max/embassy
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

stm32/rtc: impl. functions on trait

Browse Source
This commit is contained in:
xoviat
2023-04-18 20:35:43 -05:00
parent 4de4039417
commit e24421a393
3 changed files with 74 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

60
embassy-stm32/src/rtc/v2.rs
View File

@@ -1,6 +1,6 @@
use stm32_metapac::rtc::vals::{Init, Osel, Pol};
use super::{Instance, RtcConfig};
use super::{sealed, Instance, RtcConfig};
use crate::pac::rtc::Rtc;
impl<'d, T: Instance> super::Rtc<'d, T> {
@@ -197,37 +197,33 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
}
}
/// Read content of the backup register.
///
/// The registers retain their values during wakes from standby mode or system resets. They also
/// retain their value when Vdd is switched off as long as V_BAT is powered.
pub fn read_backup_register(rtc: &Rtc, register: usize) -> Option<u32> {
if register < BACKUP_REGISTER_COUNT {
Some(unsafe { rtc.bkpr(register).read().bkp() })
} else {
None
impl sealed::Instance for crate::peripherals::RTC {
const BACKUP_REGISTER_COUNT: usize = 20;
unsafe fn enable_peripheral_clk() {
#[cfg(any(rtc_v2l4, rtc_v2wb))]
{
// enable peripheral clock for communication
crate::pac::RCC.apb1enr1().modify(|w| w.set_rtcapben(true));
// read to allow the pwr clock to enable
crate::pac::PWR.cr1().read();
}
}
fn read_backup_register(rtc: &Rtc, register: usize) -> Option<u32> {
if register < Self::BACKUP_REGISTER_COUNT {
Some(unsafe { rtc.bkpr(register).read().bkp() })
} else {
None
}
}
fn write_backup_register(rtc: &Rtc, register: usize, value: u32) {
if register < Self::BACKUP_REGISTER_COUNT {
unsafe { rtc.bkpr(register).write(|w| w.set_bkp(value)) }
}
}
}
/// Set content of the backup register.
///
/// The registers retain their values during wakes from standby mode or system resets. They also
/// retain their value when Vdd is switched off as long as V_BAT is powered.
pub fn write_backup_register(rtc: &Rtc, register: usize, value: u32) {
if register < BACKUP_REGISTER_COUNT {
unsafe { rtc.bkpr(register).write(|w| w.set_bkp(value)) }
}
}
pub(crate) unsafe fn enable_peripheral_clk() {
#[cfg(any(rtc_v2l4, rtc_v2wb))]
{
// enable peripheral clock for communication
crate::pac::RCC.apb1enr1().modify(|w| w.set_rtcapben(true));
// read to allow the pwr clock to enable
crate::pac::PWR.cr1().read();
}
}
pub const BACKUP_REGISTER_COUNT: usize = 20;
impl Instance for crate::peripherals::RTC {}