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stm32g0: Add support for low-power run

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This commit is contained in:
Ben Gamari 2021-08-31 01:51:49 -04:00
parent 794798e225
commit 573e6ec373
1 changed files with 16 additions and 1 deletions
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17
embassy-stm32/src/rcc/g0/mod.rs
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@ -49,7 +49,6 @@ impl Into<u8> for HSI16Prescaler {
} }
} }
impl Into<u8> for APBPrescaler { impl Into<u8> for APBPrescaler {
fn into(self) -> u8 { fn into(self) -> u8 {
match self { match self {
@ -83,6 +82,7 @@ pub struct Config {
mux: ClockSrc, mux: ClockSrc,
ahb_pre: AHBPrescaler, ahb_pre: AHBPrescaler,
apb_pre: APBPrescaler, apb_pre: APBPrescaler,
low_power_run: bool,
} }
impl Default for Config { impl Default for Config {
@ -92,6 +92,7 @@ impl Default for Config {
mux: ClockSrc::HSI16(HSI16Prescaler::NotDivided), mux: ClockSrc::HSI16(HSI16Prescaler::NotDivided),
ahb_pre: AHBPrescaler::NotDivided, ahb_pre: AHBPrescaler::NotDivided,
apb_pre: APBPrescaler::NotDivided, apb_pre: APBPrescaler::NotDivided,
low_power_run: false,
} }
} }
} }
@ -114,6 +115,12 @@ impl Config {
self.apb_pre = pre; self.apb_pre = pre;
self self
} }
#[inline]
pub fn low_power_run(mut self, on: bool) -> Self {
self.low_power_run = on;
self
}
} }
/// RCC peripheral /// RCC peripheral
@ -206,6 +213,14 @@ impl RccExt for RCC {
} }
}; };
let pwr = pac::PWR;
if cfgr.low_power_run {
assert!(sys_clk.hz() <= 2_000_000.hz());
unsafe {
pwr.cr1().modify(|w| w.set_lpr(true));
}
}
Clocks { Clocks {
sys: sys_clk.hz(), sys: sys_clk.hz(),
ahb: ahb_freq.hz(), ahb: ahb_freq.hz(),