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Use RccPeripheral for DAC and add a hackfix for H7

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This commit is contained in:
chemicstry 2022-08-04 03:31:47 +03:00
parent d990740dd5
commit 206b7fd8ed
1 changed files with 37 additions and 30 deletions
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67
embassy-stm32/src/dac.rs
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@ -1,9 +1,9 @@
#![macro_use]
use cfg_if::cfg_if;
use embassy_hal_common::{into_ref, PeripheralRef};
use crate::pac::dac;
use crate::rcc::RccPeripheral;
use crate::{peripherals, Peripheral};
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
@ -102,14 +102,6 @@ pub struct Dac<'d, T: Instance> {
_peri: PeripheralRef<'d, T>,
}
macro_rules! enable {
($enable_reg:ident, $enable_field:ident, $reset_reg:ident, $reset_field:ident) => {
crate::pac::RCC.$enable_reg().modify(|w| w.$enable_field(true));
crate::pac::RCC.$reset_reg().modify(|w| w.$reset_field(true));
crate::pac::RCC.$reset_reg().modify(|w| w.$reset_field(false));
};
}
impl<'d, T: Instance> Dac<'d, T> {
pub fn new_1ch(peri: impl Peripheral<P = T> + 'd, _ch1: impl Peripheral<P = impl DacPin<T, 1>> + 'd) -> Self {
into_ref!(peri);
@ -126,27 +118,10 @@ impl<'d, T: Instance> Dac<'d, T> {
}
fn new_inner(peri: PeripheralRef<'d, T>, channels: u8) -> Self {
unsafe {
// Sadly we cannot use `RccPeripheral::enable` since devices are quite inconsistent DAC clock
// configuration.
critical_section::with(|_| {
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);
} else if #[cfg(rcc_h7ab)] {
enable!(apb1lenr, set_dac1en, apb1lrstr, set_dac1rst);
} else if #[cfg(stm32g0)] {
enable!(apbenr1, set_dac1en, apbrstr1, set_dac1rst);
} 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");
}
}
});
T::enable();
T::reset();
unsafe {
T::regs().cr().modify(|reg| {
for ch in 0..channels {
reg.set_en(ch as usize, true);
@ -248,12 +223,44 @@ pub(crate) mod sealed {
}
}
pub trait Instance: sealed::Instance + 'static {}
pub trait Instance: sealed::Instance + RccPeripheral + 'static {}
pub trait DacPin<T: Instance, const C: u8>: crate::gpio::Pin + 'static {}
foreach_peripheral!(
(dac, $inst:ident) => {
// H7 uses single bit for both DAC1 and DAC2, this is a hack until a proper fix is implemented
#[cfg(rcc_h7)]
impl crate::rcc::sealed::RccPeripheral for peripherals::$inst {
fn frequency() -> crate::time::Hertz {
critical_section::with(|_| unsafe {
crate::rcc::get_freqs().apb1
})
}
fn reset() {
critical_section::with(|_| unsafe {
crate::pac::RCC.apb1lrstr().modify(|w| w.set_dac12rst(true));
crate::pac::RCC.apb1lrstr().modify(|w| w.set_dac12rst(false));
})
}
fn enable() {
critical_section::with(|_| unsafe {
crate::pac::RCC.apb1lenr().modify(|w| w.set_dac12en(true));
})
}
fn disable() {
critical_section::with(|_| unsafe {
crate::pac::RCC.apb1lenr().modify(|w| w.set_dac12en(false));
})
}
}
#[cfg(rcc_h7)]
impl crate::rcc::RccPeripheral for peripherals::$inst {}
impl crate::dac::sealed::Instance for peripherals::$inst {
fn regs() -> &'static crate::pac::dac::Dac {
&crate::pac::$inst