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Merge pull request #1963 from Mirror0/restore-f7-rtc

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Restore RTC configuration for `STM32F7` boards
This commit is contained in:
xoviat 2023-09-28 11:32:50 +00:00 committed by GitHub
commit a72a91ab06
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2 changed files with 19 additions and 1 deletions
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18
embassy-stm32/src/rcc/f7.rs
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@ -1,6 +1,7 @@
use crate::pac::pwr::vals::Vos;
use crate::pac::rcc::vals::{Hpre, Ppre, Sw};
use crate::pac::{FLASH, PWR, RCC};
use crate::rcc::bd::{BackupDomain, RtcClockSource};
use crate::rcc::{set_freqs, Clocks};
use crate::time::Hertz;
@ -22,6 +23,9 @@ pub struct Config {
pub pclk2: Option<Hertz>,
pub pll48: bool,
pub rtc: Option<RtcClockSource>,
pub lsi: bool,
pub lse: Option<Hertz>,
}
fn setup_pll(pllsrcclk: u32, use_hse: bool, pllsysclk: Option<u32>, pll48clk: bool) -> PllResults {
@ -259,6 +263,18 @@ pub(crate) unsafe fn init(config: Config) {
})
});
BackupDomain::configure_ls(
config.rtc.unwrap_or(RtcClockSource::NOCLOCK),
config.lsi,
config.lse.map(|_| Default::default()),
);
let rtc = match config.rtc {
Some(RtcClockSource::LSI) => Some(LSI_FREQ),
Some(RtcClockSource::LSE) => Some(config.lse.unwrap()),
_ => None,
};
set_freqs(Clocks {
sys: Hertz(sysclk),
apb1: Hertz(pclk1),
@ -272,6 +288,8 @@ pub(crate) unsafe fn init(config: Config) {
ahb3: Hertz(hclk),
pll48: plls.pll48clk.map(Hertz),
rtc,
});
}

2
embassy-stm32/src/rcc/mod.rs
View File

@ -97,7 +97,7 @@ pub struct Clocks {
#[cfg(stm32f334)]
pub hrtim: Option<Hertz>,
#[cfg(any(rcc_wb, rcc_f4, rcc_f410))]
#[cfg(any(rcc_wb, rcc_f4, rcc_f410, rcc_f7))]
/// Set only if the lsi or lse is configured, indicates stop is supported
pub rtc: Option<Hertz>,