrdy() {}
+        T::regs().isr().write(|w| w.set_adrdy(true));
+    }
+
+    fn configure(&mut self) {
+        // single conversion mode, software trigger
+        T::regs().cfgr().modify(|w| {
+            w.set_cont(false);
+            w.set_exten(Exten::DISABLED);
+        });
+    }
+
+    /// Enable reading the voltage reference internal channel.
+    pub fn enable_vrefint(&self) -> VrefInt {
+        T::common_regs().ccr().modify(|reg| {
+            reg.set_vrefen(true);
+        });
+
+        VrefInt {}
+    }
+
+    /// Enable reading the temperature internal channel.
+    pub fn enable_temperature(&self) -> Temperature {
+        T::common_regs().ccr().modify(|reg| {
+            reg.set_vsenseen(true);
+        });
+
+        Temperature {}
+    }
+
+    /// Enable reading the vbat internal channel.
+    pub fn enable_vbat(&self) -> Vbat {
+        T::common_regs().ccr().modify(|reg| {
+            reg.set_vbaten(true);
+        });
+
+        Vbat {}
+    }
+
+    /// Set the ADC sample time.
+    pub fn set_sample_time(&mut self, sample_time: SampleTime) {
+        self.sample_time = sample_time;
+    }
+
+    /// Set the ADC resolution.
+    pub fn set_resolution(&mut self, resolution: Resolution) {
+        T::regs().cfgr().modify(|reg| reg.set_res(resolution.into()));
+    }
+
+    /// Perform a single conversion.
+    fn convert(&mut self) -> u16 {
+        T::regs().isr().modify(|reg| {
+            reg.set_eos(true);
+            reg.set_eoc(true);
+        });
+
+        // Start conversion
+        T::regs().cr().modify(|reg| {
+            reg.set_adstart(true);
+        });
+
+        while !T::regs().isr().read().eos() {
+            // spin
+        }
+
+        T::regs().dr().read().0 as u16
+    }
+
+    /// Read an ADC pin.
+    pub fn read<P>(&mut self, pin: &mut P) -> u16
+    where
+        P: AdcPin<T>,
+        P: crate::gpio::Pin,
+    {
+        pin.set_as_analog();
+
+        self.read_channel(pin.channel())
+    }
+
+    /// Read an ADC internal channel.
+    pub fn read_internal(&mut self, channel: &mut impl InternalChannel<T>) -> u16 {
+        self.read_channel(channel.channel())
+    }
+
+    fn read_channel(&mut self, channel: u8) -> u16 {
+        // Configure channel
+        Self::set_channel_sample_time(channel, self.sample_time);
+
+        #[cfg(stm32h7)]
+        {
+            T::regs().cfgr2().modify(|w| w.set_lshift(0));
+            T::regs()
+                .pcsel()
+                .write(|w| w.set_pcsel(channel as _, Pcsel::PRESELECTED));
+        }
+
+        T::regs().sqr1().write(|reg| {
+            reg.set_sq(0, channel);
+            reg.set_l(0);
+        });
+
+        self.convert()
+    }
+
+    fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
+        let sample_time = sample_time.into();
+        if ch <= 9 {
+            T::regs().smpr().modify(|reg| reg.set_smp(ch as _, sample_time));
+        } else {
+            T::regs().smpr2().modify(|reg| reg.set_smp((ch - 10) as _, sample_time));
+        }
+    }
+}
diff --git a/embassy-stm32/src/adc/mod.rs b/embassy-stm32/src/adc/mod.rs
index 24dd7cc3c..12c5751bd 100644
--- a/embassy-stm32/src/adc/mod.rs
+++ b/embassy-stm32/src/adc/mod.rs
@@ -12,6 +12,7 @@
 #[cfg_attr(adc_v2, path = "v2.rs")]
 #[cfg_attr(any(adc_v3, adc_g0, adc_h5), path = "v3.rs")]
 #[cfg_attr(adc_v4, path = "v4.rs")]
+#[cfg_attr(adc_g4, path = "g4.rs")]
 mod _version;
 
 #[allow(unused)]
@@ -79,13 +80,37 @@ pub(crate) fn blocking_delay_us(us: u32) {
 }
 
 /// ADC instance.
-#[cfg(not(any(adc_f1, adc_v1, adc_l0, adc_v2, adc_v3, adc_v4, adc_f3, adc_f3_v1_1, adc_g0, adc_h5)))]
+#[cfg(not(any(
+    adc_f1,
+    adc_v1,
+    adc_l0,
+    adc_v2,
+    adc_v3,
+    adc_v4,
+    adc_g4,
+    adc_f3,
+    adc_f3_v1_1,
+    adc_g0,
+    adc_h5
+)))]
 #[allow(private_bounds)]
 pub trait Instance: SealedInstance + crate::Peripheral<P = Self> {
     type Interrupt: crate::interrupt::typelevel::Interrupt;
 }
 /// ADC instance.
-#[cfg(any(adc_f1, adc_v1, adc_l0, adc_v2, adc_v3, adc_v4, adc_f3, adc_f3_v1_1, adc_g0, adc_h5))]
+#[cfg(any(
+    adc_f1,
+    adc_v1,
+    adc_l0,
+    adc_v2,
+    adc_v3,
+    adc_v4,
+    adc_g4,
+    adc_f3,
+    adc_f3_v1_1,
+    adc_g0,
+    adc_h5
+))]
 #[allow(private_bounds)]
 pub trait Instance: SealedInstance + crate::Peripheral<P = Self> + crate::rcc::RccPeripheral {
     type Interrupt: crate::interrupt::typelevel::Interrupt;
diff --git a/embassy-stm32/src/crc/v1.rs b/embassy-stm32/src/crc/v1.rs
index f8909d438..e8e0270af 100644
--- a/embassy-stm32/src/crc/v1.rs
+++ b/embassy-stm32/src/crc/v1.rs
@@ -32,6 +32,9 @@ impl<'d> Crc<'d> {
     /// Feeds a word to the peripheral and returns the current CRC value
     pub fn feed_word(&mut self, word: u32) -> u32 {
         // write a single byte to the device, and return the result
+        #[cfg(not(crc_v1))]
+        PAC_CRC.dr32().write_value(word);
+        #[cfg(crc_v1)]
         PAC_CRC.dr().write_value(word);
         self.read()
     }
@@ -39,6 +42,9 @@ impl<'d> Crc<'d> {
     /// Feed a slice of words to the peripheral and return the result.
     pub fn feed_words(&mut self, words: &[u32]) -> u32 {
         for word in words {
+            #[cfg(not(crc_v1))]
+            PAC_CRC.dr32().write_value(*word);
+            #[cfg(crc_v1)]
             PAC_CRC.dr().write_value(*word);
         }
 
@@ -46,6 +52,12 @@ impl<'d> Crc<'d> {
     }
 
     /// Read the CRC result value.
+    #[cfg(not(crc_v1))]
+    pub fn read(&self) -> u32 {
+        PAC_CRC.dr32().read()
+    }
+    /// Read the CRC result value.
+    #[cfg(crc_v1)]
     pub fn read(&self) -> u32 {
         PAC_CRC.dr().read()
     }
diff --git a/embassy-stm32/src/crc/v2v3.rs b/embassy-stm32/src/crc/v2v3.rs
index 46f5ea1be..13fb6778c 100644
--- a/embassy-stm32/src/crc/v2v3.rs
+++ b/embassy-stm32/src/crc/v2v3.rs
@@ -136,7 +136,7 @@ impl<'d> Crc<'d> {
     /// Feeds a byte into the CRC peripheral. Returns the computed checksum.
     pub fn feed_byte(&mut self, byte: u8) -> u32 {
         PAC_CRC.dr8().write_value(byte);
-        PAC_CRC.dr().read()
+        PAC_CRC.dr32().read()
     }
 
     /// Feeds an slice of bytes into the CRC peripheral. Returns the computed checksum.
@@ -144,30 +144,30 @@ impl<'d> Crc<'d> {
         for byte in bytes {
             PAC_CRC.dr8().write_value(*byte);
         }
-        PAC_CRC.dr().read()
+        PAC_CRC.dr32().read()
     }
     /// Feeds a halfword into the CRC peripheral. Returns the computed checksum.
     pub fn feed_halfword(&mut self, halfword: u16) -> u32 {
         PAC_CRC.dr16().write_value(halfword);
-        PAC_CRC.dr().read()
+        PAC_CRC.dr32().read()
     }
     /// Feeds an slice of halfwords into the CRC peripheral. Returns the computed checksum.
     pub fn feed_halfwords(&mut self, halfwords: &[u16]) -> u32 {
         for halfword in halfwords {
             PAC_CRC.dr16().write_value(*halfword);
         }
-        PAC_CRC.dr().read()
+        PAC_CRC.dr32().read()
     }
     /// Feeds a words into the CRC peripheral. Returns the computed checksum.
     pub fn feed_word(&mut self, word: u32) -> u32 {
-        PAC_CRC.dr().write_value(word as u32);
-        PAC_CRC.dr().read()
+        PAC_CRC.dr32().write_value(word as u32);
+        PAC_CRC.dr32().read()
     }
     /// Feeds an slice of words into the CRC peripheral. Returns the computed checksum.
     pub fn feed_words(&mut self, words: &[u32]) -> u32 {
         for word in words {
-            PAC_CRC.dr().write_value(*word as u32);
+            PAC_CRC.dr32().write_value(*word as u32);
         }
-        PAC_CRC.dr().read()
+        PAC_CRC.dr32().read()
     }
 }
diff --git a/embassy-stm32/src/flash/f4.rs b/embassy-stm32/src/flash/f4.rs
index 00e61f2d2..90f13ff29 100644
--- a/embassy-stm32/src/flash/f4.rs
+++ b/embassy-stm32/src/flash/f4.rs
@@ -16,7 +16,7 @@ mod alt_regions {
     use embassy_hal_internal::PeripheralRef;
     use stm32_metapac::FLASH_SIZE;
 
-    use crate::_generated::flash_regions::{OTPRegion, BANK1_REGION1, BANK1_REGION2, BANK1_REGION3, OTP_REGION};
+    use crate::_generated::flash_regions::{BANK1_REGION1, BANK1_REGION2, BANK1_REGION3};
     use crate::flash::{asynch, Async, Bank1Region1, Bank1Region2, Blocking, Error, Flash, FlashBank, FlashRegion};
     use crate::peripherals::FLASH;
 
@@ -62,7 +62,6 @@ mod alt_regions {
         pub bank2_region1: AltBank2Region1<'d, MODE>,
         pub bank2_region2: AltBank2Region2<'d, MODE>,
         pub bank2_region3: AltBank2Region3<'d, MODE>,
-        pub otp_region: OTPRegion<'d, MODE>,
     }
 
     impl<'d> Flash<'d> {
@@ -79,7 +78,6 @@ mod alt_regions {
                 bank2_region1: AltBank2Region1(&ALT_BANK2_REGION1, unsafe { p.clone_unchecked() }, PhantomData),
                 bank2_region2: AltBank2Region2(&ALT_BANK2_REGION2, unsafe { p.clone_unchecked() }, PhantomData),
                 bank2_region3: AltBank2Region3(&ALT_BANK2_REGION3, unsafe { p.clone_unchecked() }, PhantomData),
-                otp_region: OTPRegion(&OTP_REGION, unsafe { p.clone_unchecked() }, PhantomData),
             }
         }
 
@@ -96,7 +94,6 @@ mod alt_regions {
                 bank2_region1: AltBank2Region1(&ALT_BANK2_REGION1, unsafe { p.clone_unchecked() }, PhantomData),
                 bank2_region2: AltBank2Region2(&ALT_BANK2_REGION2, unsafe { p.clone_unchecked() }, PhantomData),
                 bank2_region3: AltBank2Region3(&ALT_BANK2_REGION3, unsafe { p.clone_unchecked() }, PhantomData),
-                otp_region: OTPRegion(&OTP_REGION, unsafe { p.clone_unchecked() }, PhantomData),
             }
         }
     }
diff --git a/embassy-stm32/src/flash/h50.rs b/embassy-stm32/src/flash/h50.rs
index db05bef5d..5b15be261 100644
--- a/embassy-stm32/src/flash/h50.rs
+++ b/embassy-stm32/src/flash/h50.rs
@@ -55,7 +55,6 @@ pub(crate) unsafe fn blocking_write(start_address: u32, buf: &[u8; WRITE_SIZE])
 }
 
 pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), Error> {
-    assert!(sector.bank != FlashBank::Otp);
     assert!(sector.index_in_bank < 8);
 
     while busy() {}
@@ -63,9 +62,8 @@ pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), E
     interrupt::free(|_| {
         pac::FLASH.nscr().modify(|w| {
             w.set_bksel(match sector.bank {
-                FlashBank::Bank1 => Bksel::B_0X0,
-                FlashBank::Bank2 => Bksel::B_0X1,
-                _ => unreachable!(),
+                FlashBank::Bank1 => Bksel::BANK1,
+                FlashBank::Bank2 => Bksel::BANK2,
             });
             w.set_snb(sector.index_in_bank);
             w.set_ser(true);
diff --git a/embassy-stm32/src/flash/mod.rs b/embassy-stm32/src/flash/mod.rs
index 1d8031e82..9d7861816 100644
--- a/embassy-stm32/src/flash/mod.rs
+++ b/embassy-stm32/src/flash/mod.rs
@@ -89,8 +89,6 @@ pub enum FlashBank {
     Bank1 = 0,
     /// Bank 2
     Bank2 = 1,
-    /// OTP region
-    Otp,
 }
 
 #[cfg_attr(any(flash_l0, flash_l1, flash_l4, flash_wl, flash_wb), path = "l.rs")]
diff --git a/embassy-stm32/src/spi/mod.rs b/embassy-stm32/src/spi/mod.rs
index 0b38c4288..450975f18 100644
--- a/embassy-stm32/src/spi/mod.rs
+++ b/embassy-stm32/src/spi/mod.rs
@@ -735,18 +735,22 @@ trait RegsExt {
 
 impl RegsExt for Regs {
     fn tx_ptr<W>(&self) -> *mut W {
-        #[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
+        #[cfg(any(spi_v1, spi_f1))]
         let dr = self.dr();
+        #[cfg(spi_v2)]
+        let dr = self.dr16();
         #[cfg(any(spi_v3, spi_v4, spi_v5))]
-        let dr = self.txdr();
+        let dr = self.txdr32();
         dr.as_ptr() as *mut W
     }
 
     fn rx_ptr<W>(&self) -> *mut W {
-        #[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
+        #[cfg(any(spi_v1, spi_f1))]
         let dr = self.dr();
+        #[cfg(spi_v2)]
+        let dr = self.dr16();
         #[cfg(any(spi_v3, spi_v4, spi_v5))]
-        let dr = self.rxdr();
+        let dr = self.rxdr32();
         dr.as_ptr() as *mut W
     }
 }
@@ -815,11 +819,14 @@ fn spin_until_rx_ready(regs: Regs) -> Result<(), Error> {
 fn flush_rx_fifo(regs: Regs) {
     #[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
     while regs.sr().read().rxne() {
+        #[cfg(not(spi_v2))]
         let _ = regs.dr().read();
+        #[cfg(spi_v2)]
+        let _ = regs.dr16().read();
     }
     #[cfg(any(spi_v3, spi_v4, spi_v5))]
     while regs.sr().read().rxp() {
-        let _ = regs.rxdr().read();
+        let _ = regs.rxdr32().read();
     }
 }
 
diff --git a/examples/stm32g4/src/bin/adc.rs b/examples/stm32g4/src/bin/adc.rs
index 68b54e406..3de38cbd6 100644
--- a/examples/stm32g4/src/bin/adc.rs
+++ b/examples/stm32g4/src/bin/adc.rs
@@ -29,7 +29,7 @@ async fn main(_spawner: Spawner) {
     info!("Hello World!");
 
     let mut adc = Adc::new(p.ADC2);
-    adc.set_sample_time(SampleTime::CYCLES32_5);
+    adc.set_sample_time(SampleTime::CYCLES24_5);
 
     loop {
         let measured = adc.read(&mut p.PA7);