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stm32/adc: Ensure that clock is enabled

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Sadly due to the inconsistency in clocking configuration across devices
we cannot use RccPeripheral.
This commit is contained in:
Ben Gamari 2021-09-28 20:29:46 -04:00
parent 573e6ec373
commit 0b9961584b
1 changed files with 12 additions and 0 deletions
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12
embassy-stm32/src/adc/v3.rs
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@ -6,6 +6,17 @@ use embedded_hal::blocking::delay::DelayUs;
pub const VDDA_CALIB_MV: u32 = 3000; pub const VDDA_CALIB_MV: u32 = 3000;
/// Sadly we cannot use `RccPeripheral::enable` since devices are quite inconsistent ADC clock
/// configuration.
unsafe fn enable() {
#[cfg(rcc_h7)]
crate::pac::RCC.apb2enr().modify(|w| w.set_adcen(true));
#[cfg(rcc_g0)]
crate::pac::RCC.apbenr2().modify(|w| w.set_adcen(true));
#[cfg(rcc_l4)]
crate::pac::RCC.ahb2enr().modify(|w| w.set_adcen(true));
}
pub enum Resolution { pub enum Resolution {
TwelveBit, TwelveBit,
TenBit, TenBit,
@ -196,6 +207,7 @@ impl<'d, T: Instance> Adc<'d, T> {
pub fn new(_peri: impl Unborrow<Target = T> + 'd, delay: &mut impl DelayUs<u32>) -> Self { pub fn new(_peri: impl Unborrow<Target = T> + 'd, delay: &mut impl DelayUs<u32>) -> Self {
unborrow!(_peri); unborrow!(_peri);
unsafe { unsafe {
enable();
T::regs().cr().modify(|reg| { T::regs().cr().modify(|reg| {
#[cfg(not(adc_g0))] #[cfg(not(adc_g0))]
reg.set_deeppwd(false); reg.set_deeppwd(false);